Floor furnace heating system

Claim 1

A floor furnace comprising: a. a housing open at top and bottom, b. means operable to suspend said housing beneath the floor of a room space to be heated, in sealed communication with an aperture formed in said floor, c. a power driven fan disposed operatively in the bottom opening of said housing and operable to delivery air upwardly through said housing, d. a combustion chamber supported within said housing to form an annular air passage therebetween through which air delivered by said fan must travel, e. means for burning fuel within said combustion chamber, f. air directing means disposed within said air passage and operable to impart a horizontal whirling motion to air moving upwardly through said air passage as it is heated by said combustion chamber, whereby air emerging upwardly from said air passage and floor aperture into said room space is caused by centrifugal force to flow generally horizontally outwardly from said aperture over a major portion of the area of said room space, at or adjacent the floor thereof, g. an outer housing of greater horizontal cross-sectional area than said first-named housing suspended from said floor aperture, and in which said first-named housing and said combustion chamber are in turn suspended, said outer housing extending below said first-named housing and being closed at its lower end, h. means sealing the upper end of the air space between said outer and first-named housings, and i. means for admitting air to said last-named air space.