Magnetic permability shall be less than 1.2 before fabrication and not greater than 2.0 after fabrication as measured in a 200 oersted field, 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 5855-01-285-3483
NSN 6240-01-571-7706
NSN 5925-00-205-2767
NSN 5996-01-065-3440
NSN 5905-01-119-6572
NSN 5905-01-188-8244
NSN 5975-00-891-9738
NSN 5950-01-530-3983
NSN 5975-01-539-3312
NSN 6620-01-201-6080
NSN 5985-00-291-1140
NSN 5960-00-539-7914