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 6220-01-355-1251
NSN 4140-00-003-8311
NSN 5998-00-987-4476
NSN 6650-01-315-1160
NSN 5965-01-582-1702
NSN 5835-00-399-5358
NSN 5905-01-186-8421
NSN 5935-01-423-9084
NSN 5905-01-398-9078
NSN 2925-01-461-6372
NSN 6150-01-220-8914
NSN 2925-01-078-7854