So we got a new to use Grand Design Imagen Travel Trailer with a bunkhouse. We love it. We are still working on and solving problems that come up but one that is causing us a bunch of discomfort right now that we can't seem to get a handle on is the AC and its temperature. Ideally, we would like it to be 74 all over the trailer. In the main area, the BH and the main bedroom. Now we do understand that we may not be able to get that kind of precision, but we we have now is uncomfortable. We have 1 AC unit in the main area that is "ducted". There are vents in the bedroom, bathroom, kitchen, and bunkhouse. So far we have not been too hot. Quite the opposite. The thermostat is set on 74, seems a good place to start as that's the temp we want. In the kitchen it's 70 in the master beedroom it's 64, in the bunk house it's 68. I don't want to know what the bathroom is, it's downright cold)So, seems like a no brainer, just set the thermostat to 78 and be done with it. But no, if I set it to 78 then the kitchen area gets up to 78 while the other areas stay quite a bit colder. It seems like a good answer would be to restrict the vents in the colder areas and "open" the vents in the warmer ones until everthing equals out, more or less. But the vents don't close or baffel (except the one on the AC unit it's self that cools that main area very quickly), Are there vents that can baffle in the other rooms and are they safe to use? If not, how can we achive a more or less simular tempature throughout the TT?

You can pull the covers off the ceiling ducts and place a lid from a deli container with smaller hole cut in it to decrease air flow in cold areas-then replace the duct cover. This will help balance the AC throughout the trailer. Have done this in all our trailers and it really works.

Are you sure those other vents can't be closed off some? The round vents push in and pull out. If they are non-adjustable rectangle metal, just replace them.

No expert here, since we rarely ever use our RV A/C. But I'll throw in anyway.No harm will be done if you restrict, or even close, any duct registers you choose. Within reason of course, but the vents on the bottom of the A/C itself should be plenty of flow by themselves.Do you have the round registers, or rectangular. I haven't seen the round ones with flow restrictors, but there might be. The rectangular type usually do have them. But regardless of what type, you can easily restrict the flow. Just block some or all of the slots in the register. Use whatever type of tape that suits your décor preference.If your goal is more even temperature throughout, the key is usually to push the air to the farthest ducts, and force it to flow back to the return at the main A/C. It's called Forced Air. Ideally the air flow should pass the thermostat location. And that is why they are most often placed in a hallway. So maybe you want to restrict the discharge on the bottom of the A/C unit, and open ducts in the bedroom.I have experience with a new home and A/C where the bozos stuck the thermostat in a dead end of a hallway. No air flow. It must have been an easy place to pull the wires, because it was a stupid place for the stat. I moved it.

Use clear packing tape until you figure out configuration that works. Closing/restricting should help

Getting the AC right | Good Sam Community

Bumpyroad
Explorer
Aug 18, 2020
your main area AC sounds like it is set to a dump position to rapidly cool off the main area, then you should close the vent a bit and duct to the rest of the RV.
bumpy
2oldman
Explorer II
Aug 18, 2020
Where is the thermostat?
campigloo
Explorer
Aug 18, 2020
Use clear packing tape until you figure out configuration that works. Closing/restricting should help
bpounds
Nomad
Aug 18, 2020
No expert here, since we rarely ever use our RV A/C. But I'll throw in anyway.

No harm will be done if you restrict, or even close, any duct registers you choose. Within reason of course, but the vents on the bottom of the A/C itself should be plenty of flow by themselves.

Do you have the round registers, or rectangular. I haven't seen the round ones with flow restrictors, but there might be. The rectangular type usually do have them. But regardless of what type, you can easily restrict the flow. Just block some or all of the slots in the register. Use whatever type of tape that suits your décor preference.

If your goal is more even temperature throughout, the key is usually to push the air to the farthest ducts, and force it to flow back to the return at the main A/C. It's called Forced Air. Ideally the air flow should pass the thermostat location. And that is why they are most often placed in a hallway. So maybe you want to restrict the discharge on the bottom of the A/C unit, and open ducts in the bedroom.

I have experience with a new home and A/C where the bozos stuck the thermostat in a dead end of a hallway. No air flow. It must have been an easy place to pull the wires, because it was a stupid place for the stat. I moved it.
jdc1
Explorer II
Aug 18, 2020
Are you sure those other vents can't be closed off some? The round vents push in and pull out. If they are non-adjustable rectangle metal, just replace them.
shar3890
Explorer
Aug 18, 2020
You can pull the covers off the ceiling ducts and place a lid from a deli container with smaller hole cut in it to decrease air flow in cold areas-then replace the duct cover. This will help balance the AC throughout the trailer. Have done this in all our trailers and it really works.

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Getting the AC right

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