| Patents for F23L 3 - Arrangements of valves or dampers before the fire (255) |
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| 11/10/2005 | US20050247304 Millivolt damper control device |
| 11/10/2005 | US20050247303 Wireless fireplace damper control device |
| 09/01/2005 | DE102004006091A1 Gasbeheiztes Wärmegerät A gas-fired heating appliance |
| 08/11/2005 | US20050175951 Gas-fired heating apparatus |
| 08/07/2005 | CA2494877A1 Gas-fired heating apparatus |
| 07/06/2005 | CN2708122Y Chain grate for preventing coal bucket from being fired by ignition wire shifting forward |
| 05/11/2005 | CN2699143Y Vortex flow rotating smoke abatement air curtain dust removal coal burning horizontal boiler |
| 05/03/2005 | US6887073 Burner assembly with gate valve damper |
| 04/27/2005 | CN2695808Y Coal-fired vertical atmospheric boiler with vortex rotation air curtain for smoke prevention and dust control |
| 04/26/2005 | CA2313857C Method and apparatus for optimizing the combustion air system in a recovery boiler |
| 04/06/2005 | CN1603688A Boiler controlling device and boiler controlling method |
| 02/15/2005 | CA2110372C Removable damper for chemical recovery furnace |
| 01/13/2005 | WO2005003631A1 Improved apparatus and method of operation for burners that use flue gas recirculation (fgr) |
| 12/09/2004 | US20040244791 Air control for a clean burning fireplace |
| 09/23/2004 | WO2004081449A1 Air control for a clean burning fireplace |
| 09/23/2004 | CA2518061A1 Air control for a clean burning fireplace |
| 09/15/2004 | EP1457741A2 Stove with built-in boiler for hot water production |
| 08/17/2004 | US6776609 Apparatus and method of operation for burners that use flue gas recirculation (FGR) |
| 03/04/2004 | WO2004018939A1 Flow regulator |
| 01/21/2004 | CN1135318C Circulating fluid bed steam generator NOx control |
| 01/08/2004 | DE10324634A1 Ofen Oven |
| 12/10/2003 | CN1130520C Device for regulating air flow rate in wall embeded boiler with sealed chamber |
| 10/21/2003 | CA2280666C Combustion air shutoff system for a fuel-fired heating appliance |
| 08/27/2003 | CN1119561C Control valve for coal gas |
| 08/13/2003 | EP0961868B1 A valve device |
| 06/24/2003 | US6582292 Fume hood with rotatable airfoil |
| 06/12/2003 | US20030109211 Fume hood with rotatable airfoil |
| 06/11/2003 | CA2378784A1 Fume hood with rotatable airfoil |
| 11/07/2002 | US20020162519 Gas hot-water-tank air flow control mechanism |
| 11/07/2002 | CA2346802A1 Gas hot water tank air flow control mechanism/device |
| 11/06/2002 | CN1093910C Valve device |
| 09/11/2002 | EP1238218A1 Adjustment body |
| 08/28/2001 | US6279495 Method and apparatus for optimizing the combustion air system in a recovery boiler |
| 08/08/2001 | EP0824649B1 NOx reduction in a circulating fluidized bed |
| 07/24/2001 | CA2220144C Circulating fluid bed steam generator nox control |
| 06/26/2001 | US6250066 Combustor with dilution bypass system and venturi jet deflector |
| 05/03/2001 | WO2001031119A1 Method and apparatus for optimizing the addition of combustion air in a recovery boiler |
| 04/10/2001 | US6213117 Motorized insulated damper assembly for furnace systems |
| 03/14/2001 | EP1083386A1 Burner assembly and burner head for burning fuel/comburent gaseous mixtures |
| 02/27/2001 | US6192930 Valve device |
| 01/30/2001 | US6178737 Combustor dilution bypass method |
| 01/10/2001 | CN1279375A Device for regulating air flow rate in wall embeded boiler with sealed chamber |
| 01/03/2001 | EP1065445A2 Device for regulating the combustion air flow rate of a boiler |
| 09/27/2000 | EP1039223A1 Antivibration control device for the flow regulator damper of combustion air in a burner |
| 09/27/2000 | CN2398522Y Whole body plenum and wind adjusting and blowing device for boiler |
| 09/27/2000 | CN2398521Y Whole body plenum and automatic wind adjusting and blowing device for boiler |
| 09/13/2000 | EP1035376A1 Check valve for use in a gas fired water heater |
| 08/16/2000 | CN1263229A Gas supplying device for high-temp. release burner of furnace and kiln |
| 07/05/2000 | EP1016822A1 Combustion air feeder for high heat release burner of kilns |
| 06/06/2000 | US6070406 Combustor dilution bypass system |
| 03/28/2000 | US6041771 Apparatus and method of automatically regulating intake of air into heating unit |
| 03/21/2000 | CA2282861A1 Apparatus and method of automatically regulating intake of air into heating unit |
| 03/14/2000 | US6035812 Combustion air shutoff system for a fuel-fired heating appliance |
| 02/29/2000 | US6029648 Outside wood-burning furnace |
| 02/23/2000 | EP0981023A1 Burner apparatus having valve means |
| 02/16/2000 | CN1244909A Combustor dilution bypass system |
| 12/08/1999 | EP0961868A1 A valve device |
| 11/16/1999 | US5983930 Air supply valve |
| 10/06/1999 | EP0777839B1 Air supply valve |
| 09/15/1999 | EP0941442A1 Combustor dilution bypass system |
| 09/09/1998 | CN2290767Y Multifunctional combination speed variable burner |
| 08/19/1998 | CN1190696A Valve device |
| 08/13/1998 | WO1998035138A1 A valve device |
| 08/05/1998 | CN1189885A Circulating fluid bed steam generator NOx control |
| 06/04/1998 | WO1998023902A1 Combustor dilution bypass system |
| 02/25/1998 | EP0824649A1 CIRCULATING FLUID BED STEAM GENERATOR NO x? CONTROL |
| 09/17/1997 | CN2262650Y Adjustable high-efficiency air distributor |
| 09/02/1997 | US5662464 Multi-direction after-air ports for staged combustion systems |
| 09/02/1997 | US5662309 Air intake assembly for a combustion fuel burner having an adjustable air intake port |
| 08/26/1997 | US5660125 Circulating fluid bed steam generator NOx control |
| 06/11/1997 | EP0777839A1 Air supply valve |
| 04/30/1997 | CN1148681A Multi-direction after-air ports for staged combustion systems |
| 03/12/1997 | CA2185078A1 Multi-direction after-air ports for staged combustion systems |
| 02/05/1997 | CN1142035A Control valve for coal gas |
| 01/15/1997 | CN2245166Y Oxygen-enriched burner for industrial kiln |
| 11/07/1996 | WO1996035080A1 CIRCULATING FLUID BED STEAM GENERATOR NOx CONTROL |
| 03/07/1996 | WO1996007055A1 Air supply valve |
| 03/07/1996 | CA2198459A1 Air supply valve |
| 04/12/1995 | CN2194458Y Secondary air gate for boiler |
| 02/02/1995 | DE4325239A1 Boiler for burning wood |
| 10/04/1994 | US5351631 Removable damper for chemical recovery furnace |
| 05/03/1994 | US5307745 Removable damper for chemical recovery furnace |
| 03/24/1994 | CA2079529A1 Removable damper for chemical recovery furnace |
| 01/05/1994 | CN2152148Y Adjustable door for air supply |
| 06/15/1993 | CA1319050C High energy combustion air nozzle and method for improving combustion in chemical recovery boilers |
| 04/29/1992 | CN2103099U Household chimney ash cleaner |
| 11/19/1991 | CA1292149C Apparatus for regulating air flow through an air port of a chemical recovery furnace |
| 10/15/1991 | US5056500 Furnace damper means |
| 11/21/1990 | CN2066106U Stove door timing opening and closing unit |
| 11/07/1990 | EP0396293A2 Gas fired appliances and installations incorporating such appliances |
| 07/10/1990 | US4940004 High energy combustion air nozzle and method for improving combustion in chemical recovery boilers |
| 04/26/1990 | DE3836346A1 Flap-controlled air feed to the installation space of a furnace |
| 01/10/1990 | EP0350452A2 Combustion system with air-exhaust-chimney |
| 11/30/1989 | WO1989011622A1 Apparatus for regulating air flow through an air port of a chemical recovery furnace |
| 10/24/1989 | US4875851 Steady state fuel burner assembly for a heat exchanger and method of operating same |
| 06/13/1989 | US4838182 Apparatus for regulating air flow through an air port of a chemical recovery furnace |
| 04/04/1989 | US4818218 For attenuating glass fibers |
| 02/15/1989 | EP0303559A2 Circulation of combustion air to the burner of a burner appliance, for instance of a water heater |
| 11/23/1988 | EP0291583A1 Heating apparatus |
| 07/12/1988 | CA1239083A1 Internal combustion burners |