Patent ID: 7509954

Claim:
An improvement in the art related to a slide-in residential wood-burning fireplace insert system designed to fit into a standard fireplace cavity for the purpose of supplying and delivering heated columns of air into an attending room, the said wood-burning fireplace insert system is also able to use coal, wood pellets, charcoal, brickettes, etc. for the purpose of providing red hot coals for a central heat-generating source of radiated heat available to warm a system of pipes or tubings, the said pipes or tubings comprising a five-sided, slide-in box structure (plus front closure, grate and ash pan) encircling the said heat-generating source, the said box structure loosely formed of metal pipes (or tubings) fixedly attached to one or more plenum chambers, the said plenum chambers in turn fixedly attached to a control/base, each said plenum chamber equipped with a suction fan which supplies and divides the incoming air into a plurality of tubing-confined advancing columns of air, to be heated by radiation from the said heat-generating source, the walls of the said pipes or tubings temporarily store radiated heat from the said heat-generating source, the walls of the said metal tubes dispense it in turn by physical contact with the said column of advancing air passing in contact within, under plenum air pressure through the exiting outlet holes provided in the said plenums to which the said metal tubing entrances are fixedly attached, the said tubing-confined advancing columns of air rise up the right and left sides within the said fireplace cavity from the said plenum chambers, each side of said tubing-confined advancing columns of air bend 90 degrees approaching each other near the said cavity top generally centered above the said heat-radiating source, the said tubings immediately bend another 90 degrees to converge in generally parallel column-paths toward the rear of the said fireplace cavity to converge again 90 degrees down the back of the said fireplace cavity, finally to converge 90 degrees once again in parallel fashion to terminate their collective said confined heated advancing air column tubings fixedly attached to the exit holes provided in the face of the said control/base the said heated air passing over the inserted said Calrod heating rod configuration to exit from the said air-confining metal tubings at which point the said heated advancing tubing-confined columns of air are exited into the said attendant room, the said fireplace insert system incorporating all related draft, fan and heat regulating controls, the said hinged damper in a control/base sufficiently large enough to allow removal and re-insertion of an ash pan as well as to provide additional air draft capacity when using hobs â€œassistâ€ on start-up, a woven wire (or cast iron) grate not fixedly attached to the said control/base because of operational adjustment flexility, cleaning and replacement constraints due to wear and testing parameters.