Fuel burning heater

Claim 1

A fuel burning heater comprising: (a) a lower housing defining a combustion chamber with a door at the front thereof, (b) an upper housing defining a heating chamber above said combustion chamber with a discharge port for products of combustion at the rear of said heating chamber, (c) a common wall between said lower housing and said upper housing defining a top wall for said combustion chamber and a bottom wall for said heating chamber, (d) a first discharge passageway through said common wall adjacent the forward end thereof for conveying products of combustion from said combustion chamber into the forward portion of said heating chamber, so that at least a portion of said products of combustion are adapted to pass through said forward portion of said heating chamber prior to being discharged through said discharge port, (e) a second discharge passageway through said common wall adjacent the rear end thereof for conveying products of combustion from the rear portion of said combustion chamber into the rear portion of said heating chamber, (f) a damper member mounted for movement relative to said second discharge passageway selectively toward an open position for faster burning of fuel and toward a closed position for slower burning of fuel, (g) lower draft regulator means adjacent the lower portion of said door for introducing controlled amounts of combustion air into the lower portion of said combustion chamber, and (h) upper draft regulator means adjacent the upper portion of said door for introducing controlled amounts of combustion air into the upper portion of said combustion chamber.