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 5935-01-235-1257
NSN 6150-00-493-6720
NSN 7035-01-153-1767
NSN 5915-01-355-5533
NSN 6610-01-385-1771
NSN 4140-00-812-5016
NSN 6685-01-240-4648
NSN 5935-01-450-9412
NSN 6320-01-422-1212
NSN 5925-01-013-9650
NSN 6240-01-372-2039
NSN 4140-01-646-3016