Looking to Replace the Dometic Freshjet 15k BTU AC on a 2016 Grand Design Solitude 375RE 5th Wheel
Updated 07/13/2026 | Published 07/05/2026
Question:
Hello I’m needing to replace my domestic fresh jet 15k A/ac on my RV 2016 Grand Design Solitude Fifth Wheel 375RE. I was under the assumption that the new furrion 18k would work in my RV but when I choose my model RV all it shows is advent ac units.
asked by: Brian R
Expert Reply:
Hey Brian, happy to help!
The reason you're only seeing Advent Air replacement options is because your 2016 Grand Design Solitude came equipped with a Dometic FreshJet AC. The Advent Air units are replacement rooftop units for many older Dometic R410A systems and with the correct adapter, it would allow you to reuse your existing air distribution box and controls.
Since you're replacing an older R410A system, I'd recommend upgrading to the Furrion Chill Cube 18,000 BTU # FR49TD. The Chill Cube uses the newer R32 refrigerant and is designed to be installed as a complete system, including a new rooftop unit, air distribution box, and thermostat. Because R32 systems aren't backward compatible with the older R410A control components, replacing the entire system guarantees everything will work together and that way you have the newer technology, quieter operation, improved efficiency and better temperature control.
What made you start looking at the Furrion Chill Cube 18k btu?
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Brian R.
7/11/2026
Got the furrion yesterday and works flawless. Now need to replace the other unit. It’s a dometic penguin ll and is also ducted it’s in the bedroom. Which furrion unit will work with it? I was going to replace it with the chill cube also but worried about height of the A/C on the front. The chill cube was installed on the rear of the RV it sits lower there.