Replacement AC System for a Dometic Penguin II 11,500 Btu Air Conditioner
Updated 09/12/2025 | Published 08/22/2025
Question:
Hi... I have a Hymer Aktiv with a Dometic Penguin II 11,500 btu non-ducted air conditioner with Dometic wall thermostat. What would be a suitable like-for-like easy to install replacement air conditioner to update the current Dometic low-profile unit? Thanks...
asked by: Jeff S
Expert Reply:
Hey Jeff, thanks for the information! To replace your Dometic Penguin II AC you'll need to replace the entire system. We've found recently that the harnesses and connectors from different manufacturer's don't work well with each other and you'll void the warranty by mixing and matching them. Additionally, the new R32 refrigerant, which is far more efficient, also makes AC components made before 2025 incompatible with the newer compliant units.
For a replacement AC system, I recommend the Advent Air Low Profile RV Air Conditioner System item # ADV52SR in Black or item # ADV65SR in white. These are 13,500 btu low profile AC systems that include an air box, start capacitor, and thermostat. The AC measures 31" long x 24-15/16" wide x 10-1/8" tall so it'll work great on the roof of your Hymer Aktiv and you'll be able to use your existing wiring and cutout.
What year is your motorhome?
(click to enlarge)
Jeff S.
9/12/2025
2018 Aktiv 1.0 on a 2017 Promaster 2500 chassis.
Jerred H.
9/12/2025
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Jerred H.
9/12/2025
Hey Jeff, did you have a chance to check the year of your Hymer Aktiv? I'm asking so I can continue assisting you with finding the best replacement option for your air conditioner.