Patent ID: 6367703
Filing Date: 2002-04-09
Classification: F24D,F28D,F28F,Y02B

Abstract:
A heating system for a building which includes a gas venting system and a heat exchange system for said building, said heating system comprising:(a) a furnace having an interior space and means to present a flame into said interior space; (b) a water jacket surrounding said interior space and having a primary water inlet at the lower end of the water jacket, and a primary water outlet at the upper end of the water jacket; (c) A gas exhaust flue operatively connected to said interior space and for being connected to said gas venting system; (d) a primary feed conduit connecting said heat exchange system to said primary water outlet; (e) a primary return conduit connecting said heat exchange system to said primary water inlet; (f) a gas-to-water heat exchange apparatus operatively connected to said gas exhaust flue and having a secondary water inlet and a secondary water outlet; (g) a supplemental feed conduit connected to said primary water feed conduit and to said secondary water outlet; (h) a supplemental return conduit connected to said primary return conduit and to said secondary water inlet; (i) a primary pump which can be controlled by a thermostat to be on or off and operatively connected to said primary return conduit for pumping water from said heat exchange system to said water jacket and back to said heat exchange system when said primary pump is on; and j) a secondary pump which can be controlled by a thermostat to be on or off and operatively connected to one of said supplemental feed conduit and said supplemental return conduit for pumping water from said primary water inlet through said gas-to-water heat exchange apparatus and into said water jacket through said primary water inlet when said primary pump is off and for pumping water from said primary return conduit through said gas-to- water heat exchange apparatus to said primary feed conduit when said primary pump is on and said secondary pump is on.