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 5990-01-564-6173
NSN 6610-01-640-9367
NSN 6685-01-241-2325
NSN 5835-01-380-1626
NSN 5990-01-259-7138
NSN 5835-01-525-3220
NSN 6130-00-144-8018
NSN 6620-00-351-9949
NSN 5930-01-231-3700
NSN 5935-01-281-7348
NSN 6105-01-315-1128
NSN 6685-01-521-3127