| Patents for F24H 1 - Water heaters having heat generating means, e.g. boiler, flow-heater, water-storage heater (28,567) |
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| 11/19/1991 | US5067170 Electric water warming system |
| 11/14/1991 | WO1991017640A1 Thermo-plastic heat exchanger |
| 11/13/1991 | CN2088668U Vertical horizontal water tube non-pressure tea stove |
| 11/13/1991 | CN2088667U High-efficiency energy-saving series common pressure water heating boiler |
| 11/13/1991 | CN2088666U Coal burning water storage shower device |
| 11/13/1991 | CN2088665U Kettle type magnetized water heater |
| 11/13/1991 | CN2088664U High-efficiency energy-saving quick water heater |
| 11/07/1991 | DE4101704C1 Gasifier heating boiler - has combustion chamber with oxygen feed nozzle assembly and burner with back=up |
| 11/07/1991 | DE4026823A1 Hot water boiler with two heat exchanger - has second heat exchanger to pre-heat combustion air |
| 11/06/1991 | EP0454948A2 Process and apparatus for eliminating acid and heavy metals containing impurities from liquids |
| 11/06/1991 | CN2088217U Rapid electric-heating water-boiler |
| 11/06/1991 | CN2088216U Safety electric water heater |
| 11/06/1991 | CN2088215U Continuous quick-boiling tea-boiler |
| 10/31/1991 | WO1991016576A1 A method of regulating a gas-fired heat-generating appliance, and the relative appliance |
| 10/30/1991 | EP0454550A1 Heat exchanger, in particular for corrosive fluids |
| 10/30/1991 | CN2087758U Low-temp. hot-pipe water heater |
| 10/30/1991 | CN2087757U Domestic coal stove surplus heat warming water-heater |
| 10/30/1991 | CN2087756U Pumpless forced-circulation water heating boiler |
| 10/30/1991 | CN2087755U Heating device for pipeline |
| 10/30/1991 | CN2087754U 自动热水器 Automatic water heater |
| 10/30/1991 | CN2087732U Combined double-bladder multipurpose boiler |
| 10/30/1991 | CN2087590U Coal-fired type hot-tube heating boiler for railway carriage |
| 10/29/1991 | US5060601 Water-tube boiler and a heating installation equipped with such a boiler |
| 10/23/1991 | CN2087312U 电热水器 Electric water heaters |
| 10/23/1991 | CN2087311U Shower with heater |
| 10/23/1991 | CN1055593A Quick electrothermal-film water boiler |
| 10/22/1991 | US5059115 Fuel fired burner |
| 10/22/1991 | CA1291196C Open water heater |
| 10/17/1991 | DE4012203A1 Water heater with one-piece inner container - is flat and has inner container with open ended parallel water chambers insulated from outer case |
| 10/16/1991 | EP0451416A1 An ohmic heater |
| 10/16/1991 | EP0451234A1 Boiler heated by liquid or gaseous fuel. |
| 10/16/1991 | CN2086879U Water heater with automatic fume reducing unit |
| 10/16/1991 | CN2086878U Small water heater with heat-transfer oil |
| 10/16/1991 | CN2086877U Household water heater using solar energy and many other auxilary heat sources |
| 10/16/1991 | CN2086876U Household small-size water heater |
| 10/16/1991 | CN1055419A Pressureless non-expansion water tank hot-water boiler network system |
| 10/16/1991 | CN1055418A Pumpless forced circulation boiler for hot-water heating |
| 10/15/1991 | US5058197 Heater apparatus for fluid medium in a hermetically sealed chamber |
| 10/09/1991 | EP0451097A2 Thermostatically controlled heater for a bidet of a water closet |
| 10/09/1991 | EP0450072A1 Square multi-pipe once-through boiler |
| 10/09/1991 | CN2086397U Vertical down smoke-discharging hot tube heating composite stove |
| 10/09/1991 | CN2086396U Multi-functional fast electric water heater |
| 10/09/1991 | CN2086395U Domestic water-heating unit |
| 10/09/1991 | CN2086394U Fast water-heating unit |
| 10/04/1991 | CA2038856A1 Thermostat-controlled heating device for a bidet of a water closet |
| 10/02/1991 | CN2085932U Electrothermic water warming device |
| 10/02/1991 | CN2085931U Electrothermic household bathtub |
| 10/02/1991 | CN2085930U Waste heat utilizing apparatus capable of storaging waters with different temperatures |
| 10/02/1991 | CN2085929U Shower apparatus with secondary heating type water heating pipe |
| 10/01/1991 | US5054108 Heater and method for deionized water and other liquids |
| 10/01/1991 | US5054107 Radiating lamp fluid heating system |
| 10/01/1991 | US5052347 Water heater construction |
| 10/01/1991 | US5052346 Water heater foam dam and forming method |
| 10/01/1991 | US5052345 Heating apparatus with a heat exchanger |
| 10/01/1991 | CA1289832C Apparatus and method for insulating a water heater |
| 10/01/1991 | CA1289826C Water heater tank construction |
| 09/26/1991 | DE4009486A1 Heating boiler for oil or gas fuel - has firebox partially surrounded by water jacket and turbulence generator fitted to flue |
| 09/26/1991 | DE3941890A1 Direct-transfer heat-exchanger - has liq. flowing downwards in vessel and absorbing heat from flame |
| 09/25/1991 | CN2085510U Water heating boiler |
| 09/25/1991 | CN2085507U Multifunctional high efficient gas heater |
| 09/25/1991 | CN2085506U Honeycomb briquet coiled water heater |
| 09/25/1991 | CN2085505U Water heater for single heating |
| 09/25/1991 | CN2085504U Shower heater using stove |
| 09/25/1991 | CN2085473U Domestic vaporization water heater |
| 09/24/1991 | CA1289427C Liquid-backed gas-fired heating system |
| 09/19/1991 | DE4107938A1 Water geyser with finned block in rectangular shaft - has shaft edges forming end fins parallel to those of finned block |
| 09/18/1991 | CN2085126U Electric heating apparatus for water warming |
| 09/18/1991 | CN2085046U Efficient and energy-saving heating radiator |
| 09/17/1991 | CA1289023C Integral liquid-backed gas-fired space heating and hot water system |
| 09/12/1991 | DE4107361A1 Heat exchanger with composite tubes - has tubes of rectangular cross=section fitted one inside another |
| 09/12/1991 | DE4007621A1 Hot water boiler with burner equipped with fan - has radiant combustion chamber connected to burner outlet |
| 09/11/1991 | EP0445889A1 Combined central-heating and water-heating boiler |
| 09/11/1991 | CN2084591U Household high efficient power saving high temp. water heating stove |
| 09/11/1991 | CN2084590U Hot power recovering water heater |
| 09/06/1991 | WO1991014139A1 Device for indirectly heating fluids |
| 09/06/1991 | CA2077675A1 Device for indirectly heating fluids |
| 09/04/1991 | CN2084181U Smoke-tube type high efficient water heating stove |
| 09/04/1991 | CN2084180U Hot water bath |
| 09/04/1991 | CN2084179U Vertical boiler |
| 09/04/1991 | CN2084178U Water boiling device |
| 09/04/1991 | CN2084177U Water heater for shower |
| 09/04/1991 | CN2084176U Heater for oil heat carrier |
| 09/03/1991 | US5044928 Pulse combustion device |
| 09/03/1991 | US5044705 Insulation structure for appliances |
| 08/28/1991 | CN2083727U Quick setting mould coal heating stove |
| 08/28/1991 | CN2083726U 沼气热水器 Gas water heater |
| 08/28/1991 | CN2083725U Solar-energy coal stove composite water heater |
| 08/28/1991 | CN2083724U Domestic water heater for shower |
| 08/28/1991 | CN2083723U Water heater using central heating pipe line waste heat |
| 08/28/1991 | CN2083722U Wheelchair type composite bathtub |
| 08/27/1991 | CA1288038C Gas burning furnace |
| 08/22/1991 | WO1991012700A1 Apparatus for inductively heating fluid contained in a non-ferromagnetic metal conduit |
| 08/22/1991 | WO1991012470A1 Absorption refrigeration and heat pump system with defrost |
| 08/22/1991 | WO1991012468A1 Boiler |
| 08/21/1991 | EP0442808A1 Electrothermal generator for heating liquids with a strip heating resistor wrapped around the tube |
| 08/21/1991 | EP0442085A1 Electric continuous-flow heater with circuit breaker |
| 08/21/1991 | CN2083376U Double-safety electric heater |
| 08/21/1991 | CN2083272U Pot cover-type water heater |
| 08/20/1991 | US5040697 Water heater construction and sealing device therefor |
| 08/14/1991 | DE4003770A1 Thermally insulated cladding for boilers - consists of corrugated aluminium foil mats with air forming insulation |