Convector having a flattened plastic tube spiral

Claim 1

A wall mountable tube convector for heating air wherein air is heated by contact with hot tubes and rises by convection, said convector comprising a hot liquid conducting plastic tube of high thermal stability formed into a plurality of tube windings extending in the form of a vertically oriented flattened helix having a central, axially extending vertical plane parallel to the flattened sides of the helix, all the helix windings being arranged in parallel planes intersecting said central vertical plane along substantially horizontal lines and extending obliquely to the horizontal, tube spreaders between the windings arranged to maintain said windings in a predetermined shape and at predetermined mutual intervals, the first mounting means cooperating with the tube windings for mounting said tube on a wall spaced a distance from said wall, a screen enclosing said tube coils, and second mounting means for mounting said screen on said tube coils spaced a distance from said coils, said screen, in cooperation with the wall, forming an open-ended chimney around said tube coils, whereby said first and second mounting means produce a double flue effect to permit every part of the spiral to be exposed to a substantially unobstructed, uniform airflow in and about said coils to increase heat transfer.