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 5945-01-510-5730
NSN 6645-01-607-4078
NSN 5915-00-869-4868
NSN 6150-01-559-5430
NSN 5930-01-442-7809
NSN 6110-00-181-5634
NSN 6220-01-602-2398
NSN 6105-01-422-8139
NSN 4140-00-246-4969
NSN 6150-00-636-8938
NSN 6220-01-391-1851
NSN 6135-01-062-9356