A-A-50543, COMMERCIAL ITEM DESCRIPTION HEATERS, CONVECTION, STEAM OR HOT WATER (SEP 30, 1993)

A-A-50543, COMMERCIAL ITEM DESCRIPTION HEATERS, CONVECTION, STEAM OR HOT WATER (SEP 30, 1993), This CID covers coil or cast finned-tube heaters (convectors) of the natural-air-circulation type, operated with steam of hot water to supply heated air in individual rooms of residences, offices, etc.