Abstract: A furnace for burning solid burning biomass fuels such a municipal waste and wood pellets including a first compartment containing a hopper, a motorized auger positioned in the bottom of the auger for conveying a solid fuel out of the hopper, a first blower tube operatively coupled to the hopper for receiving the solid fuel from the hopper and a first blower operatively coupled to the blower tube for blowing the fuel through first blower tube. In a second compartment, the furnace contains a combustion chamber operatively coupled to the blower tube opposite the first blower and a heat exchanger arranged above the combustion chamber. To cool the heat exchanger, a second blower is operatively coupled to the heat exchanger for blowing a cooling air through the heat exchanger. A programmable control system is operatively coupled to the auger, the first blower, the second blower and a plurality of thermocouples for controlling the operation of the furnace.