Solid fuel clean burning zero clearance fireplace

A clean burning pyrolytic temperature fireplace for burning solid fuels, comprising:

• a solid fuel fireplace having a transparent glass sidewall for viewing solid fuel being burned,
• said fireplace having a central combustion chamber comprising high temperature bottom, side and back refractory walls for retaining combustion temperatures in excess of 1100.degree. Fahrenheit,
• a primary combustion air heat exchanger mounted in the top of said combustion chamber in the exhaust gas path from said combustion chamber,
• said primary combustion air heat exchanger comprising a primary air inlet for connection to a source of primary air and an outlet grill connected thereto for discharging preheated primary combustion air downward across the inside surface of said transparent glass sidewall and into the bottom of said combustion chamber,
• a secondary combustion air heat exchanger comprising a transverse outlet manifold mounted in the top of said combustion chamber in said exhaust gas path,
• said secondary combustion air heat exchanger further comprising a secondary air inlet at the front of said fireplace for connection to a source of secondary air and connected through a horizontal and a vertical duct behind said refractory walls to said transverse outlet manifold for discharging preheated secondary air across the top of said combustion chamber, whereby incompletely burned solid fuel products of combustion are further oxidized at pyrolytic temperatures of said refractory walls while maintaining the inside surface of said transparent glass sidewall at a temperature below 750.degree. Fahrenheit while achieving high efficiency burn rates at different rates of combustion.

A clean burning pyrolytic temperature fireplace for burning solid fuels, comprising:

• a solid fuel fireplace having a transparent glass sidewall for viewing solid fuel being burned,
• said fireplace having a central combustion chamber comprising high temperature bottom, side and back refractory walls for retaining combustion temperature in excess of 1100.degree. Fahrenheit,
• a primary combustion air heat exchanger mounted in the top of said combustion chamber in the exhaust gas path from said combustion chamber,
• said primary combustion air heat exchanger comprising a primary air inlet for connection to a source of primary air and an outlet grill connected thereto for discharging preheated primary combustion air downward across the inside surface of said transparent glass sidewall and into the bottom of said combustion chamber,
• a secondary combustion air heat exchanger also mounted in the top of said combustion chamber in said exhaust gas path,
• a top panel having a refractory panel element located above said secondary combustion air heat exchanger and below said primary air heat exchanger and forming a narrow escape outlet area therebetween for exhaust gases which are directed into an exhaust stack of said fireplace,
• support means for supporting said top panel and for adjusting the height of said top panel and the outlet area for said exhaust gases to said exhaust stack,
• said secondary combustion air heat exchanger comprising a secondary air inlet for connection to a source of secondary air and an outlet manifold for discharging preheated secondary air across the top of said combustion chamber, whereby incompletely burned solid fuel products of combustion are further oxidized at pyrolytic temperatures at said refractory walls while maintaining the inside surface of said transparent glass sidewall at a temperature below 750.degree. Fahrenheit while achieving high efficiency burn rates at different rates of combustion.