S-U-2833, FEDERAL SPECIFICATION: UNIT HEATER, AIR-CIRCULATING, STEAM - HOT WATER (29-APR-1994) [SUPERSEDING MIL-U-17691D] [NO S/S DOCUMENT]

S-U-2833, FEDERAL SPECIFICATION: UNIT HEATER, AIR-CIRCULATING, STEAM - HOT WATER (29-APR-1994) [SUPERSEDING MIL-U-17691D] [NO S/S DOCUMENT]., This specification covers unit air heaters using steam or hot water as the heating medium.