NPFC - MIL-PRF-62550
Heater Assembly, Combustion Vehicular Compartment, 8.8/17.6 Kw (30 000/60 000 Btu/Hr) General Specification
| Organization: | NPFC |
| Publication Date: | 13 July 2017 |
| Status: | active |
| Page Count: | 34 |
scope:
This specification covers a forced draft and ventilation air personnel heater assembly, referred to as a "heater".
Classification. Heaters should be of the following types and classes, as specified:
Type I - Heaters that must take their combustion and ventilating air from the same source ("Single Air").
Class I - Heaters that have a nominal rating of 8.8 kilowatts (kW) (30 000 British Thermal Units per Hour [Btu/hr]), but are also capable of operating at a nominal heating rate of 4.4 kW (15 000 Btu/hr).
Class II - Heaters that have a nominal maximum rating of 17.6 kW (60 000 Btu/hr), but are also capable of operating at a nominal heating rate of 8.8 kW (30 000 Btu/hr).
Type II - Heaters that can take their combustion and ventilating air from separate sources ("Dual Air"). C
lass II - Heaters that have a nominal maximum rating of 17.6 kW (60 000 Btu/hr), but are also capable of operating at a nominal heating rate of 8.8 kW (30 000 Btu/hr). (Type II MIL-PRF-62550/2 can be converted to Type I MIL-PRF- 62550/1)
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