Dometic Brisk II / Brisk Air Rooftop A/C Conversion Kit

If your rooftop air conditioner has quit and you'd rather not re-cut the roof or re-run ductwork, this Dometic conversion kit is the part that makes the swap clean. It adapts your RV's existing single-zone ducted setup so you can drop in a Dometic Brisk II, Brisk Air, or FreshJet unit in place of the rooftop A/C that came off. You keep the opening you already have. You keep the ducting in the ceiling. You keep the thermostat wiring runs. The kit bridges the gap between your old control wiring and the new Dometic unit so everything talks the way it should.

Here's the situation it solves. RV rooftop A/C units don't all wire up the same way. When you swap a unit from one manufacturer for a Dometic ducted model, the low-voltage control connections often don't line up out of the box. That's where this kit earns its keep. It includes the conversion wiring that hooks the new Dometic unit into your existing 6-wire control box, so the thermostat you already have can run the new compressor and blower without a lot of guesswork up at the ceiling.

This is a ducted, single-zone cool application. If your coach has a return-air grille in the ceiling and supply ducts running front to back, that's the setup this kit is built for. You'll reuse the roof opening and the ductwork that are already there, which is the whole point. Re-cutting a hole in a fiberglass or aluminum roof is a job nobody wants to take on if they don't have to, and this kit means you don't have to.

A quick word on what this kit is and what it isn't. It's the adapter and wiring, not the air conditioner itself. You'll still need a compatible Dometic ducted unit, a Brisk II, Brisk Air, or FreshJet, to finish the job. Think of this as the piece that lets the new unit speak your coach's existing language instead of forcing you to tear into the ceiling and start over.

Who's this for? Anyone replacing a dead or noisy rooftop unit who wants the cooling back without a full rebuild. It's common on travel trailers and fifth wheels where the original A/C has run its miles and parts are getting hard to find. Instead of chasing a discontinued unit, you fit a current Dometic ducted model and use this kit to make the old control side work with it. That keeps the install to an afternoon on the roof rather than a weekend of fabrication.

Before you order, do a couple of quick checks. Confirm your system is ducted and single-zone, since that's what this conversion covers. Match the cooling capacity of the new Dometic unit to what your coach needs, and make sure your existing breaker and shore power can carry it. And take a look at your control box up top so you know you're working with the 6-wire setup this kit is designed to adapt. A few minutes with a meter and your owner's paperwork saves a lot of second-guessing later.

Installation is well within reach for a handy owner who's comfortable working on the roof and making low-voltage connections, though plenty of folks hand it to an RV tech and have it done in short order. Either way, the kit ships with the conversion wiring you need to tie the new unit into your existing controls, so the new Dometic A/C runs off the thermostat and ductwork you've already got. It's a straightforward way to get cold air moving again without reinventing the whole system.