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 4140-01-516-2446
NSN 5990-01-252-8175
NSN 6135-01-061-1862
NSN 6320-00-908-6841
NSN 5935-01-089-5459
NSN 5985-01-158-5645
NSN 5965-01-350-1890
NSN 5975-00-724-3147
NSN 5975-01-418-7028
NSN 5905-01-137-8754
NSN 4140-00-477-1863
NSN 6610-01-400-3880