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Looking For A 48V Replacement AC Unit For My Dometic DuoTherm  

Updated 01/08/2026 | Published 01/07/2026

Question:

Is there a 48VDC rooftop RV inverter air conditioner that uses ducted ceiling vents not direct dump available on the market? Im trying to replace a rooftop Dometic DuoTherm central AC unit that is ducted. Thank you, any help would be appreciated.

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Expert Reply:

Hey Thomas,

We have a couple 48V units available but all of them are ductless units like the Velit # VE39QV. The other units we carry that are ducted are going to be the typical 115V units like the Advent Air # ADV92SR. I am not aware if there is one out there on the market exactly like what you are looking for, but we just have the ductless options.

What kind of trailer are you replacing the unit on?

expert reply by:
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Nick S
Thomas W. profile picture

Thomas W.

1/7/2026

Thank you for the quick response Nick! I hope someone may know if it exists, but sadly I think it will remain a unicorn. 1999 Nu-Wa Snowbird SE 102 Series M-35+2 RLTG I like those Advents. I installed one in the kitchen roof vent at the rear of the trailer. It kicks out a lot of air to help the central AirCon keep the main cabin 78 degrees on a 108+ day in Phoenix. Unfortunately between the two jet engines above, you can't have a conversation or watch TV. But I am comfortable and when at home in the daytime I usually hang out in the front bedroom seating area where it is much quieter.

Nick S. profile picture
Etrailer Expert

Nick S.

1/8/2026

@ThomasW The Advent units are definitely great at what they do, but the sound is a downfall so I understand that. I am going to dig around and just see if there is such thing out in the market, but for now the ones we have are the ductless.

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