The Mach 8 has the lowest profile in the industry measuring in at 8 inches tall. Of course with the lower profile that means less drag and improved fuel efficiency. With two motors the Mach 8 delivers the same high BTUs of cool on both high and low speed operation. This unit has an industry exclusive molded one piece fiberglass base pan which provides excellent durability while reducing the weight.Weighing in at 90 lbs, the MACH 8 is the LIGHTEST low profile unit madeBackward compatible with any Coleman Mach air conditioner, and installs easily from the roof for ducted top down mounted systemsOperates even at desert conditions of 125 FHas the LARGEST BTU resistance heater of any RV air conditionerAnother Quality Coleman Mach air conditioner - 5,000,000 units and countingNOTE: You MUST purchase both an Upper Unit and a Ceiling Assembly for a complete system! These are sold as separate part numbers.