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 4140-01-227-6918
NSN 6110-00-009-9334
NSN 5950-01-417-2136
NSN 6130-00-174-1656
NSN 5965-01-210-7784
NSN 6110-00-288-4179
NSN 5835-00-451-2982
NSN 6220-01-204-3575
NSN 5915-01-004-9319
NSN 6320-01-448-6265
NSN 5996-00-186-8709
NSN 5998-00-389-8400