The Coleman-Mach 3 PLUS is one of the best RV air conditioning values available. It features a large evaporator and condenser coils with raised lance fins to help dissipate heat, has a solid 13,500 nominal BTU cooling capacity, and delivers 320 CFM (cubic feet per minute) airflow. You can count on the Mach 3 PLUS for reliability. All-copper tubing and gas-flux brazed joints ensure durability and long life for your RV air conditioner. Add the optional Heater Assembly, and you'll have 5,600 BTUs of heat for cool-weather outings.