Incredible noisy AC, any solutions in sight.

[Nick and Linda Stratigakis]

Last week we were camping at a TX state park for our first outing since April. Around mid day the temperature was well over 93 degrees and we decided to turn the AC on. Had forgotten how loud this thing was but we had no other choice. Shortly thereafter a family with 3 children camped next to us in a tent. The next morning the neighbor ( visiting from Holland) came over, introduced himself, very polite and very respectful and asked if we could turn off our AC because they did not sleep the night before because of the noise. In desperation I started looking for options and decided to go to a close by Walmart store. They had a 6000 btu portable unit and looking at the size and measurements looked OK to me. Installed it at the very back between the two beds with the air exhaust and the moisture drain through the back bottom door, plugged in and it was an instant relief, noise level was very low, low enough to have a conversation and listen to the radio. Next morning my Dutch neighbor came over to thank me for not using the AC. Will try to improve the installation by building a removable “door” for the left rear storage compartment with an opening large enough to accommodate the AC exhaust and prevent potential critters coming in. 

[katanapilot]

Not really new news, unfortunately.  Plenty of discussion on this forum about the Dometic and high noise levels.  Many have now converted to quieter units.   Good place to start your research is a post from several years back here

[jd1923]

3 hours ago, Nick and Linda Stratigakis said:

Had forgotten how loud this thing was but we had no other choice.

Yeah, the OEM Dometic A/C is a horrible POS and to not bother your next neighbor, and to get some sleep yourself, you will eventually replace it (sooner rather than later).

Search on this Forum for keywords like Atmos, Tosot, Turbro, Greenland and Pioneer, maybe even Houghton is still viable (nice if Houghton brings an inverter A/C to the states).

[Ronbrink]

12 hours ago, Nick and Linda Stratigakis said:

They had a 6000 btu portable unit and looking at the size and measurements looked OK to me. Installed it at the very back between the two beds with the air exhaust and the moisture drain through the back bottom door

I did the same with a portable air conditioner given me and generally used when working in confined spaces, garage or shop for heat relief. Shown here being used in the Oliver, vented out the side window, when replacing the noisy Dometic Penguin ll last summer. Useful in a pinch, but certainly wouldn’t want to travel with one and endure the encumbrance! Unlike the DPll, my Atmos replacement is quite both in and out; oftentimes I can’t even hear it running when outside the trailer, so don’t think all RV rooftop air conditioners are created equal. 

[Rivernerd]

We also own a 2022 Elite II, Hull #1291.  Having read too many posts on this forum about the Demonic AC unit sounding like a jet taking off, and that Oliver was making the much quieter Truma AC unit available on 2023 models, we opted to postpone our delivery from September to November of 2022 to get a Truma.  We paid a premium for the upgrade, but we have not regretted our choice.  Although expensive,  in your shoes, I would schedule an appointment with the closest Oliver dealer to swap the Demonic for a Truma.

If you have strong handyman skills, you can consider a DIY install. with one of the brands referenced in jd1923's post above.  There are informative threads on this forum with detailed "how to" instructions.

And, please update your footer to include your Hull #, tow vehicle and other important data, like you see on the above posts.

[Patriot]

20 hours ago, Rivernerd said:

I would schedule an appointment with the closest Oliver dealer to swap the Demonic for a Truma.

 

@Nick and Linda Stratigakis

We had the Truma retro fit done by Oliver Service a few years ago and really like how quiet and efficient our Truma Aventa is. To my knowledge, Oliver Service is the only place the Truma retro fit can be done due to the installation of the fiberglass base that the Truma is mounted on. The mounting foot print of the Truma is different than the “Demonic” deafening jet engine and requires this fiberglass work for the Truma to be mounted properly. The added fiberglass base Oliver installs is exactly like the same required fiberglass base used on a brand new Truma Aventa equipped Oliver.

Oliver Service did a stellar job on our Truma install. I highly recommend the optional Truma Aventa control panel for anyone considering this mod. This panel controls both the Aqua go on demand hot water heater and serves as a back up to the AC remote should the remote ever fail. The Truma Aventa also uses the existing internal OEM condensate line which I preferred vs condensate water running off the roof of our Oliver. The Truma also has a night mode which also allows it to run really quiet while outside the camper. A quick call to Oliver service will get you an emailed quote if you go this route. 

Happy super quiet Truma owners here!

Edited Tuesday at 12:30 PM by Patriot

[Skipster]

On 9/13/2025 at 4:57 PM, Nick and Linda Stratigakis said:

Last week we were camping at a TX state park for our first outing since April. Around mid day the temperature was well over 93 degrees and we decided to turn the AC on. Had forgotten how loud this thing was but we had no other choice. Shortly thereafter a family with 3 children camped next to us in a tent. The next morning the neighbor ( visiting from Holland) came over, introduced himself, very polite and very respectful and asked if we could turn off our AC because they did not sleep the night before because of the noise. In desperation I started looking for options and decided to go to a close by Walmart store. They had a 6000 btu portable unit and looking at the size and measurements looked OK to me. Installed it at the very back between the two beds with the air exhaust and the moisture drain through the back bottom door, plugged in and it was an instant relief, noise level was very low, low enough to have a conversation and listen to the radio. Next morning my Dutch neighbor came over to thank me for not using the AC. Will try to improve the installation by building a removable “door” for the left rear storage compartment with an opening large enough to accommodate the AC exhaust and prevent potential critters coming in. 

We live near bozeman, mt and had our dometic ac removed snd replaced it with an atmos.     Used it a lot this summer.  Super quiet and we are very happy now