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Old 07-06-2017, 04:39 PM   #1
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Older A/C Mods for better performance

There was a thread quite awhile back about how to get better performance from our roof top ac/c units. Mine are working good but I wanted to find the post, if you have it could you please post the link for me. I remember it involved insulating some of the tubing on the unit and adding some type of heat deflector material.

I have searched and can't find it, thanks in advance.
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Old 07-06-2017, 05:01 PM   #2
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I did it to mine. I think i posted it in the mods to 377 thread.

Basically you add extra pipe insulation to the exposed copper lines and wrap the inner "box" with reflectix.


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Old 07-06-2017, 05:11 PM   #3
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Quote:
Originally Posted by Magnolia Tom View Post
I did it to mine. I think i posted it in the mods to 377 thread.

Basically you add extra pipe insulation to the exposed copper lines and wrap the inner "box" with reflectix.


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Thanks for the response.
Do you feel like it made a difference?
Mine are working real good I just thought a little extra couldn't hurt.
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Old 07-06-2017, 05:17 PM   #4
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My ACs were new. I don't think it made that much difference to be honest but I already had all the supplies laying around so I figured I couldn't hurt. I think it works best on older units. Don't forget to seal all your seams/joints on the box with foil tape. That way all the cold air doesn't escape


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Old 07-06-2017, 05:26 PM   #5
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Here you go
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Old 07-06-2017, 06:15 PM   #6
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Quote:
Originally Posted by dewey405 View Post
Thanks Dewey405, that's the same info. Different forum but exact same info.

Thanks again
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Old 07-06-2017, 09:59 PM   #7
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Here's another bit of a crazy mod that I've done in the past. This was on our 40' / 4-slide rig with 2 dometic 15k units. This improved the air flow, or cfm. The teepee directs air flow directly to the ducts instead of the air turmoil in the distribution area, thus more directed / efficient air flow off of the blower. It kind of deems your quick cool useless, but we were full timing in this one, so we didn't need the quick cool feature. We've also took pipe insulation, or pool noodle type stuff and blocked ducts off at the end of a duct run. Never know if they sealed the end good or not, so we made sure. On our class C, it was obvious the duct run was leaking at the end, so blocking the duct off just after the last register proved to work.

I never understood the circular / race trace dual duct system. It's more of a sales gimmick than an effective system in reality. Either way, the 40' rig would maintain 70 deg in 100 deg direct sun, only AFTER these modifications.

On our present rig, not necessary. The mods we've done so far have helped us maintain 70 in 100 deg direct sun.
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AC Deflector 1.jpg   AC Deflector 2.jpg  
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Old 07-07-2017, 11:15 AM   #8
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Thanks BigJohn, sounds like useful info. I would have never thought of blocking the ends of the duct runs, just in case.
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