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 6220-01-502-4088
NSN 5930-01-656-6818
NSN 5985-01-509-0510
NSN 6240-01-407-5690
NSN 5910-00-233-6104
NSN 6620-01-476-7355
NSN 5895-00-079-9693
NSN 6240-00-527-8614
NSN 5945-00-900-6282
NSN 6685-01-343-5523
NSN 5985-01-030-3415
NSN 4140-00-707-5963