Fireplace cap with preheated secondary air supply

Stoves and furnaces – Grates – Agitating

Patent

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Details

126140, 126202, 126120, F24C 1504

Patent

active

045427364

ABSTRACT:
A fireplace cap is positioned outside the firebox of the fireplace. The cap has a framework comprised of first and second side members, an upper cross member and a lower damper section. A pair of hinged doors are mounted to this framework. Dampers selectively control the passage of primary combustion air directly to the firebox. A mantel overlies the upper cross member and a secondary air deflector baffle extends downwardly from the underside of the mantel. This baffle, together with the upper cross member, defines a transversely extending secondary air preheating chamber. Preheated air from the chamber is directed by the baffle across the doors prior to passing into the firebox. In one embodiment, secondary air enters the chamber through a space between the mantel and upper cross member. A valve controls the flow of secondary air to this space. In another embodiment, the damper section and side members define passageways which direct outside combustion air upwardly along the sides of the cap and into the chamber. Valves in the side passageways control the flow of air to the chamber.

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