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An APU, Auxiliary Power Unit, is used on a truck primarily for driver comfort. In order to meet EPA diesel emission requirements truck operators can no longer idle their truck engine while they are stopped for extended periods of time. An APU can provide heat, air conditioning and electricity for hotel loads such as microwaves, televisions and block heaters. An APU will consume less fuel ( about 1/10th) than that of the truck engine. An APU is a very broad term for a unit that may only provide heat, heat and air or heat, air and electricity. APU's that provide electricity must include a generator.

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15y ago

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