Replacement AC System for a Dometic Brisk 99516761
Updated 06/06/2026 | Published 05/30/2026
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Question:
Hello I have always 2010 heartland sundance xlt 5th wheel with Dometic ac unit model 99516761, it is a ducted system and ceiling flter cover and vent along with 6 pin connector. Looking to replace it with a new 15000btu system, plug and play. What do you recommend? Thanks
asked by: DOUGLAS W
Expert Reply:
Hey Doug welcome back! To replace your 15,000 btu Dometic Duo-Therm, I recommend the Advent Air RV Air Conditioner System item # ADV99QR in white or item # ADV69QR in black for a ducted setup. The Advent Air RV Air Conditioner System item # ADV39QR in white or item # ADV49QR in black are what you will need for ductless.
There's no way to just replace your AC unit, you'll need to replace all your AC system components. This is due to the EPA changing the regulations on the refrigerant in the AC units at the beginning of 2025. They've been upgraded to R32 and your Dometic Brisk has the now obsolete 410a refrigerant. None of the 410a components are compatible now with the newer systems. You will be able to use the existing wiring to power the AC system and connect the new thermostat if yours has one.
The Advent Air RV Air Conditioner System item # ADV99QR in white or item # ADV69QR in black are 15,000 btu systems that include an air distribution box that works in both ducted and ductless orientations. They also come with a thermostat.
The Advent Air RV Air Conditioner System item # ADV39QR in white or item # ADV49QR in black for ductless setups do not include a thermostat.
Does your current AC system have a thermostat? I'm just trying to dial in the right system for you. We've got quite a few replacement options and I understand swapping out everything to replace an older AC unit wasn't what you had in mind.
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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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Douglas W.
6/4/2026
Jerred H Yes my system has a thermostat and air distribution bos for ducted system. I don't mind changing everything but I want everything here when I start, if you know what I mean. We are full time rvers stationed in South Texas right now. Doug