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 4140-00-920-6393
NSN 6610-01-448-8904
NSN 6135-01-074-8220
NSN 4140-01-550-3438
NSN 6685-00-782-6031
NSN 5915-01-420-5466
NSN 5998-01-084-6055
NSN 6240-01-463-3132
NSN 6145-01-574-9779
NSN 5915-00-170-3178
NSN 5920-01-195-2299
NSN 5930-01-534-3028