Patent ID: 8573504

Claim:
A furnace comprising, a hopper having a first opening, a conveyor member arranged for conveying a fuel through the first opening, a first blower tube arranged for receiving the fuel from the hopper through the first opening, a first blower operatively coupled to the first blower tube and arranged for blowing the fuel through the first blower tube, a combustion chamber operatively coupled to the first blower tube opposite the first blower, a heat exchanger arranged above the combustion chamber, a second blower operatively coupled to a first compartment and arranged to blow a cooling air into the first compartment and through the heat exchanger, the first compartment at least partially surrounding the combustion chamber and the heat exchanger, a programmable control system operatively coupled to the conveyor member, the first blower, the second blower and a plurality of thermocouples, and a first pressure gauge for measuring the first compartment air pressure, the first pressure gauge being operatively coupled to the programmable control system and the programmable control system including auger off instructions configured for automatically inactivating the auger when the first compartment air pressure is less than desired.