F23L1/00	7	Passages or apertures for delivering primary air for combustion&#160; (baffles or deflectors in air inlets&#160;F23M9/02)	F23L1/00	F23L1/00		1746
F23L1/02	8	by discharging the air below the fire	F23L1/02	F23L1/02		1051
F23L3/00	7	Arrangements of valves or dampers before the fire	F23L3/00	F23L3/00		638
F23L5/00	7	Blast-producing apparatus before the fire	F23L5/00	F23L5/00		193
F23L5/02	8	Arrangements of fans or blowers	F23L5/02	F23L5/02		1511
F23L5/04	8	by induction of air for combustion, e.g. using steam jet	F23L5/04	F23L5/04		235
F23L7/00	7	Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam	F23L7/00	F23L7/00		752
F23L7/002	8	{Supplying water}	F23L7/00	F23L7/00		431
F23L7/005	9	{Evaporated water; Steam}	F23L7/00	F23L7/00		1211
F23L7/007	8	{Supplying oxygen or oxygen-enriched air}	F23L7/00	F23L7/00		1734
F23L9/00	7	Passages or apertures for delivering secondary air for completing combustion of fuel&#160; (baffles or deflectors in air inlets&#160;F23M9/02)	F23L9/00	F23L9/00		1753
F23L9/02	8	by discharging the air above the fire	F23L9/02	F23L9/02		652
F23L9/04	8	by discharging the air beyond the fire, i.e. nearer the smoke outlet	F23L9/04	F23L9/04		330
F23L9/06	8	by discharging the air into the fire bed	F23L9/06	F23L9/06		177
F23L11/00	7	Arrangements of valves or dampers after the fire	F23L11/00	F23L11/00		490
F23L11/005	8	{for closing the flue during interruption of burner function}	F23L11/00	F23L11/00		274
F23L11/02	8	for reducing draught by admission of air to flues	F23L11/02	F23L11/02		635
F23L13/00	7	Construction of valves or dampers for controlling air supply or draught	F23L13/00	F23L13/00		921
F23L13/02	8	pivoted about a single axis but having not other movement (formed as linked slats each pivoted about an axis F23L13/08)	F23L13/02	F23L13/02		984
F23L13/04	9	with axis perpendicular to face	F23L13/04	F23L13/04		82
F23L13/06	8	slidable only	F23L13/06	F23L13/06		336
F23L13/08	8	operating as a roller blind; operating as a venetian blind	F23L13/08	F23L13/08		49
F23L13/10	8	having a compound movement involving both sliding and pivoting	F23L13/10	F23L13/10		29
F23L15/00	7	Heating of air supplied for combustion	F23L15/00	F23L15/00		2320
F23L15/02	8	Arrangements of regenerators	F23L15/02	F23L15/02		1786
F23L15/04	8	Arrangements of recuperators	F23L15/04	F23L15/04		2059
F23L15/045	9	{using intermediate heat-transfer fluids}	F23L15/04	F23L15/04		239
F23L17/00	7	Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues	F23L17/00	F23L17/00		855
F23L17/005	8	{using fans}	F23L17/00	F23L17/00		746
F23L17/02	8	Tops for chimneys or ventilating shafts; Terminals for flues	F23L17/02	F23L17/02		2492
F23L17/04	9	Balanced-flue arrangements, i.e. devices which combine air inlet to combustion unit with smoke outlet	F23L17/04	F23L17/04		363
F23L17/06	9	branched; T-headed	F23L17/06	F23L17/06		61
F23L17/08	9	with coaxial cones or louvres	F23L17/08	F23L17/08		158
F23L17/10	9	wherein the top moves as a whole	F23L17/10	F23L17/10		792
F23L17/12	9	Devices for fastening the top or terminal to chimney, shaft, or flue	F23L17/12	F23L17/12		171
F23L17/14	9	Draining devices	F23L17/14	F23L17/14		140
F23L17/16	8	Induction apparatus, e.g. steam jet, acting on combustion products beyond the fire	F23L17/16	F23L17/16		869
F23L99/00	7	Subject matter not provided for in other groups of this subclass	F23L99/00	F23L99/00		28
F23L2700/00	7	Installations for increasing draught in chimneys; Specific draught control devices for locomotives	CPCONLY	F23L2700/00		1
F23L2700/001	8	Installations for increasing draught in chimneys	CPCONLY	F23L2700/001		386
F23L2700/002	8	Specific draught control devices for locomotives	CPCONLY	F23L2700/002		188
F23L2900/00	7	Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber	CPCONLY	F23L2900/00		11
F23L2900/00001	8	Treating oxidant before combustion, e.g. by adding a catalyst	CPCONLY	F23L2900/00001		114
F23L2900/05021	8	Gas turbine driven blowers for supplying combustion air or oxidant, i.e. turbochargers	CPCONLY	F23L2900/05021		27
F23L2900/07001	8	Injecting synthetic air, i.e. a combustion supporting mixture made of pure oxygen and an inert gas, e.g. nitrogen or recycled fumes	CPCONLY	F23L2900/07001		242
F23L2900/07002	8	Injecting inert gas, other than steam or evaporated water, into the combustion chambers	CPCONLY	F23L2900/07002		188
F23L2900/07003	8	Controlling the inert gas supply	CPCONLY	F23L2900/07003		60
F23L2900/07004	8	Injecting liquid or solid materials releasing oxygen, e.g. perchlorate, nitrate, peroxide, and chlorate compounds, or appropriate mixtures thereof	CPCONLY	F23L2900/07004		35
F23L2900/07005	8	Injecting pure oxygen or oxygen enriched air	CPCONLY	F23L2900/07005		385
F23L2900/07006	8	Control of the oxygen supply	CPCONLY	F23L2900/07006		140
F23L2900/07007	8	using specific ranges of oxygen percentage	CPCONLY	F23L2900/07007		142
F23L2900/07008	8	Injection of water into the combustion chamber	CPCONLY	F23L2900/07008		120
F23L2900/07009	8	Injection of steam into the combustion chamber	CPCONLY	F23L2900/07009		157
F23L2900/15021	8	using regenerative heat exchanger bodies with different layers of material	CPCONLY	F23L2900/15021		17
F23L2900/15022	8	using pre-purging regenerator beds	CPCONLY	F23L2900/15022		13
F23L2900/15041	8	Preheating combustion air by recuperating heat from ashes	CPCONLY	F23L2900/15041		22
F23L2900/15042	8	Preheating combustion air by auxiliary combustion, e.g. in a turbine	CPCONLY	F23L2900/15042		39
F23L2900/15043	8	Preheating combustion air by heat recovery means located in the chimney, e.g. for home heating devices	CPCONLY	F23L2900/15043		161
F23L2900/15044	8	Preheating combustion air by heat recovery means using solar or other clean energy	CPCONLY	F23L2900/15044		13
