Stove with draft air cooling of rear, opposite side and flue pipe

Claim 1

A room heater including a pair of opposite side walls and front, rear and top walls interconnecting and extending between front, rear and top and bottom marginal portions of said side walls, a pair of inner side panels spaced inwardly of said side walls and extending between said top and bottom walls, a rear inner panel spaced inward of said rear wall and extending between said side walls and having the rear marginal portions of said inner side panels secured thereto inwardly of said side walls, said side panels including air passage openings formed therethrough in the forward lower portions thereof, said heater defining a firebox therein between said side panels and between said rear panel and said front wall and including a flue outlet opening outwardly from an upper rear portion of said firebox, and combustion air inlet means operative to admit combustion air into the lower portion of the area between said rear wall and said rear panel, the front and rear portions of the areas between said side walls and the corresponding side panels being closed by said front and rear walls, respectively, said top wall including lower forward and upper rear portions interconnected by an upstanding intermediate portion extending between the front and rear marginal portions of said upper rear and lower forward portions, a generally horizontal inner top wall portion spaced below said upper rear portion rearward of said intermediate portion extending between said side walls and having front and rear marginal portions secured to said intermediate portion and the upper marginal portion of said rear panel, the upper rear marginal edge of said inner side panels, and said inner top wall portion having openings formed therein opening downwardly into the upper rear portions of said areas between said side walls and corresponding side panels, the upper marginal portion of said area between said rear wall and said rear panel opening into the area defined between said top wall upper rear portion and said inner top wall portion, said flue outlet opening including an upstanding tubular outlet fitting secured downwardly through the upper rear portion of said top wall and also downwardly through said inner top wall with a rear portion of the interior of said tubular outlet fitting disposed to the rear of the upper marginal portion of said rear inner panel and opening downwardly directly into the upper portion of the area between said rear wall and rear inner panel, the rear portion of the interior of said outlet fitting opening downwardly into said area between said rear wall and said rear inner panel serving as a venturi to admit a portion of the air supplied to the area between said rear wall and said rear wall panel by said combustion air inlet means directly into said outlet fitting for admixing with and thus cooling of the gaseous byproducts of combustion discharged into said outlet fitting from said firebox.