A full-power 13,500 BTU rooftop air conditioner in a slimmer low-profile housing -- engineered for RVs where aerodynamics and campsite clearance matter. The ACM135LP fits the industry-standard 14-1/4 x 14-1/4 in. roof opening, making it a straightforward replacement or upgrade for most Class A, Class C, and fifth-wheel applications.
The Advent Air ACM135LP delivers 13,500 BTU of cooling capacity -- the most common RV rooftop AC rating -- while sitting lower on the roof than conventional units. That lower roofline profile reduces wind drag at highway speeds and lowers the center of gravity slightly, both practical benefits for towable and motorized rigs alike.
With a 500 CFM airflow rating, the ACM135LP moves enough air to cool a mid-size to large RV interior effectively. The unit features a built-in condensation dispersion system that distributes collected moisture across the condenser coil, improving efficiency and reducing water pooling or dripping issues common on hot, humid days.
Full-power cooling for mid-size to large RV interiors up to roughly 400-500 sq ft.
High-volume air movement for faster cool-down and even temperature distribution.
Shorter rooftop height versus standard-profile units -- less wind resistance on the road.
Routes condensate over the condenser coil to improve efficiency and reduce drip.
The ACM135LP is designed around the industry-standard 14-1/4 x 14-1/4 in. roof opening used on the vast majority of RVs. If your current rooftop AC uses a standard 14 x 14 in. cutout, this unit is a direct-footprint replacement. No cutting or patching required in most installations.
Note: A separate compatible thermostat or control kit may be required depending on your existing wiring and control setup. Confirm compatibility before ordering.
The ACM135LP mounts through the existing 14-1/4 x 14-1/4 in. roof opening and bolts down with the included hardware through the interior ceiling assembly. Standard installation requires two people -- one on the roof and one inside -- to align and secure the mounting bolts. The foam gasket seals between the unit base and the roof surface.
A 13,500 BTU air conditioner draws approximately 12-15 amps at 115V AC at startup and 8-12 amps running. Ensure your RV's electrical system and campground pedestal or generator can support the load. Soft-start modules (sold separately) can reduce startup amp draw significantly for generator or multi-AC setups.