Tube has 36 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 6610-01-603-0703
NSN 4140-00-615-8623
NSN 5835-01-541-9991
NSN 2925-01-250-2731
NSN 5985-00-541-7714
NSN
NSN 6650-01-423-3767
NSN 4140-00-277-4184
NSN 5945-01-441-6458
NSN 5925-01-050-9661
NSN 6130-01-269-5938
NSN 5905-01-500-2089