Efficiency heater

Claim 1

In a heater: a combustion chamber of tent-shaped configuration, a pair of joined and slanted walls on said combustion chamber, said combustion chamber extending the entire vertical height of heater, an outer jacket defining the outer configuration of said heater, the entire surface of each of said slanted walls presenting a medium of heat exchange throughout their entire exterior surfaces, cut away portions located in the base areas of said outer jacket to provide ingress for clean air at the base edge on each of said slanted walls, said base edges terminating at the lower limit of said outer jacket and adjacent to said openings, thereby presenting to the clean air entering immediate heating and immediate upward convection, additional heating surfaces for transmitting heat to the clean air, said means comprising an inner jacket located inside said outer jacket in the upper area of said heater and forming with said outer jacket a residual burning chamber, means for sealing the interior of said combustion chamber and the interior of said residual burning chamber from the clean air being heated, said last named means comprising: edges on said slanted walls, these edges being designated for convenience, a first edge, a second edge, and third and fourth edges, said first edge being an integral line throughout its length, and being secured throughout its length to the inner surface of said outer jacket and in sealed relationship therewith, said second edge having an upper segment cut away to form a shoulder and a lower segment, said lower segment being secured to the inner surface of said outer jacket and in sealed relationship therewith, each of said third and fourth edges having upper portions cut away, forming upper and lower segments, said last named upper segments being secured to said inner jacket and in sealed relationship therewith, said last named lower segments being secured to the inner surface of said outer jacket and in sealed relationship therewith.