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 5915-01-555-2960
NSN 6240-01-333-5455
NSN 6150-01-347-6876
NSN 5935-00-451-5907
NSN 2925-00-242-7688
NSN 6645-00-816-5337
NSN 6240-01-401-5340
NSN 5905-00-292-1113
NSN 6110-01-544-1805
NSN 5965-00-884-2344
NSN 5999-00-627-4316
NSN 5915-00-636-0629