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 5855-01-656-3069
NSN 5910-01-247-2133
NSN 5975-01-360-1485
NSN 6650-01-132-2697
NSN 5999-00-914-8311
NSN 5975-00-683-2743
NSN 5835-00-764-4388
NSN 5895-01-317-6442
NSN 5925-01-519-2295
NSN 5985-00-734-7479
NSN 5930-00-792-2203
NSN 5920-01-311-5289