| Patents for F24D 3 - Hot-water central heating systems (9,097) |
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| 08/22/1991 | WO1991012466A1 Heatable wall |
| 08/14/1991 | CN2082817U Cooking range with additional shower warming device |
| 08/08/1991 | WO1991011664A1 Water heating arrangement |
| 08/07/1991 | CN1053672A Single-pipe back-flowing and branched heat-supplying method |
| 07/30/1991 | CA1286945C Device for ventilating a closed conduit system |
| 07/25/1991 | DE4001241A1 Pipe clip for fixing and heating pipes to industrial floors - comprises revolving clamp and fastener with a holder for reinforcement and cross shaped middle section |
| 07/23/1991 | US5033673 Hot water circulating system |
| 07/23/1991 | US5033361 Ventilation equipment |
| 07/23/1991 | CA1286569C Fill valve for a water heating system |
| 07/20/1991 | WO1991010866A1 Prefabricated tile for an underfloor-air-conditioning system |
| 07/20/1991 | CA2050469A1 Prefabricated tile for an underfloor-air-conditioning system |
| 07/17/1991 | CN2081053U Hot water circulator for indigenous central heating |
| 07/16/1991 | US5031940 Water supply elbow within a plastic housing comprising three or more parts, connectable to plastic conductors with a plastic spiral covering of varying diameters |
| 07/04/1991 | DE4031483A1 Two-panel wall cladding section - has heat insulating layer and heating pipe between panels |
| 07/03/1991 | CN1013065B Control method for providing heat energy of heat energy transfering apparat |
| 06/26/1991 | EP0433869A1 Precast wall with thermic regulation elements |
| 06/20/1991 | DE3941618A1 Heating or cooling room - involves prefab. heat transfer unit having hot water pipes pressed against its room-side cover plate |
| 06/13/1991 | WO1991008423A1 Partitioned hot water tank |
| 06/13/1991 | WO1991008422A1 Fluid-containment vessel |
| 06/11/1991 | US5022459 Flexible hose heat exchanger construction with combination locating and thawing wire |
| 06/05/1991 | EP0430309A2 Combination valve for feed conduit |
| 06/05/1991 | EP0430074A1 Heat transmission duct particularly for heating systems embedded in a hardened transmission medium |
| 05/23/1991 | DE3938596A1 Panel of sandwich construction for wall, floor or ceiling - has edges of increased thickness with recess between them |
| 05/21/1991 | US5016856 Inflatable bladder for control of fluid flow |
| 05/16/1991 | WO1991006811A2 Direct surface heating/cooling installation |
| 05/15/1991 | EP0427655A1 Central heating installation |
| 05/14/1991 | US5014770 Attic solar energy vehicle |
| 05/08/1991 | CN2076649U Household central heating pump |
| 05/08/1991 | CN1051238A Multi-functional energy-saving stove |
| 05/08/1991 | CN1051122A Energy-saving pot |
| 05/02/1991 | WO1991005977A1 A heat pump system having a refrigerant circuit in the form of an exchangeable unit, and means for effecting such an exchange |
| 05/02/1991 | DE3936332A1 Direkt - flaechenheizungs/kuehlungsanlage Direct - flaechenheizungs / kuehlungsanlage |
| 05/01/1991 | CN2076212U Vacuum enclosed gas hot-water central heating system |
| 04/23/1991 | US5010234 Device for air-conditioning premises with exchange of heat energy by low temperature infrared radiation |
| 04/16/1991 | US5007583 Device for accomodating expansion in fluid circulation systems |
| 04/11/1991 | DE3932972A1 Cooling or heating element - using air or water in channels of core between two cover layers |
| 04/10/1991 | CN2074878U High-efficient coal-saving dust-proof multi-purpose series fire stove |
| 04/04/1991 | DE4005659A1 Fixing clip for surface heating pipes - is designed with barbed and pointed ends to make hole as small as possible in insulation lagging |
| 04/04/1991 | DE3931805A1 Two-armed bracket clamp on baseplate - has angled base strips on plate underside, with guide arms and guide slot |
| 04/03/1991 | EP0420220A1 Installation for the heating or cooling of fluids |
| 04/03/1991 | CN2074431U Combined 'kang'-heating panel |
| 03/27/1991 | EP0419417A2 Vehicle and in particular transportation vehicle with emergency central heating plant installed on it |
| 03/27/1991 | CN2073994U Pressureless running water circulation control device of boiler |
| 03/21/1991 | WO1991003688A1 A pump module |
| 03/13/1991 | EP0416733A2 Heat exchanger |
| 03/13/1991 | CN1049888A Concrete flooring base and construction method thereof |
| 03/06/1991 | EP0415260A1 Heating and/or boiler distributor |
| 03/05/1991 | US4996970 Heated sleeping bag ground pad |
| 02/28/1991 | DE3928074A1 Storage system reducing risk of legionella in hot water systems - in which water circulates continuously from storage tank to water heater and mixing of waters of different temps. is prevented |
| 02/27/1991 | CN1049553A Free of pressure hot water heating system with laminal feed and spontaneous return |
| 02/19/1991 | US4993630 System for tempering spaces of a building |
| 02/14/1991 | DE4018632A1 Reinforced concrete floor or roof - has reinforcing rods bent in zigzag and arranged in form of cage |
| 02/14/1991 | DE3926672A1 Concrete floor with flexible joint between panels - has tubular guides to support pipe embedded in panels and deflecting to accommodate relative movement |
| 02/12/1991 | CA1280101C Heating method and apparatus |
| 02/06/1991 | CN2070879U High efficient energy saving stove using circulating water method for living and warming |
| 02/05/1991 | US4990746 Electric water heater utilizing trapped air to provide expansion space |
| 02/05/1991 | CA1279833C Tank made up of two half shells, useable as an expansion chamber, expansion compensator, or pressurized reserve fluid container |
| 01/31/1991 | DE4027833A1 Building heating and cooling circuit - directs fresh air through chambers in ceilings containing heat-transfer pipes |
| 01/31/1991 | DE4009583A1 Suspended ceiling with layer of plaster - in which pipes are embedded for circulation of heating or cooling medium |
| 01/24/1991 | DE3923408A1 Lightweight construction for insulated chambers - in which tubes supporting the chamber walls also carry heat exchange fluid for heating or cooling the chamber contents |
| 01/23/1991 | EP0408788A1 Device consisting of a heat exchanger with integrated heat accumulator for domestic hot water supply |
| 01/16/1991 | CN2069536U Non-pressure central heating device |
| 01/09/1991 | EP0406476A2 False ceiling |
| 01/09/1991 | CN2069077U Stove with additional provisions for heating water |
| 01/08/1991 | CA1278684C Method and apparatus for heating a large building |
| 01/02/1991 | CN2068657U Household gas forced cycling hot water heating apparatus |
| 01/02/1991 | CN2068656U Automatic water feeder of hot water heating system |
| 12/28/1990 | WO1991000488A1 Method and apparatus for heat exchange, where channels, e.g. tubes, are secured in recesses in heat-isolating boards |
| 12/28/1990 | CA2062813A1 Method and apparatus for heat exchange where channels, e.g. tubes, are secured in recesses in heat-isolating boards |
| 12/26/1990 | CN2068209U Multi-functional domestic water heater |
| 12/20/1990 | DE3919862A1 Hollow casing for building construction - has tubing inside casing to provide cooling or heating system |
| 12/19/1990 | EP0403326A1 Warm water storage heater and installation equipped with such a storage heater |
| 12/13/1990 | DE3919143A1 Heat exchanger for heating or cooling room - is made from sheet metal with internal passages for cooling medium |
| 12/12/1990 | EP0401237A1 A heat installation for premises with water as a heat transmitting medium. |
| 12/06/1990 | DE3917873A1 Heating plate esp. for forming floor or inner wall heating - has one or more heating coils under top surface covering in meander running channels |
| 12/05/1990 | CN1047562A Micropressure boiler hot water and heating system |
| 11/29/1990 | WO1990014566A1 Refrigeration and freezing plant |
| 11/29/1990 | DE4014712A1 Heat storage unit combined with heating plant - includes four-way mixer to control circulation and hot water storage in conjunction with other valves |
| 11/29/1990 | DE3917152A1 Heating layout with normal flow and return - is equipped with one or more additional flow and return pipes fitted inside original flow and return pipes |
| 11/29/1990 | CA2017685A1 Hot water tanks and installations equipped with such tanks |
| 11/22/1990 | DE4015474A1 Concrete floor for building - is supported by parallel tubular structural elements |
| 11/16/1990 | CA2016552A1 Concrete flooring base and construction method thereof |
| 11/07/1990 | CN2065295U Combination heating thermodynamic plant |
| 10/31/1990 | DE4013898A1 Pressure maintaining station for water heating plant - comprises water-tight safety valve in air venting tube |
| 10/31/1990 | DE4013897A1 Hot water heating plant - has degasser pressure maintaining station with equalising vessel diaphragm penetrating level tube |
| 10/24/1990 | CN2064478U Gas heating equipment |
| 10/16/1990 | US4963780 Water driven generator for sanitary domestic installation |
| 09/25/1990 | US4958958 Subterranean heat insulated pipe system with a bending, and a method of establishing such a system |
| 09/20/1990 | DE3908108A1 Large-area radiant heating system for ceilings and walls |
| 09/19/1990 | EP0387633A2 Heat transport installation for heating or cooling purposes |
| 09/13/1990 | DE3907811A1 Bottom insulation which is laminated on at least one side, having a special laminated-on sheet |
| 09/13/1990 | DE3907810A1 Fastening element for heating tubes of an underfloor heating system for laying on pre-perforated rails or plates |
| 09/13/1990 | DE3907271A1 Fastening element for heating tubes of an underfloor heating system for laying on heat-insulating panels covered on at least one side, consisting of an anchoring part, an inner tube receptacle and a depth stop |
| 09/13/1990 | DE3907110A1 Heating system for closed rooms |
| 09/13/1990 | DE3906939A1 Method for laying flexible plastic pipes |
| 09/05/1990 | EP0385700A1 Heat exchange unit, heat exchange system, method of improving heat exchange efficiency, and refrigeration circuit |
| 09/05/1990 | EP0385148A1 Concrete floor with heating tubes and method for laying heating tubes for a concrete floor |
| 08/29/1990 | EP0384423A1 Hot water accumulator with a heat exchanger for sanitary water as well as an exterior heating element and a distributor for the inflowing water |
| 08/29/1990 | EP0302083B1 Mixer valve for heating plant |
| 08/29/1990 | CN2061257U Micropressure boiler hot water heater |