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 6135-00-477-8847
NSN 4140-00-277-6285
NSN 6645-00-021-6408
NSN 6650-01-571-6303
NSN 5910-01-490-0335
NSN 5999-00-466-3226
NSN 5996-01-601-1299
NSN 6620-01-037-8468
NSN 6650-01-107-7553
NSN 6650-01-431-9625
NSN 5905-01-106-8518
NSN 5950-00-554-4870