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 5990-00-226-1152
NSN 6105-01-356-2988
NSN 6645-01-124-6277
NSN 6110-00-852-0683
NSN 5975-00-394-9561
NSN 6240-01-116-3382
NSN 7035-00-076-4097
NSN 6610-01-218-2937
NSN 6130-00-776-9817
NSN 4140-00-203-0812
NSN 6135-01-048-0910
NSN 6320-00-857-4073