Magnetic permeability shall be less than 1.2 before fabrication and not greater than 2.0 after fabrication as measured in a 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 5930-01-397-2172
NSN 6240-01-327-3239
NSN 5960-00-230-5331
NSN 6685-00-225-8571
NSN 6320-00-433-2773
NSN 7035-01-290-1447
NSN 5996-00-369-5299
NSN 5950-00-257-1652
NSN 5996-00-217-2654
NSN 6150-00-286-0827
NSN 6220-00-936-3186
NSN 5920-00-420-8897