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Old 05-21-2022, 09:33 AM   #1
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Separating 2 acís

Back with another question! This group has saved me soooooo much time effort and money it has become the first place I go for answers. Thanks to all of you!!

Now the question. I have a holiday rambler dp with front and back ac units. I can run both from my 7.5 Oman generator. However for boondocking on hot days/nights I would rather just use one. I can run either one from my 2200 Honda generator very efficiently.

I would like to be able to separate the front and back sections of the coach to save energy (air condition the front only during the day and the back only at night for sleeping). I have a door between the sections like many do.

The issue is this. Both ac units are installed outputting to a single duct that runs the length of the coach. When either ac is running on its own it cools the entire coach. I would like to block the duct near the door so I can effectively separate the ac units.

Has anyone tried this? How did you do it? Is it a mistake?
I am thinking of removing the duct nearest the door and stuffing a piece of memory foam in there behind the duct.

Any advice from the experts, or amateurs like me on here?
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Toronto, Ontario, Canada.....well some of the time.
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Old 05-21-2022, 09:36 AM   #2
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I jammed an old T shirt in the duct.
Doug and Renee Tallman
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Old 05-21-2022, 10:07 AM   #3
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Yeah, I've read of a few members using styrofoam or something to separate the zones.

I don't cause I like to run the front unit during the night. With the bedroom door closed, I still get some cooling, without hearing the unit running.
Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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Old 05-21-2022, 10:30 AM   #4
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Many RVs have ceiling registers that can be opened and closed.

We use them so direct cold air does not blow down onto my DW while we drive along - also to separate our ducting between the living and bedroom <-- just as OP wants to accomplish.

We used to use dish towels... or, as suggested a T-shirt.
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Old 05-21-2022, 10:59 AM   #5
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Close the vents.
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Old 05-21-2022, 04:37 PM   #6
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If you can't open and close the ceiling vents, you can change them to ones that do.
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Old 05-21-2022, 06:54 PM   #7
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I used a small block of Styrofoam in the central duct to separate the two systems. That made a huge difference in the bedroom temperatures, which was what I was wanting.
Good Luck, Be Safe and Above All, Don't Forget To Have Fun
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Old 05-22-2022, 06:03 AM   #8
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Thanks for the answers everyone. I tried a piece of memory foam and it worked perfect.
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Toronto, Ontario, Canada.....well some of the time.
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