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 5925-01-085-4355
NSN 6220-00-659-9455
NSN 5985-01-381-2249
NSN 5998-00-951-6466
NSN 5999-01-551-6143
NSN 5960-01-560-8461
NSN 6645-01-258-0370
NSN 6645-00-836-2984
NSN 6240-00-222-9135
NSN 6650-00-938-9233
NSN 6110-00-074-1442
NSN 5930-00-764-1114