Magnetic permeability 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 90 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 6620-00-417-6285
NSN 4140-01-199-9118
NSN 5999-00-466-3226
NSN 5990-01-555-6616
NSN 5905-00-599-8366
NSN 5998-01-076-4364
NSN 5920-01-170-3464
NSN 6610-01-542-2276
NSN 6110-00-988-0920
NSN 5855-01-117-7207
NSN 5975-00-044-2101
NSN 2925-01-423-8141