Magnetic permeability shall be less than 1.2 before fabrication and not greater than 2.0 after fabrication as measured in a oersted field, tube has 60 fins per ft.
A heat transferring unit utilizing a separate source of steam or hot water as the heat transfer medium. It consists of finned parallel tubes joined together by a header or headers and is designed for installation in the ducts of a forced air circulating system. It may be provided with a flanged outer casing to facilitate mounting of the unit in planned or existing duct work. Circulation of the heated air is achieved by use of a blower or fan not integral with the heating unit.
Classification: Air heaters and hot air distributors, not electrically heated, incorporating a motor-driven fan or blower, and parts thereof, of iron or steel
NSN 6110-00-077-4724
NSN 5855-00-832-9341
NSN 5835-00-759-1109
NSN 5920-01-123-9854
NSN 6150-00-824-8626
NSN 5835-00-257-2852
NSN 5975-01-522-4989
NSN 5998-00-734-5346
NSN 5996-00-130-0841
NSN 6610-01-296-4462
NSN 6135-01-238-2878
NSN 5998-01-094-6494