Air preheating means at a vertical steam or hot water boiler
Annular tube heat exchanger
Apparatus for feeding solid fuel to a furnace grate
Boiler
Boiler
Boiler construction
Boiler for liquid or gaseous fuels
Boiler for the combustion of liquid or gaseous fuels
Boiler having a separable furnace and heat exchanger
Boiler with cyclonic combustion
Boilers
Combined liquid filtering and heating apparatus
Combustion of halogenated hydrocarbons
Combustion of halogenated hydrocarbons with heat recovery
Compartmented gas flue for NOx control and particulate removal
Crescent heat exchanger liquid heater
Cyclone combustion apparatus
Cyclone combustion apparatus
Cyclonic combustion
Diesel fueled engine coolant heater