Can Dometic Ducted AC Unit With No ADB Be Replaced With A Furrion AC With Typical ADB?
Updated 04/24/2026 | Published 04/17/2026
Question:
I have a 2020 heartland big horn with a duck system. There is no box in my ceiling. It’s all ductwork. I would like to get rid of the dometic unit I have a cc thermostat. I do not wish to run wiring. What do you think
asked by: Dan
(click to enlarge)
Expert Reply:
Hey Dan, thanks for reaching out. So with those ducted AC systems that don't use a typical distributions box, they can only be replaced with an identical AC system. There isn't an easy or clean way to replace it with a Furrion system that uses a typical ADB. So it is possible to replace your AC, but only with another identical unit. That's the only way to keep the ducts, thermostat, and wiring unchanged.
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on RV Air Conditioners
Roger H.
4/24/2026
Not true Jesse, I have replaced both my Dometics with Furrion Chill HE units and added a third. I live in Texas and it gets hot here. I took the coleman coleman conversion kits and drilled holes in the blocks that come in the kit and lag bolted them to the frame of the ac opening in the roof. I placed then upside down so the threaded hole were facing up. Then I drilled out the threaded nuts in the ac unit itself (where the bolts would normally thread in from the bottom) so I could put the bolts in from the top down. My old Dometic didn't have a traditional control box so I had to order a units with a control box and thermostat. The Dometic thermostat is not compatible. I have 3 Furrions on top of my RV now and they keep my place cool even on the Texas Gulf coast. Hopes this helps.