Best Replacement AC for Dometic Duo Therm 57915.531
Updated 05/28/2026 | Published 05/24/2026
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Question:
What is the best option for replacing my AC unit duo therm 57915.531. I plan to replace myself and would like a direct replacement so I do not have to change wiring and thermostat
asked by: Keith D
Expert Reply:
Hey Keith! I can definitely help you find a replacement for your Dometic Duo Therm. However, you're going to have to replace the thermostat and air distribution box as well.
Your current setup is for R410A and everything switched to R32 last year following EPA regulation. The new AC units operate at different pressures and temps, and communicate differently, so they aren't backwards compatible with your current setup.
If you want the new 15,500 Btu Advent Air AC you looked at that would be the # ADV99QR (White) or # ADV69QR (Black) for the complete system. This includes the ADB and wall thermostat, with a capacitor # ACMSCKIT and remote # ADV67QR available separately.
If you want the absolute best replacement that would be the Furrion Chill Cube. The Chill Cube takes advantage of the R32 and uses a variable speed compressor. This makes it incredibly efficient and quiet. You can choose from the following based on ducted/ductless and color:
-Furrion Chill Cube RV Air Conditioner w Air Distribution Box - Ductless - 18,000 Btu - Black # FR27TD
-Furrion Chill Cube RV Air Conditioner w Air Distribution Box - Ductless - 18,000 Btu - White # FR59TD
-Furrion Chill Cube RV Air Conditioner w Air Distribution Box - Ducted - 18,000 Btu - Black # FR39TD
-Furrion Chill Cube RV Air Conditioner w Air Distribution Box - Ducted - 18,000 Btu - White # FR99TD
The Chill Cube is really easy to install, and uses a remote that also acts as the thermostat. Heat pump models are also available if that is something you're interested in.
What kind of trailer do you have?
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Product Page this Question was Asked From
Advent Air RV Air Conditioner System - 15,500 Btu - Single Zone - Ducted - White - R32
- RV Air Conditioners
- Complete AC System
- Cool Only
- 15500 Btu
- Standard Height
- Single Zone
- Rooftop
- Ducted
- White
- Advent Air
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Keith D.
5/28/2026
I have a 2006 Keystone Cougar camper. I do not have the inner serial number on me as we speak