Fireplace construction

Claim 1

In a fireplace construction adapted to be housed in a structure, the combination of: a sheet metal firebox having an open side, two opposite side walls adjacent said open side and a combustion gas outlet adapted to be in fluid communication with a flue, each side wall having an opening formed therein; a door for substantially sealing said open side; a sheet metal housing at least partially surrounding said firebox in close proximity hereto; a relatively low inlet in said housing through which air in a structure housing said fireplace may enter said housing; a relatively high outlet in said housing through which air in said housing may exit the housing to re-enter the structure housing the fireplace; said housing, inlet and outlet defining a first air flow path for circulating air; a pair of conduits each in fluid communication through an opening with the interior of said firebox for establishing second and third air flow paths extending through and isolated from said first air flow path, said conduits extending from a point adapted to be located exteriorly of the structure housing the fireplace to its respective opening in each side wall of said firebox to provide a source of combustion air from a location exterior of the structure housing the fireplace; a pair of spaced apart vertical sheet metal baffles located within said firebox one spaced from each side wall, each opening being in communication respectively with the space defined between each baffle and side wall, each baffle including a cutout adjacent said open side near the lower extremity thereof and an upper end spaced from the top of said firebox to permit combustion air to pass thereover; and a baffle structure disposed across the lower forward end of said firebox between said baffles, said baffle structure having oppositely disposed open ends and defining passageways for directing air upwardly across the door and downwardly across the bottom of said firebox, the cutouts of said baffles being generally aligned with said open ends of said baffle structure so that combustion air is delivered into said open ends.