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 36 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 6130-00-492-4543
NSN 5945-00-078-2265
NSN 5996-01-419-3573
NSN 6110-00-042-4712
NSN 5925-00-660-7589
NSN 4140-00-078-9357
NSN 6130-01-247-0626
NSN 6130-01-054-3751
NSN 5960-00-881-2050
NSN 5985-01-023-3124
NSN 6130-01-065-7253
NSN 5895-00-141-9127