Can Advent Air Low Profile AC Unit Replace Duo Therm

Question

Question:

Need to replace Duo Therm model 630035.331. It is a ducted system. Will this a/c work as a plug and play or are other components needed?

asked by: Brett

0

Expert Reply:

Hey Brett, yes an Advent Air Low Profile AC unit can install in place of your Duo Therm but you would need the part # ADV82SR instead as this comes with a new lower unit as well as a thermostat since the Advent upper unit is not compatible with the Dometic lower units.

No other components would be needed.

expert reply by: Jameson C

0

Jameson C.

9/8/2025

Hey Brett, did the Advent Air Low Profile AC unit with the new lower unit and thermostat work out for your setup? I'm asking because your experience could help others in a similar situation.

Answer 1

Welcome back Bart, and thanks for the information! To replace your 13,500 btu Dometic Duo-Therm Penguin model 620526.321, I recommend the Advent Air RV Air Conditioner System item #ADV87QR for a ducted setup or item #ADV77QR for a ductless…

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Answer 2

Hey Mike! The Advent Air RV Air Conditioner #ADV74QR is only designed to work with an R32 setup. Your old unit is going to be R410A, so the old components won't be compatible. Since everything moved to R32 last year due to EPA regulations a…

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Answer 3

Did you use the Dometic lower vent assembly with just the top Advent? Unfortunately this type of issue is very common when mixing and matching between AC components and there isn't a great solution aside from just replacing components so that it…

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Answer 4

As you can see in the accompanying photo I have labeled for you, the outside diameter of the cap is 2-1/16 inches. The cap is meant to snap into a 1-7/8 inch hole.

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Answer 5

Hello Jeremy, thanks for reaching out. Sadly, the Advent AC #ADV29FR would not be compatible with the Duo-Therm AC system. You can still use an advent unit, but you would need to replace your thermostat, distribution box and controller as well. This…

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Answer 6

Hey Don, there is a way to replace what you have with an Advent Air 15k BTU AC unit but the part number you mentioned is only the top unit and it's not compatible with the Duo Therm lower unit that you have now. You'd have to replace the…

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Answer 7

Hello David, thanks for reaching out. It is possible to replace your Dometic AC, but all of the replacement option will involve replacing the entire AC system: rooftop unit, controller, distribution box and thermostat. With RV ACs going to the new…

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Answer 8

Hello Darrin, Sorry to hear that your Dometic Penguin went into retirement. The RV AC's went to a new refrigerant this year, they went from the R410a to the R32. You cannot mix the old R410a parts with the new R32 parts, they have made them to…

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Answer 9

Hello Dave, thanks for reaching out. The Advent Air RV Air Conditioner #ADV86SR uses the new R32 refrigerant instead of the old r410a. Any R32 unit will not be backwards compatible with r410a AC systems. The r32 refrigerant is more flammable, so AC…

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Answer 10

Hi Noel; the Advent Air Low Profile RV #ADV58SR can replace an old Dometic Brisk AC. However, you will need to replace the ADB and thermostat as well. This is an R32 unit which isn't backwards compatible with the old R410A units like that…

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Answer 11

Hey George, you can upgrade your Duo Therm to an Advent Air but you have to go with a new lower unit at same time so instead of the #ADV86SR you'd need the part #ADV92SR which comes with the lower unit as well as a thermostat. At one point we…

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Answer 12

No, it can not David. The Advent Air Low Profile RV Air Conditioner item #ADV58SR has the new R32 coolant in it, which is not backwards compatible with any components made before 2025. Additionally, we found out at the end of last year that the…

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