Abstract: A portable conditioned air breathing pipe is provided in which a heat conductive tube having a burner or other suitable heating means therein is mounted in the pipe bowl in sealed relationship with a surrounding chamber which is connected through a tubular casing to a mouthpiece and fresh air is introduced into the surrounding chamber and heated so that heated air can be withdrawn through the mouthpiece to the mouth of the user. According to preferred embodiments, the outer surface of the heat conductive tube is provided with heat exchange fins, the interior of the heat exchange tube is provided with a heat economizer, the tubular casing is provided with a damper to admit cooler air and a filter is provided in the tubular casing between the heating chamber and the mouthpiece.

Abstract: A portable conditioned heated air breathing device is provided comprising a compartmented canister with a collapsible hose storage compartment, an air conditioning compartment and a heating compartment and which also contains an ejector for ejecting an additive into the conditioned air as well as a structural arrangement for mixing fresh air with heated air, a filter for filtering the air and a device for igniting a burner from the outside of the canister and a manually controllable valve for controlling the flow of fuel to the burner.