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 5998-01-367-4228
NSN 5950-01-599-8476
NSN 2925-00-203-8735
NSN 5996-00-242-4384
NSN 4140-00-660-8699
NSN 6240-01-055-5193
NSN 5920-01-102-3248
NSN 5975-01-235-1962
NSN 6110-00-788-8865
NSN 5920-00-276-8657
NSN 6105-00-733-9226
NSN 6145-01-614-3234