US 4,301,783 AGranted

Three wall forced air heating unit

AssigneeCEBU Corporation

InventorsCarrol E. Buckner, C. Glenn Cook, Thomas J. Kane

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Abstract

A forced air heating unit having a first U-shaped air channel with inlet vents adjacent the front, and a second U-shaped forced air channel interior said first forced air channel communicating with the first forced air channel via an opening in the common rear wall and having exit vents adjacent the front. A fan is mounted to the rear wall having the motor exterior the forced air channels with an impeller in the common rear wall opening. A conical deflector extends from the interior wall of the second forced air channel towards said rear wall opening. A refractory floor in the firebox includes front, side and rear vertical portions with top surfaces inclined towards the respective wall. The rear and side vertical portions exceed the height of a grate or andirons positioned on the refractory floor.

Claims18

Dependent claims

A forced air solid fuel heating unit comprising:

a bottom wall;
a top wall;
first means mounted between said bottom and top walls forming a back and two side walls;
a second means between said bottom and top walls interior said first means forming a back and two side walls and defining a first channel between said first and second means;
third means between said bottom and top wall interior said second means forming a back and two side walls and defining a second channel between said second and third means;
fourth means between said bottom and top walls forming a front wall across the side walls of said first, second and third means;
a firebox interior of said back and two side walls of said third means and an access opening in said fourth means to said firebox;
said back and two side walls of said first means also constituting said back and side walls of said solid fuel heating unit, said back and two side walls being spaced from said firebox by said first and second channels;
air inlet means in said fourth means between said first and second means;
air outlet means in said fourth means between said second and third means;
fifth means in said rear wall of said second means for pneumatically interconnecting said first and second channels;
and
forced air means for forcing air in through said air inlet means into said first channel, through said fifth means into said second channel and out through said air outlet means.

10 more elements

A forced air solid fuel heating unit having a firebox, an inner hot air channel having a rear portion and side portions exterior of and substantially encompassing the rear wall and side walls of the firebox, heat vent means in each of said inner hot air channel side portions, an opening in said rear portion of said inner hot air channel, an outer insulating air channel having a rear portion and side portions exterior of and substantially encompassing said rear portion and side portions of said inner hot air channel such that said rear portion and said side portions of said outer insulating air channel are spaced from said firebox by said rear portion and said side portions of said inner hot air channel respectively whereby each side wall of said forced air heating unit is spaced from said firebox by said inner hot air channel and said outer insulating air channel, air intake means in each of said outer insulating air channel side portions, said opening in said rear portion of said inner hot air channel fluidically connecting said inner hot air channel to said outer insulating air channel, and means for drawing air into said air intake means and forcing said air from said outer insulating air channel to said inner hot air channel along the rear portion of said inner hot air channel into said side portions and out said heat vent means.

Dependencies are inferred from the claim text.