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| Number | Title | Issue Date |
| 7823799 | Heat-pump-type water heater A heat source unit includes a compressor, a heat-source-side heat exchanger, an outdoor blower, and a controller for electric devices. A hydrothermal exchange unit accommodates water heat exchangers, water pipes, pumps and a controller, and is connected to the heat ... | 11/02/2010 |
| 7628337 | Secondary heating system A heating system operates in supplemental mode to carry water from a hot water supply of the water heater to a heat exchanger within an air passage in the furnace. A water return passage returns the water from the air passage back to the water heater. Air within the... | 12/08/2009 |
| 7398778 | Solar and heat pump powered electric forced hot air hydronic furnace A furnace in combination with a heat pump and solar panels for providing domestic hot water and forced hot or cooled air utilizing heat pump achieved efficiency levels in an on-demand and unlimited domestic hot water, heating and air conditioning system. In heating ... | 07/15/2008 |
| 7322532 | Hot-water supply apparatus, anti-freezing method thereof, and anti-freezing program thereof A hot-water supply apparatus is an apparatus which has a primary heat exchanger absorbing sensible heat of combustion exhaust and a secondary heat exchanger absorbing latent heat of the combustion exhaust, and improves a freezing prevention function of the hot-water... | 01/29/2008 |
| 7299768 | Gas-fired water heating apparatus The water heating apparatus has an upright cylindrical thermally insulated storage tank, an axially extending exhaust gas pipe passing centrally through the storage tank and a combustion chamber under the storage tank. An atmospheric gas burner, which has a complete... | 11/27/2007 |
| 7258606 | Modular retrofit heating, ventilating and air conditioning system A modular heating, ventilation and air conditioning system including a rectangular sleeve that can be secured through an exterior wall of a building for moving air between an exterior of the building and the interior of the building, an electrical outlet fitted with... | 08/21/2007 |
| 7255287 | Central heating An improved central heating reservoir (42) for use with central heating systems of the type having a boiler and a pump. The reservoir (42) is connected in line and has a liquid inlet (43) offset from an associated liquid outlet (44). Offs... | 08/14/2007 |
| 7234646 | Heat pump hot-water supply system A hot-water supply system heats water through heat exchange between high-temperature refrigerant of a heat pump circuit and water of a water circulating circuit. The system is an instantaneous water heater unit for instantaneously heating, at a water heat exchanger,... | 06/26/2007 |
| 7225995 | Space heating and cooling An air handler operates alternately in (a) a heating state at times when air in a space in a building is at an actual temperature that is insufficient relative to a set temperature and (b) a non-heating state at times when the air in the space is at an actual temper... | 06/05/2007 |
| 7195176 | Temperate water supply system A temperate water supply is provided. The temperate water supply system includes a temperate water storage tank and a heat exchanger. The temperate water storage tank has a first tank inlet, a first tank outlet, a second tank inlet and a second tank outlet. The firs... | 03/27/2007 |
| 7191954 | Method of mixing fluids using a valve A thermostatic mixing valve for the mixing of a first fluid and a second fluid is disclosed. The thermostatic mixing valve is configured to produce a mixed fluid of a particular temperature from a first fluid of a temperature higher than or equal to the particular t... | 03/20/2007 |
| 7131460 | Automotive coolant control valve A coolant flow valve for controlling the distribution and flow of coolant to replace the radiator thermostat and heater valve currently used in automotive applications. The valve includes a valve rotor rotationally received in a valve housing wherein the rotational ... | 11/07/2006 |
| 7073341 | Air conditioner An air conditioner is provided that includes an exhaust heat recovery unit for recovering exhaust heat in a heat transfer medium, a heat transfer medium passage in which the heat transfer medium outputted from the exhaust heat recovery unit flows, an auxiliary heati... | 07/11/2006 |
| 7066396 | Method and apparatus for enhanced heat recovery from steam generators and water heaters A heating system having a steam generator or water heater, at least one economizer, at least one condenser and at least one oxidant heater arranged in a manner so as to reduce the temperature and humidity of the exhaust gas (flue gas) stream and recover a major port... | 06/27/2006 |
| 7055466 | Control system for a portable instant hot water heater A portable instant water heater. Water is delivered to a base unit of the instant hot water heater by a pump that draws water from a reservoir through a flow control valve. The water flows into a pre-heater that wraps around a base of the burner and that is heated b... | 06/06/2006 |
| 7019411 | Energy recovery apparatus and method of operating energy recovering apparatus A system is provided to recover unutilized energy as electric power in hydraulic turbine power generation. The system includes a heat storage tank, a pump for pumping water from the heat storage tank and to air conditioning loads, a first water feed pipe connected b... | 03/28/2006 |
| 7013842 | Water heating chamber system A system that is used for converting polluted gases into a heat source for production of hot water. The system provides a combustion chamber, an incinerator chamber and mixing and/or water-heating chamber all of which are in-line with each other and contained within... | 03/21/2006 |
| 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 |
| 6981651 | Heating system A heating system for a building comprises a boiler and radiators to which hot water is supplied from the boiler, in which at least some of the return water flow from the radiators, typically at 6° C., circulates through a first heat exchanger to cool the exhausting... | 01/03/2006 |
| 6978496 | Portable water heater A portable hot water heater for use during camping, boating, hunting, hiking, fishing, backpacking, etc. The hot water heater advantageously efficiently and rapidly heats large quantities of water for hot showers, cooking and cleaning. The hot water heater includes ... | 12/27/2005 |
| 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 |
| 6929190 | Portable multi-purpose heating unit A multi-purpose heating unit is sized and configured to be used with a variety of attachments or devices to perform various functions such as heating, cooking and providing light. In particular, the multi-purpose heating unit includes a heat source which can be used... | 08/16/2005 |
| 6923148 | Combustion chamber with high temperature protective coating A combustion chamber for a gas-fired hot water heater comprises a top wall which is defined by a bottom wall of an inner tank. A flue extends through the inner tank bottom wall. A circumferential skirt is disposed about the combustion chamber. The combustion chamber... | 08/02/2005 |
| 6877670 | Boiler ventilation system A method of ventilating a boiler system (10) during boiler system outages includes shifting (64) to the ventilation system (11) by stopping (70) the boiler system induced draft fan (32), closing (71) an internal isolation da... | 04/12/2005 |
| 6860430 | Space heating and cooling An air handler operates alternately in (a) a heating state at times when air in a space in a building is at an actual temperature that is insufficient relative to a set temperature and (b) a non-heating state at times when the air in the space is at an actual temper... | 03/01/2005 |
| 6857578 | Combination water heating and space heating apparatus and control therefor A combination water heating and space heating apparatus includes a water heating unit and a space heating unit. The water heating unit has a water storage tank, a heating device for heating water stored in the tank, and a first temperature sensor for sensing water t... | 02/22/2005 |
| 6792201 | Water heating device A water heating device is arranged between a water tank and a water faucet located below the water tank. Water from the water tank flows along a pipeline through the water heating device to the faucet. The water heating device includes a hydroelectric generation sys... | 09/14/2004 |
| 6772712 | Energy system A low-pressure energy system is provided that includes a combustion chamber immersed in water within an insulated container. Low-pressure air flow is introduced into one end of the combustion chamber. Fuel, sparks and water are also introduced to the combustion cham... | 08/10/2004 |
| 6761135 | Multipurpose assembly A combination capable of providing all of the functions of a ground heater and a pressure washer in a more economical, convenient and effective manner by employing and engine, as pump, a generator, a burner, a boiler, a water tank, a float tank, a ground heater hose... | 07/13/2004 |
| 6739517 | Non-circulating tank and kit for use with liquid heating unit A tank for use with a liquid heating vessel of a hydronic radiant heating system to assist in the simultaneous sealing and venting of air from the system where the heating vessel has a flue for release of exhaust, the tank including a liquid holder that is exposed t... | 05/25/2004 |
| 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 |
| 6547153 | Heating and cooling system using frictional air heating A frictional heating system for communicating with an air supply duct to heat and cool air in a building, including an enclosure defining an interior, two air inlets, and at least one air outlet therein communicating with the interior of the enclosure for... | 04/15/2003 |
| 6435420 | Engine waste heat recovering apparatus Since the starting of an engine at a lower temperature is troublesome, the temperature of the engine is measured by a sensor. When the measured temperature is lower than a reference temperature, the pump is first switched on for circulating a thermal medi... | 08/20/2002 |
| 6431124 | Instant portable hot water making bottle A portable vacuum insulated bottle includes a heat source having a minimum volume and a heat pipe which acts as a heat transmitting device. With this construction, a portable vacuum insulated bottle is provided which makes hot water instantly. In particul... | 08/13/2002 |
| 6367703 | Heat recovery system A heating system for a building that includes a furnace having a water jacket surrounding a burner unit. Heated water is circulated from the water jacket to a heat exchange system in the building such as radiators and the water is returned to the water ja... | 04/09/2002 |
| 6354511 | Portable system for heating water The present invention provides an apparatus for heating water. In certain embodiments, the present invention relates to a portable apparatus for heating water that may also be self-contained such that connection to additional sources of fuel or electrical... | 03/12/2002 |
| 6220520 | Manifolds for use in water heat distribution systems A modular manifold includes master modules and possibly also slave modules which each provide a respective terminal unit with a relatively constant rate of water flow at a modulated supply water temperature.... | 04/24/2001 |
| 6202935 | Combined potable water heater and hydronic heating system A combined potable water heater and hydronic heating system including: a water tank for holding hydronic heating water; a flue extending through the tank; a burner below the flue so that heat and exhaust gases generated by the burner pass through the flue to heat t... | 03/20/2001 |
| 6168086 | Dehumidifier A dehumidifier comprising hot and cold water supply pipes interconnected to a showerhead in a bathroom, a hot heat exchanger interconnected to the hot water supply pipe, fan means to pull air from an adjacent room across the hot air exchanger and into the... | 01/02/2001 |
| 6123147 | Humidity control apparatus for residential air conditioning system A system for controlling the humidity with a residential air conditioning system without compressor or air flow control employs a simple control technique of matching inlet air temperature prior to the refrigeration coils of the air conditioning system to... | 09/26/2000 |
