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| Number | Title | Issue Date |
| 8091514 | Energy re-claimer An energy re-claimer is provided for preheating water prior to the water entering a conventional residential, commercial or industrial gas water heater. The energy re-claimer is mounted on top of the water heater between the draft diverter and the hot air flue. The ... | 01/10/2012 |
| 7415944 | Heat exchanger suitable for a boiler, and a boiler including such a heat exchanger A heat exchanger comprising: gas flow path means for defining a flow path for flue gases from a boiler; liquid flow path means for defining a flow path for a liquid through the heat exchanger; and heat transfer means for transferring heat from the gas in the gas flo... | 08/26/2008 |
| 7363882 | Condensation removal for use with a draft inducer A condensation removal apparatus is disclosed. The condensation removal apparatus is used with a hot water heater wherein the hot water heater produces a fuel exhaust. The fuel exhaust from the hot water heater is provided to a draft inducer through an inlet which i... | 04/29/2008 |
| 7360580 | External flue heat exchangers A heat exchanger is mounted external to a section of flue pipe or is an integral part of a section of flue pipe. The heat exchanger preheats a domestic hot water supply and boosts the return water temperature prior to reentry to the furnace coil. The heat exchanger ... | 04/22/2008 |
| 7360507 | Energy saving apparatus An energy saving apparatus is described. The energy saving apparatus is attached to a standard gas-powered water heater. All gas-powered water heaters typically have an air vent which vents hot air from the water heater. The apparatus takes advantage of this fact by... | 04/22/2008 |
| 7331312 | Waste heat recovery apparatus and method for boiler system An apparatus and method for recovery of waste heat in a boiler system, wherein heat from the hot condensate water in the system, which otherwise would be lost through dissipation, is used for other applications. Particularly, the waste heat energy recovered in the f... | 02/19/2008 |
| 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 |
| 7036463 | Heat exchanger for liquid vaporization A heat exchanger for vaporizing a liquid where provided is a boiler in heat-transferrable contact with a plenum that receives a heated medium. The boiler receives a liquid through a liquid inlet, the liquid being in mist or droplet form. The boiler also receives a t... | 05/02/2006 |
| 7007742 | Method and system for pre-heating water A system and method for pre-heating water prior to entering a hot water heater is disclosed. The system includes: a cold water supply line; an ambient air heat exchange device positioned within an insulated area of a building wherein the ambient air heat exchange de... | 03/07/2006 |
| 6957831 | Nipple for hot water tank conduits A nipple for connection to an outer metal casing of a host water heater for coupling a water conduit to an inner casing of the hot water heater is described. The nipple is a hollow tube having opposed threaded end portions. A thermally insulating sleeve is provided ... | 10/25/2005 |
| 6907846 | Condensing gas boiler having structure of preventing corrosion caused by using heterogeneous metal A condensing gas boiler having a corrosion prevention structure of preventing corrosion caused by using heterogeneous metal is provided, which includes a casing provided with a combustion chamber therein; a present heat exchanger arranged in the casing, which includ... | 06/21/2005 |
| 6886501 | Apparatus and process for heating steam An apparatus for heating steam formed from cooling water in a heat exchanger for hot gas, having a super heater arranged in the heat exchanger vessel, a process for heating steam performed in such an apparatus, and a process for gasification of a hydrocarbonaceous f... | 05/03/2005 |
| 6840199 | Process for heating system A process for heating steam, in which steam is obtained by indirect heat exchange between liquid water and a hot gas; (b) the steam obtained in step (a) is heated by indirect heat exchange with the partly cooled hot gas obtained in step (a); and (c) additional water... | 01/11/2005 |
| 6799538 | Heating apparatus using useless heat for reducing oil An environmentally-friendly heating apparatus which can collect and recover heat of exhaust gas discharged from a boiler in order to use the heat for heating an indoor space. The heating apparatus filters the exhaust gas, using a mist filter formed by vapor generate... | 10/05/2004 |
| 6766772 | Apparatus for heating steam An apparatus for heating steam formed from cooling water in a heat exchanger for hot gas, having a superheater arranged in the heat exchanger vessel; a process for heating steam performed in such an apparatus; and a process for gasification of a hydrocarbonaceous fe... | 07/27/2004 |
| 6672255 | Flue gas energy transfer system A flue gas energy transfer system for increasing the efficiency of hot-water and/or steam boiler. They system utilizes an arrangement of heat transfer ducts with damper elements for the selective diverting exhaust combustion gases. The heat transfer ducts... | 01/06/2004 |
| 6564755 | Preheating assembly for hot water system A heat recovery system includes a heat exchanger surrounding a flue pipe from a furnace for preheating water. The heat exchanger includes a sleeve surrounding the flue pipe to define an annular space and form a water jacket in direct contact with the flue... | 05/20/2003 |
| 6536378 | Apparatus for evacuating condensation from furnace pipe systems An apparatus for evacuating liquid condensation from pipe systems which is particularly applicable to exhaust pipe systems in high efficiency furnaces. The apparatus forms a junction sleeve between two pipes and has drainage channels which prevent condens... | 03/25/2003 |
| 6145139 | Supplementary water heater system for swimming pools and spa An improved swimming pool/spa water heating system whereby a portion of the water flow into the main heater unit (3), is preheated, thereby decreasing the time of operation of the main heater unit (3), to raise the pool water temperature to the desired te... | 11/14/2000 |
| 6021724 | Cyclone furnace for retrofit applications An improved Cyclone furnace particularly suitable for retrofit applications to an existing boiler incorporates a Cyclone furnace and an integrated de-slagging chamber as a single manufactured piece. The Cyclone furnace and the de-slagging chamber are prov... | 02/08/2000 |
| 5852990 | Waste heat boiler A waste heat boiler for cooling a hot process stream includes a plurality of heat exchanging tubes within a cylindrical shell, an outlet chamber for withdrawing the cooled process stream, an insulated by-pass tube having an outlet end in the outlet chambe... | 12/29/1998 |
| 5823175 | Thermal protective barrier A thermal protective barrier is provided for space heating units in the form of a relatively thin panel having an interior volume filled with a non-combustible liquid (water and/or antifreeze mix, etc.). Two of the embodiments are flat and are adapted to ... | 10/20/1998 |
| 5730088 | Heat recovery steam generator Heat recovery apparatus for extracting heat from a hot flue gas stream especially useful on a marine vessel. The apparatus includes a housing having opposite outer end walls, opposite outer side walls, a top wall and a bottom wall with a heat exchanger ex... | 03/24/1998 |
| 5626102 | Heat recovery system for a boiler and a boiler provided therewith A heat recovery system for a boiler has a tank separator connectable to a boiler and receiving a liquid from the boiler as well as separating the liquid into a blow down liquid and a flush vapor, a heat exchanger having an upstream portion and a downstrea... | 05/06/1997 |
| 5577661 | Pool water heating and circulating system A pool heating and circulating system incorporates an internal combustion engine that drives a pump for developing a flow of water. The internal combustion engine has associated therewith an exhaust pipe which is connected to a heat exchanger. An outlet o... | 11/26/1996 |
| 5560209 | Arrangement for improving efficiency of a power plant A device for increasing efficiency of a power plant operated by burning fossil fuel has a boiler for heating a process medium. An inlet line is connected to the boiler for feeding a first process gas in the form of combustion air into the boiler. An outle... | 10/01/1996 |
| 5452686 | Waste heat boiler Waste heat boiler comprising within a cylindrical shell a plurality of heat exchanging tubes having an inlet end and outlet end; attached to the shell, means for introducing water on shellside of the tubes; means for introducing a hot process stream into the i... | 09/26/1995 |
| 5406934 | Heat recovery apparatus for use with a non-high efficiency furnace A heat recovery apparatus for increasing the efficiency of a furnace having a cold air return, a burner, a hot air outlet, and a hot air exhaust. The heat recovery apparatus comprising a finned coiled heat exchanger located in the exhaust and having a wat... | 04/18/1995 |
| 5347958 | Heat recovery apparatus and an improved heat recovery method An apparatus for recovering heat, and a flue gas recovery and/or recirculation and/or induced draft apparatus for boilers. The apparatus for recovering heat may be used in combination with the flue gas recovery and/or recirculation and/or induced draft ap... | 09/20/1994 |
| 5305954 | Heating systems A heating system comprises an oven located above a solid fuel stove, a chimney for receiving combustion gases from the solid fuel stove, and a heat exchanger in the chimney for transferring heat from the combustion gases to a flow of water. A heat exchang... | 04/26/1994 |
| 5299534 | Single-drum recovery boiler A single-drum recovery boiler comprising a superheater (2), boiler bank elements (3a) forming a boiler bank, and elements (3b) forming an economizer. In the recovery boiler, a plurality of boiler bank elements (3a) and economizer elements (3b) are dispose... | 04/05/1994 |
| 5273002 | Water tube boiler A water tube boiler comprises a furnace having a burner and a vertical flue gas stack located to one side of the furnace. A convection tube assembly is arranged in the stack for the recovery of heat from flue gases passing through the flue gas stack. With... | 12/28/1993 |
| 5129331 | Emissionless furnace boiler system An apparatus for separating and recovering effluent gases from a furnace includes a pressure vessel for containing the gases. This vessel has a fluid input for receiving the gases and a fluid output for selectively removing the gases when they are separat... | 07/14/1992 |
| 5109807 | High output mini hydronic heater An efficient compact modulating or fixed firing rate hydronic heater is provided. A slotted single piece baffle encloses the heat exchange surface which is a wound finned tube, and improves gas flow contact with the heat exchange surface, thereby increasi... | 05/05/1992 |
| 5097801 | Waste energy hot water heater A waste energy hot water heater which extracts heat energy through heat exchange with flue gas from a primary heating device is disclosed. The water heater has an easily removable, compact, and simple heat exchanger and a flue gas bypass system to avoid o... | 03/24/1992 |
| 5052345 | Heating apparatus with a heat exchanger A heating apparatus including a burner and a heat exchanger wherein the burner supplies a primary fluid and exhaust gas to the heat exchanger. Secondary fluid supplied to the heat exchanger is first heated within the heat exchanger by the primary fluid an... | 10/01/1991 |
| 5029442 | Heat feeding apparatus for internal combustion engine having supercharger attached A heat feeding apparatus employable for an internal combustion engine having a supercharger attached thereto, the apparatus including a compressed air bypass passage opening/closing valve disposed midway of a compressed air bypass passage by way of which ... | 07/09/1991 |
| 5027720 | Emissionless furnace boiler system An emissionless furnace boiler and effluent gas recovery system includes a pressure vessel having a fluid input and fluid output. The system is capable of maintaining an entropy characteristic equal to at least the condensing pressure of the lowest entrop... | 07/02/1991 |
| 5005542 | Engine preheating device An engine preheating device for heating internal combustion engines prior to operation utilizes a propane torch and conventional propane supply tank. A hollow cylindrical housing is supported in upright orientation by a plurality of circumferentially spac... | 04/09/1991 |
| 4971025 | Gas-powered apparatus for producing warm water and for heating an enclosed space This gas-powered apparatus comprises a substantially cylindrical combustion chamber having an inlet for the combustion air connected to the outside and an upper outlet connected to a burned gas flue. A tank is arranged around the combustion chamber and de... | 11/20/1990 |
