MIL-PRF-14516G
3.3.14.4 Sharp edges. Non-functional sharp edges and projections shall be eliminated.
3.3.14.5 Noise. Noise levels, as measured from 3 feet from the heater, shall not exceed 60
dB.
3.3.14.6 Bottom surface temperature. The bottom surface of the heater in contact with the
floor shall remain at 175E F or less during all modes of operation.
3.4 Support or ownership requirements. Each heater shall meet the following logistics
requirements.
3.4.1 Mean Time Between Essential Function Failure (MTBEFF)/Maintenance Ratio(MR).
The heaters shall meet a quantitative reliability requirement MTBEFF of 615 hours . The heater
maintainability requirement is a total unit, direct support (DS), and, general support (GS) MR
which shall not to exceed 0.0016 maintenance man-hour per operating hour, not including
preventive maintenance checks and services (PMCS).
3.4.2 Preventive maintenance checks and services (PMCS). . PMCS shall not exceed 10
minutes time to accomplish. The heater fuel lines and burner shall be designed in such a manner
to allow for operator inspection. The minimum PMCS items to be checked shall be secure
connections of lines, fuel leaks, exhaust obstructions, burner, and general condition to permit
operation. There shall be no new system specific test, measurement, and diagnostic equipment,
or special tools to repair or maintain the heater.
3.4.3 Transportability. The heaters shall be transportable in the High Mobility Multipurpose
Wheeled Vehicle (HMMWV), heavy-HMMWV, the Commercial Utility Cargo Vehicle
(CUCV), and standard Army cargo trucks (2 2 to 5 ton) and all standard Army cargo trailers
having a 3 to 1 2 ton capacity.
3.4.3.1 Loose cargo. The heaters shall be of sufficient durability to be transported as loose
cargo in any of the required transport vehicles.
3.4.3.2 Drop . The heaters shall be of sufficient durability to survive an accidental drop from
any of the required transport vehicles.
3.4.4 Drag capability. The heater shall be capable of being dragged across a flat surface by
one soldier.
3.4.5 Labels/tags. The heaters shall have an instruction plate permanently attached in an
immediately obvious location which provides warnings, start up and shut down procedures,
operating procedures, and safety cautions. The fuel control and heater lettering shall be
permanent for the life of the item. Controls shall not obscure labels. Labels shall be located in a
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