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| Number | Title | Issue Date |
| 8176881 | Systems and methods for controlling a water heater A control for a water heater is provided that comprises a pressure switch for sensing a predetermined level of airflow sufficient for maintaining proper burner operation, and a temperature sensing means for sensing the temperature of the water in the tank. The contr... | 05/15/2012 |
| 7798107 | Temperature control system for a water heater A system for detecting stacking and controlling temperature in a water heater. A controller with a connection to a temperature sensor and heating element in a water tank of the heater may be designed to limit stacking and its effects. The controller may use a sensin... | 09/21/2010 |
| 7513221 | Water heater with pressurized combustion A water heater includes a sealed combustion chamber and one or more fans for raising pressure in the combustion chamber to increase efficiency of the water heater. The pressure permits a more restrictive baffle to be used in the flue compared to baffles used in atmo... | 04/07/2009 |
| 7503287 | System, method and apparatus for heating water Disclosed are a water heating system, a method of heating water and a water heating apparatus for use in providing successive volumes of heated water at a generally consistent temperature. In one aspect of the disclosure, a water heating system includes a reservoir ... | 03/17/2009 |
| 7438023 | Heating device having a thermal cut-off circuit for a fuel line and method of operating the same A thermal cut-off circuit for a gas-fired device and method of operating the circuit. The thermal cut-off circuit includes a thermal cut-off switch and an ambient thermal switch. The thermal cut-off switch is positioned in a combustion chamber and the ambient therma... | 10/21/2008 |
| 7434544 | Water heater with dry tank or sediment detection feature One or more embodiments of a controller for controlling a fuel-fired water heater are provided that are able to detect a high rate of temperature change condition in the water heater tank. The fuel fired water heater appliance having a water storage vessel comprises... | 10/14/2008 |
| 7380522 | Energy saving water heater A water heater including a water reservoir container having a cold water inlet and a hot water outlet, a combustion chamber adjacent the water container, a burner associated with the container; a temperature probe associated with the container that detects a water t... | 06/03/2008 |
| 7337517 | Method of manufacturing a combustion chamber for a water heater A method of manufacturing a combustion chamber for use in a water heater is provided. A skirt is formed, and an edge portion of a plate is spot welded to the skirt. The edge portion of the plate is circumferentially welded to the skirt, thereby forming a seal betwee... | 03/04/2008 |
| 7337753 | Water heater The water heater includes a burner and a water tank. Combustion products flow upwardly around the tank through a combustion products path where heat transfer to water in the tank occurs, the path being defined between the outer wall of the tank and a surrounding hea... | 03/04/2008 |
| 7290503 | High efficiency, wet-base, downfired multi-pass water heater A fuel-fired water heater has a three-pass condensing type heat exchanger disposed within its tank and having a central vertical first pass flue pipe separated into upper and lower portions by an internal dividing structure. Respectively coupled to the upper and low... | 11/06/2007 |
| 7284710 | Heating system A heat management system is capable of managing unlimited hydronic heat sources and unlimited heating zones, each located within a desired area and each controlled by temperature sensors. The system uses plural system heating sources to heat a heating solution (pref... | 10/23/2007 |
| 7167813 | Water heater performance monitoring system A water heater performance monitoring device for monitoring whether a water heater is functioning optimally or whether it requires service. The device uses maximum heating rates taken from a plurality of measured heating rates to determine if the performance of the ... | 01/23/2007 |
| 7096828 | Self cleaning boiler and steam generator A steam generator boiler for generating steam is connected to a supply conduit for supplying water to the boiler with a supply valve for controlling the supply of water through the supply conduit. A heater supplies heat to the boiler for generating steam with a disc... | 08/29/2006 |
| 7007858 | Compact boiler with tankless heater for providing heat and domestic hot water and method of operation A small and compact boiler for providing hot water for indoor heating and domestic hot water and method of operation are provided. The boiler includes a three way valve configured to circulate boiler water through a heating circuit when indoor heat is required, and ... | 03/07/2006 |
| 6957629 | Water heater flue with improved heat transfer A water tank has a central flue to which clips are welded. The clips define baffles and are welded to have a greater heat transfer area where they are joined to the central flue. The individual clips are rectangular and are welded to the flue wall along one side at ... | 10/25/2005 |
| 6955301 | Water heater and control An improved heater and method of controlling the same is provided. The water heater has the combination of a tank for holding water, a heater for heating the water, a controller having logic to regulate the heater, and first and second sensors. Each of the sensors d... | 10/18/2005 |
| 6938581 | Supplemental water heater tank and system A supplemental water heater tank and system features a supplemental tank with an inner vessel surrounded by an outer jacket. The space there between is generally evacuated of air so that the inner vessel is vacuum insulated. The supplemental tank includes water inle... | 09/06/2005 |
| 6880493 | Gas water heater and method of operation A gas water heater with a tank for holding water including a gas valve mounted below the tank and in fluid communication with a supply of gas. A gas burner is fluidly connected to the gas valve. A first temperature sensor is mounted adjacent a lower portion of the t... | 04/19/2005 |
| 6877462 | Sensorless flammable vapor protection and method A water heater control system that prevents the accumulation and accidental ignition of dangerous quantities of unwanted flammable vapors. The system intermittently generates a spark at a predetermined interval such that if unwanted flammable vapors are present, the... | 04/12/2005 |
| 6694926 | Water heater with continuously variable air and fuel input A water heater apparatus includes a water conduit having an inlet and an outlet. A primary heat exchanger has a water side defining a portion of the water conduit. A burner is operatively associated with the primary heat exchanger for heating water in the... | 02/24/2004 |
| 6648235 | Control method of thermostatic system A control method of a thermostatic system for a hot water heater is provided where when the water temperature in the hot water heater is too large, a first electromagnetic valve is controlled to be open and a second electromagnetic valve is controlled to ... | 11/18/2003 |
| 6612267 | Combined heating and hot water system A combination domestic hot water and space heating system has an instantaneous domestic hot water heat exchanger and a low mass boiler-type heat generator connected in a series by a boiler water flow circuit containing a circulating pump. The boiler-type ... | 09/02/2003 |
| 6606968 | Water heater unit There is provided a water heater unit realizing antifreezing of a water tube and the like of a heat exchanger without providing a backwind stopper on an exhaust tube. The water heater unit comprises a heat exchanger for heating water by a combustion heat ... | 08/19/2003 |
| 6604491 | Boiler apparatus Disclosed is a boiler apparatus useful for the heating of living and working spaces. The disclosed boiler apparatus incorporates a burner element and controller element that cooperate to provide a modulated firing rate. The modulated firing rate serves to... | 08/12/2003 |
| 6591788 | Rooftop water heater A water heater adapted to be mounted on the rooftop of a building includes a substantially cylindrical tank having a horizontally-oriented longitudinal axis. A U-shaped flue tube has a burner end and an exhaust end, both ends being mounted in a head porti... | 07/15/2003 |
| 6553946 | Multi-function water heater control device A single control device is operational to control the flow of gas to a water heater as well as to protect against excessive temperature and pressure. The control device requires only a single fitting to be attached to the water heater tank to expedite the... | 04/29/2003 |
| 6293230 | Water heaters with flame traps A gas water heater including a water container adapted to be heated by a gas burner; and an enclosure surrounding the burner, the enclosure having at least one entryway adapted to allow air and fumes to enter the enclosure without igniting flammable gases... | 09/25/2001 |
| 6283067 | Potable water temperature management system A potable water temperature management system includes a device that produces waste heat and that has a primary purpose other than heating potable water. The waste heat from the device is used to heat potable water in a tank. A heat shedding system is act... | 09/04/2001 |
| 6237544 | Water heater and gas burner A water heater includes a tank 10 arranged inside a casing 20 with a burner 16 below the tank so that a heat exchange zone 15 surrounding the tank receives the combustion products. The tank 10 is supported on three edge contact projections 26 resting on l... | 05/29/2001 |
| 6237586 | Heater trough apparatus A heater trough apparatus for heating water used for cleaning. The heater trough apparatus includes a tank mounted upon a plurality of leg members each having an adjustable feet member threaded through a bottom thereof, the tank having side walls, end wal... | 05/29/2001 |
| 6131536 | Infrared and gas fluid heater system An instantaneous fluid heating system includes a fluid source, a use point for intermittently demanding fluid from the fluid source, an instantaneous IR gas heater, and a temperature sensor positioned external to the heater. The instantaneous IR gas heate... | 10/17/2000 |
| 6055944 | Heating device A storage water heater including a vessel for accumulating a volume of water which is to be heated, said vessel having water inlet and outlet means, at least one gas burner, an exhaust gas outlet and a temperature regulating device. In order to evaluate t... | 05/02/2000 |
| 6053130 | Power vent water heater with electronic control system A water heater of the invention includes a water container; a combustion chamber adjacent the water container; a burner associated with the combustion chamber; a flue connected to the combustion chamber; a blower assembly positioned to receive combustion ... | 04/25/2000 |
| 5941200 | Gas-fired water heater having plate-mounted removable bottom end burner and pilot assembly A fuel-fired water heater has a combustion chamber disposed beneath the storage tank portion of the water heater. The bottom side wall of the combustion chamber is defined by an annular perforated wall structure with a perforated mounting plate structure ... | 08/24/1999 |
| 5924390 | Water heater with co-located flue inlet and outlet A blower draws air through an inlet duct from outside a building or dwelling and injects air and fuel into a sealed combustion chamber where they are ignited and burned within a ceramic crucible within combustion chamber. The pressurized combustion gases ... | 07/20/1999 |
| 5620016 | Fuel control device, parts therefor and methods of making the same A fuel control device, parts therefor and methods of making the same are provided, the control device comprising a housing having a shank portion for interconnecting with a spud carried by a hot water tank construction, the shank portion comprising a flan... | 04/15/1997 |
| 5357907 | Water heater with reduced localized overheating A water and/or space heater is provided in which water is circulated to prevent the localized overheating or vaporization thereof.... | 10/25/1994 |
| 5305418 | Water heater tank arrangement control device and shaft extension therefor and methods of making the same A water heater tank arrangement, control device and shaft extension therefor and methods of making the same are provided, the water heater tank arrangement comprising a water heater tank having a heating unit therefor, a control device carried by the tank... | 04/19/1994 |
| 5233970 | Semi-instantaneous water heater with helical heat exchanger A semi-instantaneous water heater is disclosed. The water heater generates domestic hot water by transferring heat from the circulating fluid of a modulating boiler. It is particularly suited for use in a combination system, which provides both space and ... | 08/10/1993 |
| 5199385 | Through the wall vented water heater The present invention provides a water heater capable of exhausting flue gases from an interior space of a building to an exterior space and is adapted for installation through an upstanding wall. The water heater has an insulated tank with a water inlet ... | 04/06/1993 |
