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Old 01-16-2014, 12:21 PM   #11
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Due to storage height restrictions I had a low profile on my last trailer. New trailer has standard height unit. Both 13500btu. I don't notice a considerable difference in noise or cooling from either unit and both are ducted the same.

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Old 01-16-2014, 03:33 PM   #12
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Old 01-16-2014, 06:20 PM   #13
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On my 5er my 13.5 is alot louder than my 15
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Old 01-16-2014, 10:07 PM   #14
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Old 01-17-2014, 07:45 PM   #15
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low profile AC, problems with noise

We have the Dometic Penguin II low profile 13.5 AC in the front bedroom of our 2013 Columbus 320RS. The initial AC unit was like having an airplane take off in terms of noise level at the head of the bed when the compressor came on at night. The RV tech we had come and look measured the amp draw of the compressor and said that it was defective... changed out AC's on warranty. The 2cd unit is maybe a little quieter. The RV tech said that the low profile units have the compressors mounted horizontally and that when you turn the compressor on its side it makes the unit vibrate more and therefore makes it noisier.
Like one prior poster stated, we use the bedroom AC during the day in the Texas summers, but always run the living room unit alone at night because of the noise. In researching the Penguin II, I found a lot of discussion of the noise with the penguin II and Dometic came out with a soft grommet kit to address the problem in older units, but I don't think they've made much of an impact. If the regular profile 13.5K unit is as quiet as the 15K regular unit in the living room, I would gladly sacrifice a few inches of clearance to have a quieter AC in the bedroom.
Hope this helps.
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Old 01-17-2014, 08:56 PM   #16
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Checkout these restrictions.

We traveled 95 to FLA and passed thru Height Measurement Sensors, It may have been Georgia. You will not go thru the Chesapeake Bay Bridge Tunnel if you are over 13 feet 6 inches

Had to replace the Brisk Air II with a Penguin II both 13.5 KBTU to be under 13 feet 6 inches. We had ordered the low profile but ...
Set our hitch down to 15 inches and raised the pin box up all the way. The bed clearance is 7.5 inches. We are now under 13 feet 6 inches but not by much.

AC noise difference? They are both too noisy to sleep under. Use bedroom AC while downstairs via ceiling duct and no need to increase TV volume. Run the main AC at night.
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Old 01-18-2014, 03:22 PM   #17
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I added a regular 15k unit to my front bedroom and have used both units at night once. I ducted it too, so that helps with noise some. 30k btu will freeze you out, if wanted, even when it was 105 with no shade. I have a 39' fiver
with three slides.

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Old 02-02-2014, 02:09 PM   #18
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When I was ready to make the deal on my Columbus 365RL, I had one dealer tell me they only order standard A/C units due to the noise. I told him I was looking at another RV (Same Model) at a different dealer with a low profile Dometic. He suggested I listen to this unit. Went to the dealer and had the A/C on and it sounded like a freight train coming along in the bedroom. I had the dealer swap out the low profile for the standard (15K) unit. My DW and I are very happy that we did this. Big difference in the noise level!!! Puts me at 13'7"on the TV.

Cajun Happy
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