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Old 06-15-2024, 10:40 AM   #1
LGC
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Leveling an Air Conditioner on Sloped Roof

I am considering upgrading my a/c and am concerned about efficiency on the sloped roof of my 5er. Where the a/c sits it is sloped about 10 degrees. Most manufacturers say up to 15 degrees is okay. However, I have seen 5 degrees recommended. It makes sense that the more level the better the compressor will function.
So, should I level and if so how? I figure that to compensate for the 10 degree slope would require I raise the rear of the a/c about 2 inches and I have not found a product or information that would accomplish this.

Any thoughts?
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Old 06-15-2024, 10:55 AM   #2
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Quote:
Originally Posted by LGC View Post
I am considering upgrading my a/c and am concerned about efficiency on the sloped roof of my 5er. Where the a/c sits it is sloped about 10 degrees. Most manufacturers say up to 15 degrees is okay. However, I have seen 5 degrees recommended. It makes sense that the more level the better the compressor will function.
So, should I level and if so how? I figure that to compensate for the 10 degree slope would require I raise the rear of the a/c about 2 inches and I have not found a product or information that would accomplish this.

Any thoughts?
If the ac installation guide line say 15 degrees take yes for an answer and donít over think it. The compressor wonít care. 15degrees is a common standard and will make no difference in efficiency. The compressor pumps the refrigerant in a gas form so the angle doesnít matter
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Old 06-15-2024, 03:40 PM   #3
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I believe it has more to do with the oil migrating back to the compressor.
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Old 06-15-2024, 08:59 PM   #4
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Originally Posted by MGD1961 View Post
If the ac installation guide line say 15 degrees take yes for an answer and donít over think it. The compressor wonít care. 15degrees is a common standard and will make no difference in efficiency. The compressor pumps the refrigerant in a gas form so the angle doesnít matter
I agree that +/-15 degrees will make little to no difference. As to the oil, it is much heavier than gas and will remain in the compressor sink thus keeping it lubricated.

Don't overthink the project. After all, the old one, to be upgraded, worked for how many years?

Bob
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Old 06-15-2024, 09:48 PM   #5
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We installed an additional ac unit in the bedroom of our 315 pack 12 on the front slope. At this moment I don't remember the manufacture however installation instructions stated max tilt of 5 degrees. I thought that was odd and as I already had the unit I ignored it. The unit seems to work ok.
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