Can Advent Air AC Unit be Added as Second AC for 2017 Grand Design 303 RLS
Published 05/04/2026
Question:
My 2017 Grand Design 303 RLS has original ac. iT WORKS FINE.I want to add this unit to the front with currently has a fan. I want to add it to existing ductwork. Is this ok? Also I understand 2 thermos and thats ok due to technology.
asked by: Mark
Expert Reply:
Hey Mark, you can use the Advent Air Low Profile RV Air Conditioner System # ADV74QR in place of the fan you have in your 2017 Grand Design 303 RLS but due to changes made in 2025 for RV AC units there would be no way to integrate this into your current AC's controls/thermostat. It would only be able to be controlled by the included thermostat which would be independent of your other system. What other AC do you have currently?
Product Page this Question was Asked From
Advent Air RV Air Conditioner - 15,500 Btu - Ducted or Non-Ducted - White - R32 - AC Unit Only
- RV Air Conditioners
- AC Unit Only
- Cool Only
- 15500 Btu
- Standard Height
- Single Zone
- Rooftop
- Ducted
- Non-Ducted
- White
- Advent Air
more information >
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Mark
5/4/2026
I have the original Dometic I believe from the factory