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Old 06-21-2019, 04:31 PM   #21
2 Yoopers
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M.O.C. #21800
I did the pvc in the return vents, that helped the flow a lot. I also purchased the Jet Stream air out vents from dwincorp.com. They offer them in a same size direct replacement style with a shorter inner sleeve that does not protrude into the narrow duct to far.
They also offer a larger version which is what I used. I removed the old restrictive vent and sleeve. Traced a line showing the bigger hole needed on the ceiling.I used a dremal with a straight 1/8 carbide cutter to easily cut through the ceiling and the duct.
I then used the aluminum duct tape around the hole and duct. I installed the new sleeves and snapped the vent on and air flow greatly improved.
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Old 06-24-2019, 09:49 AM   #22
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thanks for the link - interesting vendor
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Old 06-24-2019, 05:29 PM   #23
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We live in the ideal test bed for A/C units (open desert just north of Carlsbad, NM. IE: no shade consistent temps above 100F for months).


Taking our cues from this forum and good neighbors in the same park, we used 1 1/4" PVC pipe cut slightly shorter than the return vents on our front A/C unit to open up those vents. We then cut every other fin off the existing discharge vent covers. This alone allows our 42' 381TH to stay about 20F below outside temp.


Out of an abundance of precaution and to ensure the safety of our two Chihuahuas while we are at work, we bought a large portable A/C from Wal Mart ($350). It sits in the kitchen area and we set it to higher temp as a backup just in case. The exhaust hose is directed to a smaller window on the slide and I routed an extension cord from the power pedestal directly to the unit. That way if the 50amp and or coach power goes down we still have the back up to save the pups if there is power to the pedestal 110plug. In addition we bought a TempStick temperature alarm that both emails and texts us both if temps get too high.


We do plan to replace the portable third unit with a third roof A/C installed into the power vent in the kitchen at some point. But like the portable, I plan to wire that unit completely separate from the rest of the coach. Doing so also will allow us to use two A/Cs with no issue at a campsite that is 30amp main power in the future.


In summary, you can keep these trailers cool if you have ample air circulation. Anything you do to improve airflow is going to help!
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Old 06-25-2019, 10:39 AM   #24
BandBmalin
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One suggestion I haven't seen mentioned that helped me out a lot in my last travel trailer was putting a piece of a pool noodle just past the last vent on each end of the trailer. I've not yet looked inside these runs yet, but in my TT, the main air channel in the ceiling ran from one end to the other with vents along the way to let the air out. By using a piece of pool noodle right after the end vents on each end of my trailer, I got MUCH more air flow since the air wasn't going down past my vent and doubling back. I later swapped out my vents with high flow versions like others have suggested. (Did the pool noodle trick in my son-in-laws TT with great success also!)
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