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Cool down your RV after hot afternoons with this complete 18,000 Btu AC system. Variable-speed cooling, a 360-degree airflow ceiling assembly, and a wall thermostat help reduce hot spots, while the polished white shroud adds a sleek roofline.
Replacing an RV air conditioner gets more complicated when the rooftop unit, ceiling assembly, and controls have to be matched one piece at a time. This complete Coleman-Mach system includes the 18,000 Btu rooftop air conditioner, air distribution box, and wall thermostat, giving you the main components needed for a matched R32 setup. This eliminates compatibility issues during the swap because the rooftop unit, air distribution box, and wall thermostat are made to worked together.
When your RV has been sitting in full sun all afternoon, the roof, walls, and cabinets can hold heat long after the temperature outside starts to drop. This system gives you 18,000 Btu of cooling capacity, which is more than most standard RV air conditioners, to help bring the cabin back to a comfortable level. It moves air at 270 CFM, so if you are replacing an existing system, that airflow number is worth comparing to your current AC, especially if your RV uses ductwork to carry cooled air to other rooms.
A traditional RV AC often cools hard, shuts off, then waits for the cabin to warm back up before starting again. That can make the RV feel too cold near the unit and too warm a few minutes later. Variable-speed cooling works more like cruise control for your cabin temperature. It adjusts output as conditions change, helping the RV stay closer to the temperature you selected instead of bouncing between warm and cold.
Starting the AC's compressor is usually the hardest moment for campground power, a generator, or an inverter setup. The included soft-start technology helps lower that startup demand by letting the inverter-driven compressor ramp up gradually instead of hitting full load all at once. The system operates on 115 VAC power, making it a better fit for RV power setups where the AC can run, but startup is the part that needs extra help.
The included air distribution box helps adapt the system to the way your RV already moves air. In a ducted setup, it routes cooled air into the ceiling ductwork so it can travel to vents around the cabin. In a non-ducted setup, it distributes air directly from the ceiling assembly. The 360-degree airflow pattern helps spread cooled air through the main cabin area instead of dumping it in only one direction.
Instead of relying only on controls at the ceiling assembly, this system includes a wall thermostat for easier temperature adjustments from inside the RV. The thermostat connects to the rooftop unit with the included 25' cable, giving you a dedicated control point for managing cabin comfort.
Long cooling days, humidity, road vibration, and outdoor exposure can be hard on rooftop equipment. The hydrophobic-coated coils are designed to shed water faster, helping maintain airflow and reduce the chance of freeze-up when conditions are right for icing. Underneath, the powder-coated steel base pan gives the rooftop unit a durable foundation for travel, weather, and regular use.
Even with the rooftop unit, air distribution box, and thermostat included, installation still means lifting the AC onto the RV, sealing the roof opening, and connecting the system correctly for your ducted or non-ducted layout. If you'd like help installing your air conditioner, check out our Installer Locator to find an installer near you.
Ratings & Reviews
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Jerry B.
8/26/2026
Hey Don! Thanks for sharing your experience. I’m sorry this unit hasn’t met your expectations, especially during 105-degree weather. RV air conditioners will typically cool the inside of a trailer up to about 20 degrees below the outside ambient temperature, so with temperatures that high, seeing interior temps in the mid-to-upper 80s can be normal depending on direct sun, insulation, and the size of the trailer. That said, the limited airflow from the ceiling assembly and the thermostat behavior you described are definitely worth checking. If you haven’t already, please reach out to our Customer Service team so we can help make sure the ceiling assembly, ducting, and thermostat are all set up correctly and rule out any installation issues.