Tube has 36 fins per ft., conforms to mil-h-16235c
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 5920-01-653-9512
NSN 5960-01-609-6565
NSN 5930-01-535-6976
NSN 5975-01-493-8345
NSN 5990-01-136-4068
NSN 6150-00-596-9253
NSN 6135-01-467-5100
NSN 5915-01-097-5480
NSN 6110-01-243-0446
NSN 5999-01-042-1076
NSN 5855-00-010-2980
NSN 6320-00-036-3688