Air Ducts

[Cajuncamper]

I remember seeing a post concerning cold air being lost at different areas of the ductwork, and air registers. I , of course, can’t find it. If anyone can direct me to posts concerning this issue, I certainly would appreciate it. I’ve tried the search feature, but still can’t find it. Thanks for the help.

[ALJO]

we are talking here about the A/C air-ducts. Remove the vent caps in the ceiling and tape the edges with aluminum foil tape. It is simple and effective to prevent cold air loss in the ceiling.

[oldmanAZ]

To expand on what ALJO said: The primary goal is to prevent cool air from escaping from the cool air plenum into the space between the ceiling and the plenum.

When you remove the duct from the ceiling, there will be a short section of rigid plastic tubing. By removing (discarding) that tubing and taping the space, it will prevent air from escaping AND allow easier air flow from the plenum into the ceiling duct.

We did this mod earlier this year and there was a significant increase in air flow from one of our 3 ceiling vents at the rear of the trailer. I believe it was due to the plastic tube being too close to the top of the plenum and restricting air flow into that ceiling vent.

[GretasDad]

Last year I completed the suggestion of removing all the output vents in the ceiling and installing the silver A/C tape to seal them up and keep the cooled air from entering the slim cavity between the ceiling and roof. I definitely think it helped.

Another suggestion I'll drop after climbing on my roof this past week: I found that the rubber seal that is attached to the bottom of my roof AC unit where the return air is pulled back into the AC unit was not attached properly at installation and was literally blocking about a third of my return air flow. While fixing that rubber seal, I also noticed the silver A/C tape around that return cutout in the roof was missing a large section of tape which means part of my return air was leaking into the area between the ceiling and the roof.

Just something else to check next time you're on the roof!

[Cajuncamper]

Thanks a bunch guys. I will be checking and doing all of the above tomorrow. Can’t stand to lose cold air in our heat in South Louisiana. I’m sure glad I joined this forum. Tons of good info to be found by experienced RV owners.
Thanks again.

[REWahoo]

This might be what you were looking for concerning the vents: https://www.jaycoowners.com/forums/f...tml#post551273

[Cajuncamper]

Thanks REWahoo, that’s it.

[Rock]

I did my bedroom vents two years ago. I now have some foil tape in my vent so some must of come loose. Running ac full time in hot weather mine sweats a lot. Gonna reinstall the plastic rings but ensure they are not sticking up into the plenum to far. Two years ago I also found that piece separating the chambers fell over causing my unit to keep cycling compressor. Jayco told me it was a production issue they fixed.
Rock

[AZ Winters]

How to remove ceiling air duct director

[Buzzsaw]

If yours are round you have to pry them off and they snap back on

[Buzzsaw]

Also if can check out a/c coils this is what my 5 month old camper looked like when I opened it up

[AZ Winters]

Thanks. Too easy. But easy to break if you don’t see how they are supposed to work!

[kirkelli]

One "HUGE' area for cold air loss I found is through heater return air vent, which vents back into the basement on my 32RSTS.. My returns 'were' built into the two steps into the bedroom stips. I plugged the upper vent and installed an adjustable metal vent on the bottom. In the Winter, i open it up for the heat return, in Summer i close it for the AC use.. Defiantly a huge improvement i keeping the living area cool in the summer.

[Buzzsaw]

I like that idea I have not thought about closing that off

[kirkelli]

Originally Posted by Buzzsaw

I like that idea I have not thought about closing that off

you can throw a towel for a temporary closer.. But after awhile the wife will yell at ya :-)