Patent ID: 7997004

Claim:
A portable air heating system for heating an enclosed area without venting exhaust fumes into the enclosed area, so as to prevent the introduction of dangerous gases into the enclosed area, the portable air heating system comprising: at least one fuel burner configured to produce heat and exhaust fumes as fuel is burned; an air transfer assembly including an air intake conduit drawing air in from a location remote from the exhaust gases produced by said fuel burner and an air outlet conduit releasing the heated air at a desired location; a heat transfer housing supporting at least one heat transfer tube and said at least one fuel burner, said at least one fuel burner being disposed horizontally within said heat transfer housing, said heat transfer housing having an outside surface defining an exterior surface of the portable heating system, said heat transfer housing defining a path for the exhaust fumes around said at least one heat transfer tube as said at least one heat transfer tube provides a path through said heat transfer housing in which the air flowing therethrough and being heated is isolated from the exhaust fumes produced by said at least one fuel burner, said at least one heat transfer tube being fluidly connected to said air intake conduit and said air outlet conduit, each end of said at least one heat transfer tube extending at least through said outside surface of said heat transfer housing and to said air intake conduit and to said air outlet conduit; and at least one heat deflector connected to said heat transfer housing, said at least one heat deflector being angularly disposed within said heat transfer housing proximate to said at least one heat transfer tube to focus the heat from said at least one fuel burner around said at least one heat transfer tube and away from a portion of said heat transfer housing.