Solution for Needing Replacement RV AC Unit for Dometic

Updated 09/22/2025 | Published 09/12/2025

Question:

I am replacing a dometic 13500 BYU unit. Will this one work ?

asked by: Michael B

Dometic AC Unit
(click to enlarge)

Expert Reply:

Hey Michael, we can help but we don't have any RV AC unit top units that are going to work with the air distribution box you have currently. At one point we thought the Advent Air top units worked with Dometic ADBs but that is not true. So you'd need to replace the entire system like with the # ADV25SR or see if Dometic could get you the upper unit you are in need of.

expert reply by: Jameson C

Michael B.

9/19/2025

ADV25SR looks like it also has a mounting kit. Does it work with a duct system ? Can it be connected to existing dometic thermostat ?

Jameson C.

9/22/2025

@MichaelB The Advent Air part # ADV25SR does come with a lower air distribution box that was intended for a ductless setup so the box it comes with has the thermostat controls built into it and does not have ability to be used with a Dometic thermostat. For a similar setup that was designed for ducted setups we have the part # ADV52SR which comes with a wall thermostat and the correct ADB. This would be your best solution.