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 # ADV54QR 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 Low Profile RV Air Conditioner System - Single Zone - 15,000 Btu - Black - R32
- RV Air Conditioners
- Complete AC System
- Cool Only
- 15000 Btu
- 115V
- Single Zone
- Rooftop
- Ducted
- Ductless
- Black
- Advent Air
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Mark
5/4/2026
I have the original Dometic I believe from the factory