When the temperature climbs, the 13,500 Btu cooling capacity gets the cabin feeling comfortable again. Large coils and airflow-boosting fins pull heat out efficiently so you can feel the air shift within minutes. With 320 CFM of airflow and R32 refrigerant that meets 2025 EPA regulations, it keeps things cool without working overtime.
No need to hunt for compatible parts or fight through guesswork. The rooftop unit and air distribution box are built to work together, giving you a complete system that installs cleanly into a 14-1/4" x 14-1/4" roof opening. Whether you’re replacing an older Dometic or Coleman-Mach setup, this matched kit makes it easier to get everything connected and running right away.
The air distribution box puts full control within reach. Simple knobs let you adjust fan speed and cooling directly at the ceiling, while front and rear dampers direct airflow where it’s needed most. When the filters need attention, the pop-out grilles make cleaning quick—just remove, rinse, and snap back in place.
When it’s too cool for comfort but not cold enough for the furnace, this system’s heat-ready design has you covered. It’s prepped for an optional 5,600 Btu heat strip (sold separately), giving you an easy way to take off the morning chill without extra gear or complicated wiring.
All-copper tubing with gas-flux brazed joints helps it stay sealed and reliable season after season. The medium-profile rooftop unit measures 38" long x 28-1/16" wide x 13-13/16" tall and weighs 79.5 lbs, keeping weight balanced while still covering older ceiling imprints for a clean look. It’s a solid upgrade that keeps comfort simple trip after trip.
Ratings & Reviews
Product arrived in 2 shipments. Upon arrival checked for damage. None noticed. Upon removal from box found small crack in cover at bottom not far from screw attachment. Most likely from shipping. This was cosmetic and would not effect function of unit. Installed unit wired and tested. Temperature reached 67 degrees in rv in about 4 hours. Much better than the 98 degrees prior to installation.
I’ve ordered many things from trailer and they have never let me down. Easy to order, fast shipping, right on time. Actually, it arrived a day early. Nice surprise.
Just got this Coleman-Mach 3 RV AC 13.5K BTU roof air conditioner installed this morning. Replaced a 16 year old non-functioning 15K Coleman. Works fine cooling a 1999 Avion 5V 38ft. 5th wheel. Single air with ducted system. Dual pane glass windows and super thick insulation. Unit is located at 7800 ft of elevation in the White Mountains of AZ. It will perform nicely in these conditions. Easy to operate rotary digital thermostat got rewired at the same location as the old switch and slide control unit. Running nicely. Thank You Will at trailer for a very smooth transaction and fast delivery! Great mobile techs did a super clean and efficient install. Shoutout to David's RV Service out of Lakeside AZ.
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