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 5990-00-404-9567
NSN 6685-00-171-9815
NSN 6220-01-051-0363
NSN 5975-00-736-3420
NSN 6685-01-276-3027
NSN 5965-01-337-0250
NSN 6650-01-484-7095
NSN 6145-01-410-7153
NSN 5895-00-648-9549
NSN 6145-01-288-2154
NSN 5965-01-648-3736
NSN 5975-00-503-4697