WO2025160064A1 - Systems and methods for removing condensation from heating units - Google Patents

Abstract

A heating unit is disclosed for use with a fuel supply to supply fuel and a flue to discharge exhaust. The heating unit may include a heater configured to generate heat by burning the fuel from the fuel supply, to generate exhaust from the burning of the fuel, and to provide the exhaust to the flue to be discharged. The heating unit also may include a drip pan configured to collect condensate from the heater, a vaporizer configured to vaporize the collected condensate, and a vapor discharge duct connecting the drip pan to the flue to provide a portion of the vaporized condensate into the flue so as to be discharged with the exhaust.

Description

SYSTEMS AND METHODS FOR REMOVING CONDENSATION FROM HEATING UNITS

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to and the benefit of US provisional application No. 63/624,058, filed January 23, 2024, which is hereby incorporated by reference herein in its entirety.

FIELD

[0002] This disclosure relates generally to heating units and more particularly to systems and methods for removing condensation from heating units.

BACKGROUND

[0003] Some heating units, such as water heaters, boilers, heat pumps, etc. may generate unwanted condensate. If there is access to a drain, the condensate may be directed to the drain via one or more pipes. However, if the heating units are located where a drain is not readily accessible, such as, for example, in the basement of a structure, then the condensate may be pumped away from the heating units to a drain or piped through an exterior wall of the structure.

[0004] FIG. 1 illustrates a heating unit 100. The heating unit 100 may include a fuel burning water heater 102, a fuel supply line 104, a water supply line 106, a water output line 108, and a main flue 100. In operation, cool water may be supplied by the water supply line 106, and fuel may be supplied to the fuel burning water heater 102. In a heating mode, the fuel burning water heater 102 may bum the supplied fuel at or near a heat exchanger to heat water stored therein. The heated water may be supplied to the end user via the water output line 108. When the fuel is burned, the exhaust gases may be discharged via the main flue 100. In operation, the heat exchanger may produce condensate. This condensate may fall, due to gravity, to the bottom of the fuel burning water heater 102.

[0005] FIG. IB illustrates the heating unit 100 after generating condensate 110. In some instances, the condensate 110 may be removed from the fuel burning water heater 102 in order to prevent corrosion of the fuel burning water heater 102. Further, the condensate 110 may be removed from the fuel burning water heater 102 in order to prevent the development of bacteria, fungus, and/or viruses.

BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The detailed description is set forth with reference to the accompanying drawings. In some instances, the use of the same reference numerals may indicate similar or identical items. Various embodiments may utilize elements and/or components other than those illustrated in the drawings, and some elements and/or components may not be present in various embodiments. Throughout this disclosure, depending on the context, singular and plural terminology may be used interchangeably.

[0007] FIG. 1 A illustrates a prior art heating unit.

[0008] FIG. IB illustrates the prior art heating unit of FIG. 1 A after generating condensate.

[0009] FIG. 2 illustrates a heating unit in accordance with one or more embodiments of the present disclosure.

[0010] FIG. 3 A illustrates a portion of the heating unit of FIG. 2 at one stage of operation in accordance with one or more embodiments of the present disclosure. [0011] FIG. 3B illustrates the portion of FIG. 3 A at a second stage of operation in accordance with one or more embodiments of the present disclosure.

[0012] FIG. 4 illustrates a method of operating the heating unit of FIG. 2 in accordance with one or more embodiments of the present disclosure.

[0013] FIG. 5A illustrates a controller of the heating unit of FIG. 3A in accordance with one or more embodiments of the present disclosure.

[0014] FIG. 5B illustrates the controller of the heating unit of FIG. 3B in accordance with one or more embodiments of the present disclosure.

[0015] FIG. 6 illustrates another heating unit in accordance with one or more embodiments of the present disclosure.

[0016] FIG. 7A illustrates a portion of the heating unit of FIG. 6 at one stage of operation in accordance with one or more embodiments of the present disclosure. [0017] FIG. 7B illustrates the portion of FIG. 6A at a second stage of operation in accordance with one or more embodiments of the present disclosure. [0018] FIG. 8 illustrates a method of operating the heating unit of FIG. 6 in accordance with one or more embodiments of the present disclosure.

[0019] FIG. 9A illustrates a controller of the heating unit of FIG. 6A in accordance with one or more embodiments of the present disclosure.

[0020] FIG. 9B illustrates the controller of the heating unit of FIG. 6B in accordance with one or more embodiments of the present disclosure.

[0021] FIG. 10 illustrates another heating unit in accordance with one or more embodiments of the present disclosure.

[0022] FIG. 11 illustrates an enlarged view of a portion of the heating unit of FIG.

10 in accordance with one or more embodiments of the present disclosure.

[0023] FIG. 12A illustrates a portion of the heating unit of FIG. 10 at one stage of operation in accordance with one or more embodiments of the present disclosure.

[0024] FIG. 12B illustrates the portion of FIG. 12A at a second stage of operation in accordance with one or more embodiments of the present disclosure.

[0025] FIG. 13 illustrates a method of operating the heating unit of FIG. 10 in accordance with one or more embodiments of the present disclosure.

[0026] FIG. 14A illustrates a controller of the heating unit of FIG. 12A in accordance with one or more embodiments of the present disclosure.

[0027] FIG. 14B illustrates the controller of the heating unit of FIG. 12B in accordance with one or more embodiments of the present disclosure.

[0028] FIG. 15 illustrates another heating unit in accordance with one or more embodiments of the present disclosure.

[0029] FIG. 16A illustrates a portion of the heating unit of FIG. 15 at one stage of operation in accordance with one or more embodiments of the present disclosure.

[0030] FIG. 16B illustrates the portion of FIG. 16A at a second stage of operation in accordance with one or more embodiments of the present disclosure.

[0031] FIG. 17 illustrates a method of operating the heating unit of FIG. 15 in accordance with one or more embodiments of the present disclosure.

[0032] FIG. 18A illustrates a controller of the heating unit of FIG. 16A in accordance with one or more embodiments of the present disclosure.

[0033] FIG. 18B illustrates the controller of the heating unit of FIG. 16B in accordance with one or more embodiments of the present disclosure. DETAILED DESCRIPTION

[0034] This disclosure relates generally to systems and methods for removing condensate that results in a fuel burning heating unit, such as condensate that may form on a heat exchanger or the like. In certain embodiments, a fuel burning heating unit may include a main flue configured to discharge exhaust, a drip pan configured to collect condensate, a vaporizer configured to vaporize the condensate, and a condensate discharge duct configured to discharge the condensate. In operation, the condensate may be vaporized and blown in the condensate discharge duct via a discharge fan. The condensate discharge duct may be connected to the main flue such that the vaporized condensate is discharged into the main flue so as to be removed with the discharged exhaust.

[0035] Although reference is made herein to a “vaporizer,” any type of device that may be used to produce mist or vapor may be used, such as an atomizer, nebulizer, etc., including, but not limited to, an ultrasonic device or any other type of device. Additionally, while reference is made to particular heating units herein, the systems and methods may also be applicable to other types of units, such as gas furnaces, condensing furnaces, etc.

[0036] Turning now to the drawings, FIG. 2 illustrates a heating unit 200 in accordance with one or more embodiments of the present disclosure. The heating unit 200 may include a fuel burning water heater 201, the fuel supply line 104, the water supply line 106, the water output line 108, the main flue 100, a drip pan 202, and a vapor discharge duct 204. In operation, fuel may be supplied to the fuel burning water heater 201. In a heating mode, the fuel burning water heater 201 may bum the supplied fuel at or near a heat exchanger to heat water stored therein. When the fuel is burned, the exhaust gases may be discharged via the main flue 100. In operation, the heat exchanger may produce condensate. This condensate 110 may fall, due to gravity, to the bottom of the fuel burning water heater 201 where it is collected in the drip pan 202. As will be described in greater detail below, the fuel burning water heater 201 may be configured to vaporize the condensate 110 and provide the vaporized condensate to the main flue 100 via the vapor discharge duct 204 so that the vaporized condensate can be discharged to an outdoor area with the exhaust through the main flue 100. In embodiments, an inlet tube shield may be provided to increase negative pressure on the vapor discharge duct 204. The inlet tube shield may also be provided at any other location to increase negative pressure.

[0037] FIG. 3 A illustrates a portion 206 of the heating unit 200 at one stage of operation. The portion 206 of the heating unit 200 may include a controller 302, a condensate detector 304, a vaporizer 306, a discharge fan 308, and communication lines 310, 312, and 314. The controller 302 may be configured to communicate with the condensate detector 304 via the communication line 310, with the vaporizer 306 via the communication line 312, and with the discharge fan 308 via the communication line 314.

[0038] In certain embodiments, the heating unit 200 may be configured to remove the condensate 110 by vaporizing the condensate via the vaporizer 306. The discharge fan 308 may blow the vapor to the vapor discharge duct 204. The vapor may then enter the main flue 100 via the vapor discharge duct and be discharged to an outdoor area. This will be described in greater detail with reference to FIG. 4.

[0039] In certain embodiments, the rate at which the condensate is vaporized by the vaporizer 306 may be adjusted (e.g., increased and/or decreased) based on data received from one or more sensors associated with the heating unit 200. For example, the data may include input and/or output flow rate data obtained from one or more flow rate sensors, input and/or output water temperatures and/or exhaust heat temperatures obtained from one or more temperature sensors, and/or any other types of data obtained from any other types of sensors. For example, this data may be used to determine an amount of condensate that is expected to form in a given time period, and this information may then be used to adjust the rate at which the condensate is vaporized. This may also apply to any other heating unit and vaporizer described herein. The vaporizer 306 may be throttled to maintain sufficient water levels.

[0040] Further, in certain embodiments, a heating element (not shown in the figure) may be provided within the heating unit 200 (for example, at the portion 206 of the heating unit 200). The heating element may be a resistive heating element that is provided to ensure that vaporized condensate does not condense back into a liquid form before it arrives at the vapor discharge duct 204 (which may occur, for example, during cold weather conditions). However, any other type of element capable of producing heat may also be used. The heating element may be provided at any suitable location, such as between the vaporizer 306 and the vapor discharge duct 204, within the vapor discharge duct 204. etc. In one particular embodiment, the heating element may be provided in a shunt line between the vaporizer 306 and the vapor discharge duct 204. In some instances, multiple of such heat elements may be used and may be provided at the same location or at different locations within the heating unit 200. Additionally, this heating element may be provided in any other heating unit described herein and is not just limited to the heating unit 200 shown in FIG. 3 A. [0041] FIG. 4 illustrates a method 400 of operating the heating unit 200. The method 400 starts (S402) and condensate is detected (S404). For example, as shown in FIG. 3A. the condensate detector 304 may be configured to detect the condensate 110 in the drip pan 202 and to transmit a condensate detection signal 316 to the controller 302 via the communication line 310.

[0042] FIG. 5A illustrates the controller 302 of the heating unit 200 at a first stage of operation. The controller 302 may include a processor 502 and a memory 504. The processor 502 may be configured to communicate with the memory 504 via a communication line 506, with the condensate detector 304 via the communication line 310, with the discharge fan 308 via the communication line 314, and with the vaporizer 306 via the communication line 312. In certain embodiments, the processor 502 and the memory 504 are illustrated as individual devices. However, in one or more embodiments, the processor 502 and the memory 504 may be combined as a unitary device. Further, in one or more embodiments, at least one of the processor 502 and the memory 504 may be implemented as a computer having tangible computer-readable media for carrying or having computer-executable instructions or data structures stored thereon.

[0043] The processor 502 may be implemented as a hardware processor such as a microprocessor, a multi-core processor, a single core processor, a field programmable gate array (FPGA). a microcontroller, an application specific integrated circuit (ASIC), a digital signal processor (DSP), or other similar processing device capable of executing any type of instmctions, algorithms, or software for controlling the operation of the heating unit 200 in accordance with one or more embodiments described in the present disclosure. The memory⁷ 504 may include data and instructions, including the condensate program 508 stored therein. As will be described in greater detail below, in one or more embodiments, the condensate program 508 may include instructions that when executed by the processor 502 cause the controller 302 to cause the vaporizer 306 to vaporize the collected condensate 110. The condensate program 508 also may include instructions that when executed by the processor 502 cause the controller 302 to additionally cause the discharge fan 308 to force a portion of the vaporized condensate into the main flue 100 via the vapor discharge duct 204.

[0044] Turning back to FIG. 4, at this stage of the method 400, the condensate detector 304 is configured to transmit a condensation detection signal 316 to the processor 502 via the communication line 310. In certain embodiments, the condensation detector 226 may include any known device or system that is configured to detect a presence of a fluid, such as ultrasonic liquid level sensors, float switches, optical sensors, vibrating or tuning fork sensors, capacitance sensors, radar sensors, conductivity or resistance sensors, and the like. The condensate detector 304 may be provided at any suitable location. Additionally, multiple of such condensate detectors 304 (including, for example, combinations of different types of condensate detectors 304 and/or the same types of condensate detectors 304) may be provided as well. [0045] After condensate is detected (S404), the vaporizer may be started (S406). For example, as shown in FIG. 3A, the controller 302 may be configured to transmit a vaporizer start signal 318 to the vaporizer 306 via the communication line 312. As show n in FIG. 5 A, upon receiving the condensation detection signal 316, the processor 502 may be configured to execute instructions in the condensate program 508 to generate and transmit the vaporizer start signal 318 to the vaporizer 306 via the communication line 312. Returning to FIG. 3 A. upon receiving the vaporizer start signal 318, the vaporizer 306 may turn on and start vaporizing the condensate 110 within the drip pan 202. In certain embodiments, the vaporizer 306 may include any known device or system that is configured to convert liquid water into vapor, such as a piezoelectric vaporizer, a mist nozzle, and the like.

[0046] Returning to FIG. 4, after the vaporizer is started (S406), the fan may be started (S408). For example, as shown in FIG. 3A, the controller 302 may be configured to transmit a fan start signal 320 to the discharge fan 308 via the communication line 314. As shown in FIG. 5A, in certain other embodiments, after transmitting the vaporizer start signal 318. the processor 502 may be configured to execute instructions in the condensate program 508 to generate and transmit the fan start signal 320 to the discharge fan 308 via the communication line 314. In these embodiments, the vaporizer 306 may start (S406) prior to the discharge fan 308 starting (S408).

[0047] In some instances, the method 400 may be modified, wherein upon receiving the condensation detection signal 316, the processor 502 may be configured to execute instructions in the condensate program 508 to generate and transmit the fan start signal 320 to the discharge fan 308 via the communication line 314. In these embodiments, the vaporizer 306 and the discharge fan 308 may be started at the same time. More so, in certain embodiments, the method 400 may be modified, wherein after transmitting the fan start signal 320, the processor 502 may be configured to execute instructions in the condensate program 508 to generate and transmit the vaporizer start signal 318 to the vaporizer 306. In these embodiments, the discharge fan 308 may start (S408) prior to the vaporizer 306 starting (S406).

[0048] The vaporized condensate is indicated by arrow 321. The vaporized condensate may mix with air and be blown into the vapor discharge duct 204 as shown by arrow 323. In particular, returning to FIG. 2, the vapor that is blown into the vapor discharge duct 204 may be discharged with the exhaust through the main flue 100.

[0049] Returning to FIG. 4, after the vaporizer and the fan are started (S408), it may be determined whether condensate is detected (S410). For example, as shown in FIG. 3A, the condensate detector 304 may be configured to continue to transmit the condensate detection signal 316 so long as condensate is present in the drip pan 202. At this stage, vapor may be continuously blown into the vapor discharge duct 204 and discharged though the main flue 100.

[0050] In certain embodiments, the condensate detector 304 may be configured to periodically transmit, the condensate detection signal 316 so long as condensate is present in the drip pan 202. The condensate detection signal 316 may be a volume specific signal because the condensate is so variable based on many conditions. However, an example periodicity' may be every 5 seconds or the like. Any suitable time interval may be used herein. In any event, as shown in FIG. 5, so long as the processor 502 continues to receive the condensate detection signal 316. then it is determined that condensate is being detected.

[0051] Returning to FIG. 4, if condensate is detected (Y at S410), then the vaporizer and the fan are configured to continue to operate (S412) and it is again determined whether condensate is detected (return to S410). Alternatively, if condensate is not detected (N at S410), then the vaporizer is configured to stop (S414).

[0052] FIG. 3B illustrates the portion 206 of FIG. 3 A at a second stage of operation. At this stage of operation, the controller 302 is no longer receiving the condensate detection signal 316 from the condensate detector 304. The controller 302 therefore is configured to transmit a vaporizer stop signal 322 to the vaporizer 306 via the communication line 312.

[0053] FIG. 5B illustrates the controller 302 of the heating unit 200 at a second stage of operation. The processor 502 is configured to execute instructions in the condensate program 508 to generate and transmit the vaporizer stop signal 322 to the vaporizer 306 via the communication line 312. Returning to FIG. 3B, upon receiving the vaporizer stop signal 322, the vaporizer 306 is configured to turn off. This may prevent the vaporizer 306 from operating when there is no condensate to vaporize and thus saves power and may extend the life of the vaporizer 306.

[0054] Returning to FIG. 4, after the vaporizer is stopped (S414), the fan is configured to stop (S416). For example, as shown in FIG. 3B, the controller 302 is configured to transmit a fan stop signal 324 to the discharge fan 308 via the communication line 314. As shown in FIG. 5B. in certain embodiments, after transmitting the vaporizer stop signal 322. the processor 502 is configured to execute instructions in the condensate program 508 to generate and transmit the fan stop signal 324 to the discharge fan 308 via the communication line 314. In these embodiments, the vaporizer 306 stops (S414) prior to the discharge fan 308 stopping (S416). In other instances, the method 400 may be modified, wherein upon not detecting condensation, the processor 502 is configured to execute instructions in the condensate program 508 to additionally generate and transmit the fan stop signal 324 to the discharge fan 308 via the communication line 314. In these embodiments, the vaporizer 306 and the discharge fan 308 may be stopped at the same time. More so, the method 400 may be modified, wherein after transmitting the fan stop signal 324, the processor 502 is configured to execute instructions in the condensate program 508 to additionally generate and transmit the vaporizer stop signal 322 to the vaporizer 306. In these embodiments, the discharge fan 308 may stop (S416) prior to the vaporizer 306 stopping (S414).

[0055] Returning to FIG. 4, after the fan is stopped (S416), method 400 stops (S418).

[0056] FIG. 6 illustrates another heating unit 600 in accordance with one or more embodiments of the present disclosure. The heating unit 600 may include the fuel burning water heater 201, the fuel supply line 104, the water supply line 106. the water output line 108, the main flue 100, the drip pan 202, the vapor discharge duct 204, and a vapor discharge duct 602. As will be described in greater detail below, the fuel burning water heater 201 may vaporize the condensate 110 and provide a portion of the vaporized condensate to the main flue 100 via the vapor discharge duct 204 so that the vaporized condensate will be discharged to an outdoor area with the exhaust through the main flue 100. Further, the fuel burning water heater 201 may be configured to provide a second portion of the vaporized condensate to the vapor discharge duct 602.

[0057] Generally speaking, the heating unit 600 differs from the heating unit 200 discussed above with reference to FIGS. 2-5B in that the heating unit 200 is configured to remove the condensate 110 through the main flue 100 via the condensate discharge duct 204, whereas the heating unit 600 is configured to remove part of the condensate 110 through the main flue 100 and to supply the remaining part of the condensate 110 to somewhere else. In some instances, the heating unit 600 may be configured to supply the remaining part of the condensate 110 to a supply side of a forced air system. The remaining part of the condensate 110 may be supplied anywhere, including exhausted to an outdoor area.

[0058] FIG. 7A illustrates a portion 604 of the heating unit 600 at one stage of operation. The portion 604 of the heating unit 600 may include a controller 702, the condensate detector 304, the vaporizer 306, the discharge fan 308, a discharge fan 704, a water conditioning system 706, a flow regulator 708, a flow regulator 710. the communication lines 310, 312, and 314, and communication lines 712, 714, 716, and 718.

[0059] The controller 702 may be configured to communicate with the condensate detector 304 via the communication line 310, with the vaporizer 306 via the communication line 312, with the discharge fan 308 via the communication line 314, with the discharge fan 704 via the communication line 712, with the water conditioning system 706 via the communication line 714. with the flow regulator 708 via the communication line 716, and with the flow regulator 710 via the communication line 718.

[0060] In certain embodiments, the heating unit 600 may be able to remove the condensate 110 by vaporizing the condensate via the vaporizer 306. The discharge fan 308 may blow a portion 727 of the vapor to the vapor discharge duct 204, and the discharge fan 704 may blow a portion 728 of the vapor to the vapor discharge duct 602. The portion 727 of the vapor may enter the main flue 100 via the vapor discharge duct to be discharged to an outdoor area. In some instances, the portion 728 of the vapor may be discharged to another area, such as, for example, into recirculating ductwork of a building to provide humidity. This will be described in greater detail with reference to FIG. 8.

[0061] FIG. 8 illustrates a method 800 of operating the heating unit 600 at a first stage of operation. The method 800 starts (S802) and condensate is detected (S404). For example, as shown in FIG. 7A, the condensate detector 304 may be configured to transmit a condensate detection signal 316 to the controller 702.

[0096] FIG. 9 A illustrates the controller 702 of the heating unit 600 at a first stage of operation. The controller 702 may include a processor 902, a memory 904, and an interface 906. The processor 902 may be configured to communicate with the memory 904 via a communication line 908, with the interface 906 via a communication line 910, with the condensate detector 304 via the communication line 310, with the discharge fan 308 via the communication line 314, with the vaporizer 306 via the communication line 312. with the discharge fan 704 via the communication line 712, with the water conditioning system 706 via the communication line 714, with the flow regulator 708 via the communication line 716, and with the flow regulator 710 via the communication line 718. [0097] In certain embodiments, the processor 902, the memory 904, and the interface 906 are illustrated as individual devices. However, in certain embodiments, at least two of the processor 902, the memory 904, and the interface 906 may be combined as a unitary device. Further, in certain embodiments, at least one of the processor 902, the memory 904, and the interface 906 may be implemented as a computer having tangible computer-readable media for carrying or having computerexecutable instructions or data structures stored thereon.

[0098] The processor 902 may be implemented as a hardware processor such as a microprocessor, a multi-core processor, a single core processor, a field programmable gate array (FPGA), a microcontroller, an application specific integrated circuit (ASIC), a digital signal processor (DSP), or other similar processing device capable of executing any type of instructions, algorithms, or software for controlling the operation of the heating unit 600 in accordance with one or more embodiments described in the present disclosure.

[0099] The memory 904 may include data and instructions, including the condensate program 912 stored therein. As will be described in greater detail below, in certain embodiments, the condensate program 912 may include instructions that when executed by the processor 902 cause the controller 702 to cause the vaporizer 306 to vaporize the collected condensate 110, cause the discharge fan 308 to force a portion of the vaporized condensate into the main flue 100 via the vapor discharge duct 204, and cause the discharge fan 704 to force a second portion of the vaporized condensate into the vapor discharge duct 602. In certain embodiments, the condensate program 912 may include instructions that when executed by the processor 902 cause the controller 702 to cause the water conditioning system 706 to condition the condensate 110. More so. in some embodiments, the condensate program 912 may include instructions that when executed by the processor 902 cause the controller 702 to cause the flow regulator 708 to regulate the amount of vaporized condensate to flow into the vapor discharge duct 602. Further, as will be described in greater detail below, in certain embodiments, the condensate program 912 may include instructions that when executed by the processor 902 cause the controller 702 to cause the flow regulator 710 to regulate the amount of vaporized condensate to flow into the vapor discharge duct 204. [00100] The interface 906 may be any device or system that is configured to enable a user to access and control the processor 902. The interface 906 may include one or more layers, including a human-machine interface (HMI) machines with physical input hardware, such a keyboards and touchscreens and output hardware, such as computer monitors and speakers. Additional user interface (UI) layers in the interface 906 may interact with one or more human senses, including tactile UI (touch), visual UI (sight), and auditory UI (sound). The interface 906 may be located at the water heater or on a mobile device connected thereto.

[00101] At this stage of the method 800, the condensate detector 304 may be configured to transmit a condensation detection signal 316 to the processor 902 via the communication line 310. After condensate is detected (S404), a ratio is set (S804). For example, as shown in FIG. 7A, the controller 702 may set a ratio of the portion of the vapor 727 to be pushed to the vapor discharge duct 204 over the portion of the vapor 728 to be pushed to the vapor discharge duct 602. In some instances, the ratio is stored in the memory 904 as a priori data, wherein the processor 902 is configured to execute instructions in the condensate program 912 to obtain the ratio from the memory 904. In some instances, a user may set the ratio via the interface 906. In these embodiments, the interface 906 may provide the ratio as provided by the user to the processor 902 via the communication line 910. In certain embodiments, a user may change the ratio that is stored in the memory 904 as a priori data via the interface 906. In these embodiments, the interface 906 may cause the processor 902 to execute instructions in the condensate program 912 to cause the processor 902 to overw rite the ratio as a priori data in the memory⁷ 904 with the ratio as provided by the interface 906.

[00102] Returning to FIG. 8, after the ratio is set (S804). the vaporizer may be started (S406). This action may be performed in a manner similar to that as discussed above with reference to FIG. 4. In particular, as shown in FIG. 9A, the processor 902 may execute instructions in the condensate program 912 to cause the processor 902 to transmit the vaporizer start signal 318 to the vaporizer 306 via the communication line 312.

[00103] Returning to FIG. 8, after the vaporizer is started (S406), fans may be started (S806). For example, as shown in FIG. 7A, the controller 702 may be configured to transmit the fan start signal 320 to the discharge fan 308 via the communication line 314 and to transmit a fan start signal 720 to the discharge fan 704 via the communication line 712. As shown in FIG. 9A. the processor 902 may be configured to execute instructions in condensate program 912 to cause the controller 702 to transmit the fan start signal 320 to the discharge fan 308 via the communication line 314 and to transmit the fan start signal 720 to the discharge fan 704 via the communication line 712. In some instances, the processor 902 may be configured to execute instructions in the condensate program 912 to determine at what rate the discharge fan 308 should spin, at what rate the discharge fan 704 should spin, at what amount of air flow the flow regulator 708 should be permit, and at what amount of air flow the flow regulator 710 should permit. For example, in a fuelburning system with a burner, the processor 902 may be configured to execute instructions in the condensate program 912 to track the firing rate of the burner. In some instances, the condensate program may have an a priori correlation between the condensate production as a function of the firing rate. In such instances, the processor 902 may be configured to execute instructions in the condensate program 912 estimate the condensate production rate as a function of firing rate based on the a priori correlation so as to then modulate the discharge fan speed in proportion to the condensate production rate. In embodiments, the processor 902 may be configured to turn off the burner if a condensate reservoir reaches a threshold level of condensate. This may be performed to prevent overflowing of the condensate reservoir.

[00104] Returning to FIG. 8, after the fans are started (S806), a water conditioning system may be started (S808). For example, as shown in FIG. 7A, the controller 702 may be configured to transmit a water conditioning system start signal 722 to the water conditioning system 706 via the communication line 714. As shown in FIG. 9A, the processor 902 may be configured to executed instructions in the condensate program 912 to cause the controller 702 to transmit the water conditioning system start signal 722 to the water conditioning system 706 via the communication line 714. The water conditioning system 706 is configured to condition the condensate 110 based on the water conditioning system start signal 722.

[00105] In certain embodiments, the water conditioning system 706 may include an ultra-violet (UV) light source that is configured to emit UV light toward the condensate 110 within the drip pan 202. The UV light may condition the condensate 110 within the drip pan 202 by killing bacteria, fungus, and viruses that may be present in the condensate 110. That is, the UV light may generally sanitize the condensate 110 within the drip pan 202. In some instances, the water conditioning system 706 may include a caustic solution dispenser that is configured to dispense a caustic solution into the condensate 110 within the drip pan 202. For example, in some instances, the condensate 110 may have an acidic pH. Accordingly, the dispensed caustic solution may increase the acidic pH of the condensate 110 toward a more neutral pH. In some instances, CaCOs media in rock or pellet form may be utilized such that condensate is neutralized as it flows over the media. The pH of the condensate before neutralization is typically in the range of about 2 to 4 and after neutralization it is typically about 5.5 to 7. In still other instances, the water conditioning system 706 may include a combination of a UV light source and caustic solution dispenser as discussed above. The water conditioning system 706 may also include any other type of acid-neutralizing media. Additionally, the acid-neutralizing media may be sized such that the acid-neutralizing media may last the entire lifetime of the water conditioning system 706 without needing to be replaced.

[00106] As shown in FIG. 7A, the vaporized condensate is indicated by arrow 321. The vaporized condensate may mix with air, wherein a portion may be blown into the vapor discharge duct 204, as shown by arrow 727. and a portion may be blown into the vapor discharge duct 602, as shown by arrow 728. In particular, returning to FIG. 6, a portion of the vapor/air mixture may be blown through the vapor discharge duct 204 to be discharged with the exhaust through the main flue 100, whereas another portion of the vapor/air mixture may be blown through the vapor discharge duct 602 to be expelled to another area.

[00107] In certain embodiments, the vapor discharge duct 602 may be configured to supply the portion of the vapor/air mixture blown through the vapor discharge duct 602 to a supply side of a forced air system. In this manner, the heating system 600 may act as a humidifier for the forced air system. The portion of the vapor/air mixture blown through the vapor discharge duct 602 may be supplied anywhere useful or discharged to an outdoor area. [00108] Returning to FIG. 8, after the water conditioning system is started (S8O8). it may be determined whether condensate is detected (S410). This action may be performed in a manner similar to that as discussed above with reference to FIG. 4. If condensate is detected (Y at S410), then the vaporizer, the fans, and the water conditioning system may continue to operate (S810) and it again may be determined whether condensate is detected (return to S410). Alternatively, if condensate is not detected (N at S410), then the vaporizer may be stopped (S414). This action may be performed in a manner similar to that as discussed above with reference to FIG. 4. In particular, FIG. 7B illustrates the portion 604 of FIG. 6A at a second stage of operation, whereas FIG. 9B illustrates the controller 702 of the heating unit 600 during a second stage of operation. For example, as shown in FIG. 9B. the processor 902 may be configured to execute instructions in the condensate program 912 to cause the controller to transmit the vaporizer stop signal 322 to the vaporizer 306 via the communication line 312. As shown in FIG. 7B, upon receiving the vaporizer stop signal 322, the vaporizer 306 may turn off.

[00109] Returning to FIG. 8, after the vaporizer is stopped (S414). the fans may be stopped (S812). For example, the controller 302 may be configured to transmit the fan stop signal 324 to the discharge fan 308 via the communication line 314 and to transmit the fan stop signal 730 to the discharge fan 704 via the communication line 712. As shown in FIG. 9B, after transmitting the vaporizer stop signal 322, the processor 902 may be configured to execute instructions in the condensate program 912 to additionally generate and transmit the fan stop signal 324 to the discharge fan 308 via the communication line 314 and to transmit the fan stop signal 730 to the discharge fan 704 via the communication line 712. In these embodiments, the vaporizer 306 may stop (S414) prior to the discharge fans 308 and 704 stopping (S812).

[00110] In some instances, the method 800 may be modified, wherein upon not detecting condensation, the processor 902 may be configured to execute instructions in the condensate program 912 to generate and transmit the fan stop signal 324 to the discharge fan 308 via the communication line 314 and to transmit the fan stop signal 730 to the discharge fan 706. In these embodiments, the vaporizer 306 and the discharge fans 308 and 706 may be stopped at the same time. The vaporizer 306 and the discharge fans 308 and 706 (or any other vaporizers and/or discharge fans described herein) may be instructed to continue to run for any suitable period of time as well. More so, in some instances, the method 800 may alternatively be modified, wherein after transmitting the fan stop signal 324 and the fan stop signal 730, the processor 902 may be configured to execute instructions in the condensate program 912 to generate and transmit the vaporizer stop signal 322 to the vaporizer 306. In these embodiments, the discharge fans 308 and 704 may stop (S812) prior to the vaporizer 306 stopping (S414).

[00111] Returning to FIG. 8, after the fans are stopped (S812), the water conditioning system may be stopped (S814). For example, as shown in FIG. 7B, the controller 702 may be configured to transmit a water conditioning system stop signal 732 to the water conditioning system 704 via the communication line 714. As shown in FIG. 9B, the processor 902 may be configured to execute instructions in the condensate program 912 to cause the controller 702 to transmit the water conditioning stop signal 732 to the water conditioning system 704 via the communication line 714. Upon receiving the water conditioning system stop signal 732, the water conditioning system 704 may be configured to stop operating.

[00112] Returning to FIG. 8, after the water conditioning system is stopped (S814), method 800 stops (S816).

[00113] FIG. 10 illustrates another heating unit 1000 in accordance with one or more embodiments of the present disclosure. The heating unit 1000 may include the fuel burning water heater 201, the fuel supply line 104, the water supply line 106, the water output line 108, a main flue 1002, the drip pan 202, and the vapor discharge duct 204. As will be described in greater detail below, the fuel burning water heater 201 is configured to vaporize the condensate 110. Further, the mam flue 1002 may include a wide portion 1006, a constricted portion 1010, and a wide portion 1008. The constricted portion 1010 may be disposed between the wide portion 1006 and the wide portion 1008. The vapor discharge duct 204 may be configured to connect to the constricted portion 1010 of the main duct 1002. In this configuration, a Venturi effect at the constricted portion 1010 may create a negative pressure that sucks the vaporized condensate from the vapor discharge duct 204 into the main flue 1002 so that the vaporized condensate will be discharged with the exhaust through the main flue 1002.

[00114] Generally speaking, the heating unit 1000 differs from the heating unit 200 discussed above with reference to FIGS. 2-5B in that the heating unit 200 is configured to remove the condensate 110 by blowing, with the discharge fan 308, the mixture of air/vapor into the main flue 100 via the condensate discharge duct 204, whereas the heating unit 1000 is configured to suck the air/vapor mixture from the condensate 110 into the main flue 1002 via the condensate discharge duct 204 using the Venturi effect.

[00115] FIG. 11 illustrates an enlarged view' of a portion 1012 of the main flue 1002. The wide portion 1006 is configured to pass exhaust gas at a velocity vi and has a cross-sectional pressure pi. In this example, the wide portion 1008 has a similar size and shape to that of the wide portion 1006 and therefore additionally passes exhaust gas at a velocity' vi and has a cross-sectional pressure pi. In other instances, the wide portion 1008 and the wide portion 1006 may be different sizes. The wide portion 1008 and the wide portion 1006 may be any suitable size, shape, or configuration.

[00116] The constricted portion 1010 may include a narrower cross sectional area as compared to wide portion 1006 and wide portion 1008. As a result, the constricted portion 1010 acts as a choke point having a decreased pressure p2 for the exhaust gas from the wider portion 1006. This choke point with a decreased pressure results in an increased velocity V2 in gases passing through the constricted portion 1010 to the wide portion 1008. As a result of the Bernoulli effect, the increased velocity in gas passing through the constricted portion 1010 to the wide portion 1008 creates a negative pressure in the condensate discharge duct 204. This negative pressure in the condensate discharge duct 204 may be used to remove vaporized condensate in the fuel burning water heater 201, as will be described in greater detail below.

[00117] FIG. 12A illustrates a portion 1004 of the heating unit 1000 at one stage of operation. The heating unit 1000 may include a controller 1202, the condensate detector 304, the vaporizer 306, and the communication lines 310 and 312. The controller 1202 may be configured to communicate with the condensate detector 304 via the communication line 310 and with the vaporizer 306 via the communication line 312.

[00118] In accordance with one or more embodiments, the heating unit 1000 may be able to remove the condensate 110 by vaporizing the condensate via the vaporizer 306, wherein a Venturi effect will suck the vapor through the vapor discharge duct 204. The vapor may then enter the constricted portion 1010 of the main flue 1012 via the vapor discharge duct 204 and be discharged to an outdoor area. This will be described in greater detail with reference to FIG. 13.

[00119] FIG. 13 illustrates a method 1300 of operating the heating unit 1000. The method 1300 starts (S1302), condensate is detected (S404), the vaporizer is started (S406). and it is determined whether condensate is detected (S410). These actions may be performed in a manner similar as discussed above with reference to FIG. 4. [00120] FIG. 14A illustrates the controller 1202 of the heating unit 1000 at a first stage of operation. The controller 1202 may include a processor 1402 and a memory 1404. The processor 1402 may be configured to communicate with the memory 1404 via a communication line 1406. In certain embodiments, the processor 1402 and the memory 1404 are illustrated as individual devices. However, in certain embodiments, the processor 1402 and the memory 1404 may be combined as a unitary' device. Further, in one or more embodiments, at least one of the processor 1402 and the memory 1404 may be implemented as a computer having tangible computer-readable media for carrying or having computer-executable instructions or data structures stored thereon.

[00121] The processor 1402 may be implemented as a hardware processor such as a microprocessor, a multi-core processor, a single core processor, a field programmable gate array (FPGA). a microcontroller, an application specific integrated circuit (ASIC), a digital signal processor (DSP), or other similar processing device capable of executing any ty pe of instructions, algorithms, or software for controlling the operation of the heating unit 1000 in accordance w ith one or more embodiments described in the present disclosure.

[00122] The memory 1404 may include data and instructions, including the condensate program 1408 stored therein. As will be described in greater detail below, in one or more embodiments, the condensate program 1408 may include instruction that when executed by the processor 1402 cause the controller 1202 to cause the vaporizer 306 to vaporize the collected condensate 110.

[00123] At this stage of the method 1300, the condensate detector 304 may be configured to transmit the condensation detection signal 316 to the processor 1402 via the communication line 310. Further, the processor 1402 may be configured to execute instructions in the condensate program 1408 to cause the controller 1202 to transmit the vaporizer start signal 318 to the vaporizer 306 via the communication line 318.

[00124] As shown in FIG. 12A, the vaporizer 306 may be configured to start vaporizing the condensate 110 in response to receiving the vaporizer start signal 318. The vaporized condensate is indicated by arrow 321. The vaporized condensate may mix with air and be sucked into the vapor discharge duct 204 as shown by arrow 1204. In particular, returning to FIG. 11, the constricted portion 1010 of the main flue 1012 may create a negative pressure in the vapor discharge duct 204, which sucks the vapor/air mixture through the vapor discharge duct 204. The vapor generated by the vaporizer 306 is then discharged with the exhaust through the main flue 1012.

[00125] Returning to FIG. 13, if condensate is detected (Y at S410), then the vaporizer may continue to operate (SI 304), and it again may be determined whether condensate is detected (return to S410). At this stage, vapor may be continuously pulled through the vapor discharge duct 204 and discharged though the main flue 1012. If condensate is not detected (N at S410), then the vaporizer may be stopped (S414). This action may be performed in a manner as discussed above with reference to FIG. 4.

[00126] FIG. 12B illustrates the portion 1004 of FIG. 12A at a second stage of operation. The processor 1202 is configured to transmit the vaporizer stop signal 322 to the vaporizer 306 via the communication line 312. FIG. 14B illustrates the controller 1202 of the heating unit 1000 at the second stage of operation. The processor 1402 may be configured to execute instructions in the condensate program 1408 to cause the controller 1202 to transmit the vaporizer stop signal 322 to the vaporizer 306 via the communication line 312. As shown in FIG. 12B, the vaporizer 306 is configured to stop operating, as there is no more condensate to vaporize. [00127] Returning to FIG. 13. after the vaporizer is stopped (S414), the method 1300 stops (SI 306).

[00128] FIG. 15 illustrates another heating unit 1500 in accordance with one or more embodiments of the present disclosure. The heating unit 1500 may include the fuel burning water heater 201, the fuel supply line 104, the water supply line 106, the water output line 108, a main flue 1002, the drip pan 202, the vapor discharge duct 204, and the vapor discharge duct 602. As will be described in greater detail below, the fuel burning water heater 201 is configured to vaporize the condensate 110. Further, the main flue 1002 may include the wide portion 1006, the constructed portion 1010. and the wide portion 1008. The constricted portion 1010 may be disposed between the wide portion 1006 and the wide portion 1008. The vapor discharge duct 204 may be configured to connect to the constricted portion 1010 of the main duct 1002. In this configuration, the Venturi effect at the constricted portion 1010 may create a negative pressure that sucks a portion of the vaporized condensate from the vapor discharge duct 204 into the main flue 1002 so that the portion of the vaporized condensate will be discharged with the exhaust through the main flue 1002. Further, the fuel burning water heater 201 may additionally be configured to provide a second portion of the vaporized condensate to the vapor discharge duct 602.

[00129] Generally speaking, the heating unit 1500 differs from the heating unit 1000 discussed above with reference to FIGS. 10-14B in that the heating unit 1000 is configured suck the air/vapor mixture from the condensate 110 into the main flue 1002 via the condensate discharge duct 204 using the Venturi effect, whereas the heating unit 1500 is configured to suck part the air/vapor mixture from the condensate 110 into the main flue 1002 via the condensate discharge duct 204 using the Venturi effect and to supply the remaining part of the condensate 110 to somewhere else. In some instances, the heating unit 1500 is configured to supply the remaining part of the condensate 110 to a supply side of a forced air system.

[00130] FIG. 16A illustrates a portion 1504 of the heating unit 1500 at one stage of operation. The heating unit 1500 may include a controller 1602, the condensate detector 304, the vaporizer 306, the discharge fan 704, the flow regulator 708, the flow regulator 710, and the communication lines 310, 312, 712, 714, 716 and 718. The controller 1602 may be configured to communicate with the condensate detector 304 via the communication line 310, with the vaporizer 306 via the communication line 312, with the water conditioning system 706 via the communication line 714, with the discharge fan 704 via the communication line 712. with the flow regulator 708 via the communication line 716, and with the flow regulator 710 via the communication line 718.

[00131] In accordance with one or more embodiments, the heating unit 1500 may be configured to remove the condensate 110 by vaporizing the condensate via the vaporizer 306. In some instances, a portion 1527 of the vapor may be sucked through the vapor discharge duct 204 via the Venturi effect, and the discharge fan 704 may be configured to blow the portion 728 of the vapor to the vapor discharge duct 602. The portion 727 of the vapor may then enter the constricted portion 1010 of the main flue 1002 via the vapor discharge duct 204 and be discharged to an outdoor area. In some instances, the portion 728 of the vapor may be discharged to another area, for example, into recirculating ductwork of the building to provide humidity.

[00132] FIG. 17 illustrates a method 1700 of operating the heating unit 1500. The method 1700 starts (S 1702), and condensate is detected (S404). This action may be performed in a manner as discussed above with reference to FIG. 4.

[00133] FIG. 18A illustrates the controller 1602 of the heating unit of 1500 at a first stage of operation. The controller 1602 may include a processor 1802. a memory 1804. and the interface 906. The processor 1802 may be configured to communicate with the memory 1804 via a communication line 1806, with the interface 906 via the communication line 910, with the condensate detector 304 via the communication line 310, with the vaporizer 306 via the communication line 312, with the discharge fan 704 via the communication line 712. with the water conditioning system 706 via the communication line 714. with the flow regulator 708 via the communication line 716, and with the flow regulator 710 via the communication line 718.

[00134] In certain embodiments, the processor 1802, the memory' 1804, and the interface 906 are illustrated as individual devices. However, in certain embodiments, at least two of the processor 1802. the memory 1804, and the interface 906 may be combined as a unitary device. Further, in some embodiments, at least one of the processor 1802, the memory 1904, and the interface 906 may be implemented as a computer having tangible computer-readable media for carry ing or having computerexecutable instructions or data structures stored thereon.

[00135] The processor 1802 may be implemented as a hardware processor such as a microprocessor, a multi-core processor, a single core processor, a field programmable gate array (FPGA), a microcontroller, an application specific integrated circuit (ASIC), a digital signal processor (DSP), or other similar processing device capable of executing any type of instructions, algorithms, or software for controlling the operation of the heating unit 1500 in accordance with one or more embodiments described in the present disclosure.

[00136] The memory 1804 may include data and instructions, including the condensate program 1808 stored therein. As will be described in greater detail below, in one or more embodiments, the condensate program 1808 may include instructions that when executed by the processor 1802 cause the controller 1602 to cause the vaporizer 306 to vaporize the collected condensate 110.

[00137] In certain embodiments, the condensate program 912 may include instructions that when executed by the processor 902 cause the controller 702 to additionally cause the water conditioning system 706 to condition the condensate 110. More so, in some instances, the condensate program 912 may include instructions that when executed by the processor 902 cause the controller 702 to cause the discharge fan 704 to force a portion of the vaporized condensate into the vapor discharge duct 602. In other instances, the condensate program 912 may include instructions that when executed by the processor 902 cause the controller 702 to cause the flow regulator 708 to regulate the amount of vaporized condensate to flow into the vapor discharge duct 602. In yet other instances, the condensate program 912 may include instructions that when executed by the processor 902 cause the controller 702 to cause the flow regulator 710 to regulate the amount of vaporized condensate to flow into the vapor discharge duct 204.

[00138] In operation processor 1802 is configured to receive the condensate detection signal 316 from the condensate detector 304 via the communication line 310. After condensate is detected (S404), a ratio may be set (S804). This action may be performed in a manner as discussed above with reference to FIG. 8. After the ratio is set (S804), the vaporizer may be started (S406). This action may be performed in a manner as discussed above with reference to FIG. 4.

[00139] After the vaporizer is started (S406). the fan may be started (S 1704). For example, as shown in FIG. 16A, the controller 1602 may be configured to transmit the fan start signal 720 to the discharge fan 704 via the communication line 712. In one or more embodiments, the processor 1802 is configured to execute instructions in condensate program 1808 to determine at what rate the discharge fan 704 should spin, at what amount of air flow the flow regulator 708 should be permit, and at what amount of air flow the flow regulator 710 should permit. Such system regulation may be performed in a manner similar to that discussed above (see S806).

[00140] Returning to FIG. 17, after the fan is started (S1704), the water conditioning system may be started (S808). This action may be performed in a manner as discussed above with reference to FIG. 8. After the water conditioning system is started (S808), it may be determined whether condensate is detected (S410). This action may be performed in a manner as discussed above with reference to FIG. 4.

[00141] If condensate is detected (Y at S410), then the vaporizer, the fan, and the water conditioning system may continue to operate (S1706) and it again may be determined whether condensate is detected (return to S410). Alternatively, if condensate is not detected (N at S410), then the vaporizer may be stopped (S414). This action may be performed in a manner as discussed above with reference to FIG. 4.

[00142] After the vaporizer is stopped (S414), the fan may be stopped (S1708). FIG. 16B illustrates the portion 1504 of FIG. 16A at a second stage of operation. The controller 1602 may be configured to transmit the fan stop signal 730 to the discharge fan 702. FIG. 18B illustrates the controller 1602 of the heating unit 1500 at a second stage of operation. The processor 1802 may be configured to execute instructions in the condensate program 1808 to cause the controller 1602 to transmit the fan stop signal 730 to the discharge fan 702 via the communication line 712.

[00143] Returning to FIG. 17, after the fan is stopped (S1708), the water conditioning system may be stopped (S814). This action may be performed in a manner as discussed above with reference to FIG. 8. [00144] After the water conditioning system is stopped (814), method 1700 stops (S1710).

[00145] A problem with typical fuel burning heating units that generate condensate is that the condensate may need to be removed. This is typically accomplished by piping the condensate to a nearby sink or drain or through an exterior wall. When such heating units are in a basement, however, such methods of removing accumulated condensate may be difficult and expensive. The present disclosure addresses this issue. For example, in accordance with one or more embodiments, when a fuel burning heating unit produces condensate, the condensate is collected in a drip pan. A vaporizer is used to vaporize the condensate, which is then provided to the existing main flue to be removed with the exhaust of the burned fuel. In this manner, no additional piping through exterior walls or to a nearby drain is needed. [00146] It should be apparent that the foregoing relates only to certain embodiments of the present disclosure and that numerous changes and modifications may be made herein by one of ordinary skill in the art w ithout departing from the general spirit and scope of the disclosure.

[00147] Although specific embodiments of the disclosure have been described, numerous other modifications and alternative embodiments are within the scope of the disclosure. For example, any of the functionality described with respect to a particular device or component may be performed by another device or component. Further, while specific device characteristics have been described, embodiments of the disclosure may relate to numerous other device characteristics. Further, although embodiments have been described in language specific to structural features and/or methodological acts, it is to be understood that the disclosure is not necessarily limited to the specific features or acts described. Rather, the specific features and acts are disclosed as illustrative forms of implementing the embodiments. Conditional language, such as, among others, “can,” “could,” “might,” or “may,” unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain embodiments could include, while other embodiments may not include, certain features, elements, and/or steps. Thus, such conditional language is not generally intended to imply that features, elements, and/or steps are in any way required for one or more embodiments.

Claims

CLAIMS That which is claimed is:

1. A heating unit for use with a fuel supply to supply fuel and a flue to discharge exhaust, the heating unit comprising: a heater configured to generate heat by burning the fuel from the fuel supply, to generate exhaust from the burning of the fuel, and to provide the exhaust to the flue to be discharged; a drip pan configured to collect condensate from the heater; a vaporizer configured to vaporize the collected condensate; and a vapor discharge duct connecting the drip pan to the flue to provide a portion of the vaporized condensate into the flue so as to be discharged with the exhaust.

2. The heating unit of claim 1, further comprising a fan configured to force the portion of the vaporized condensate into the flue so as to be discharged with the exhaust.

3. The heating unit of claim 1, wherein the flue includes a constricted section, and wherein the vapor discharge duct is configured to connect the drip pan to the constricted section so as to enable a Venturi effect to draw the portion of the vaporized condensate through the vapor discharge duct and into the flue so as to be discharged with the exhaust.

4. The heating unit of claim 1, further comprising a resistive heating element configured to prevent the vaporized condensate from returning to a liquid state.

5. The heating unit of claim 4, further comprising a water conditioning system configured to condition the condensate.

6. The heating unit of claim 5, wherein the water conditioning system comprises a pH neutralizing system configured to increase the pH level of the condensate.

7. The heating unit of claim 5, wherein the water conditioning system comprises an ultra-violet light source configured to irradiate the condensate.

8. The heating unit of claim 4, further comprising a regulating system configured to adjust a ratio of the portion of the vaporized condensate provided to the flue and the second portion of the vaporized condensate blown through the second vapor discharge duct.

9. The heating unit of claim 1, further comprising: a condensate detector configured to output a condensate detection signal based on the collected condensate in the drip pan; and a controller configured to receive the condensate detection signal and to instruct the vaporizer to operate based on the condensate detection signal.

10. The heating unit of claim 9, wherein the controller is further configured to instruct the vaporizer to operate for a first predetermined period of time and after a second predetermined period of time after receiving the condensate detection signal.

11. A method of operating a heating unit for use with a fuel supply to supply fuel and a flue to discharge exhaust, the method comprising: generating, via a heater, heat by burning the fuel from the fuel supply; generating, via the heater, exhaust from the burning of the fuel; providing, via the heater, the exhaust to the flue to be discharged; collecting, via a drip pan, condensate from the heater; vaporizing, via a vaporizer, the collected condensate; and discharging, via a vapor discharge duct connecting the drip pan to the flue, a portion of the vaporized condensate into the flue so as to be discharged with the exhaust.

12. The method of claim 11, further comprising forcing, via a fan, the portion of the vaporized condensate into the flue so as to be discharged with the exhaust.

13. The method of claim 11, the discharging of the portion of the vaporized condensate into the flue comprises discharging of the portion of the vaporized condensate through the vapor discharge duct to a constricted section of the flue so as to enable a Venturi effect to draw the portion of the vaporized condensate through the vapor discharge duct and into the flue so as to be discharged with the exhaust.

14. The method of claim 11, further comprising a resistive heating element configured to prevent the vaporized condensate from returning to a liquid state.

15. The method of claim 14, further comprising conditioning, via a water conditioning system, the condensate.

16. The method of claim 15, wherein the conditioning of the condensate comprises increasing, via a neutralizing system, the pH level of the condensate.

17. The method of claim 15, wherein the conditioning of the condensate comprises irradiating, via an ultra-violet light source, the condensate.

18. The method of claim 14, further comprising adjusting, via a regulating system, a ratio of the portion of the vaporized condensate provided to the flue and the second portion of the vaporized condensate blown through the second vapor discharge duct.

19. The method of claim 11 , further comprising: outputting, via a condensate detector, a condensate detection signal based on the collected condensate in the drip pan; receiving, via a controller, the condensate detection signal; and instructing, via the controller, the vaporizer to operate based on the condensate detection signal.

20. The method of claim 18, further comprising instructing, via the controller, the vaporizer to operate for a first predetermined period of time and after a second predetermined period of time after receiving the condensate detection signal.

21. A heating unit, the heating unit comprising: a drip pan configured to collect condensate; a vaporizer configured to vaporize the collected condensate: and a vapor discharge duct connecting the drip pan to a flue to provide a portion of the vaporized condensate into a flue so as to be discharged with an exhaust.