Truck electrified engine-off air conditioning system

An air conditioning system for cooling an environment in an over-the-road vehicle is provided. The air conditioning system includes an electrically driven, variable speed compressor, which enables operation of the system when the engine of the over-the-road 5 vehicle is not running. The system is modular and is adapted to be installed in the side luggage compartment of the vehicle to enable existing vehicles to be retrofitted to provide no-idle air conditioning. The housing of the system defines two flow paths therethrough; one cold air path and one hot air path. The hot air path is configured to intersect the condenser at least two times, and draws and expels the air through the same wall of the 10 housing. An air direction device is used to reduce the amount of air recirculation through the hot air path to increase the efficiency of the system. Cooled 28 Environment \ Air 16 aAmbient Outside Air Warm 32 Environment Air / ~ 8 " < Heated Outside Air