Tube has 60 fins per ft
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 5905-01-439-3210
NSN 5990-00-578-8850
NSN 2925-00-172-9264
NSN 7035-01-549-6765
NSN 5945-01-183-8838
NSN 6620-00-033-3280
NSN 5985-01-576-0997
NSN 6620-01-502-1656
NSN 5910-00-595-9851
NSN 5998-01-631-5403
NSN 5935-00-139-4957
NSN 5915-01-194-7598