Check the listing for details. ComfortPro Diesel Auxiliary Power Unit + COMPRESSOR. Condition: Used. Listed at 1500.00 USD. ComfortPro Diesel Auxiliary Power Unit + COMPRESSOR. USED AND WORKING ComfortPro diesel auxiliary power units (APUs) from Carrier Transicold are the trucking industry’s all-around performance leaders. No other APU offers the combination of air conditioning, heating, cab power, engine warming, truck battery charging, optional shore power connectivity and a 2,000-hour maintenance service interval found in the ComfortPro diesel units. Less an Accessory And More A NecessityEasy Maintenance: Enhanced drive system and 2,000-hour maintenance interval.Regulatory Compliance: Minimizes the risk of costly fines associated with anti-idling regulations and simplifies compliance.Driver Retention: Creates a more pleasant work experience for drivers while keeping costs down.Fuel Savings: Save nearly a gallon of fuel per hour, compared to idling the truck engine.Reduced Tractor Idling: Extends service intervals while also reducing wear and tear on the engine.