Patent ID: 7946257

Claim:
A fuel-fired heating appliance having a combustion chamber assembly comprising: a hollow body having an interior circumscribed by a side wall; a plate member extending generally transversely to said side wall and dividing said interior into a combustion chamber and an air intake plenum; a combustion air intake opening extending through said side wall into said air intake plenum; a fuel burner centrally disposed in said combustion chamber in a spaced relationship with said plate member and in a facing relationship with a central portion thereof; an air transfer opening extending through said central portion of said plate member; and a wall structure disposed in said air intake plenum and extending inwardly from said combustion air intake opening, said wall structure forming a passage for receiving air drawn inwardly through said combustion air intake opening and flowing a portion of the received air to said air transfer opening for transfer therethrough into said combustion chamber, said passage having a volume substantially less than that of said air intake plenum, said wall structure including two elongated, oppositely sloped support leg structures underlying said plate member, and said passage extending between said leg structures, having a progressively narrowing configuration, and being operative to horizontally funnel said portion of the received air to said air transfer opening.