Tube has 90 fins per ft., conforms to mil-h-16235c
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 5835-01-193-6192
NSN 6130-00-616-4841
NSN 6145-01-482-0078
NSN 5999-01-574-9980
NSN 6685-01-525-6204
NSN 6145-00-936-0083
NSN 6135-01-054-2098
NSN 5990-01-421-3325
NSN 5975-00-632-7682
NSN 6150-01-250-0619
NSN 6685-00-081-3529
NSN 2925-01-391-1540