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Air condition size

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Air condition size
Mon Sep 14, 2009 1:05 am


I am trying to get an idea of just how much ac I will be needing. Lets assume direct sunlight to be safe. I intend to repaint my roof white and leave the sides the blue that they are.

Image

I am looking at 2'' foam in ceiling and 1'' in the walls (or at least close in r value to that in walls). Air ducted from the basement. Curtains in front windows when parked and one of the outside window covers that blocks uv.

I want to put enough in to do it right but don't want to go crazy.

For now it is me and 3 dogs (about 200lbs total for the dogs) but I would obviously like to have enough for a few more people in there as well.
thanks
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Re: Air condition size
Mon Sep 14, 2009 4:44 am


I'll tell you what we have in ours. I know you said you are putting your A/C in the basement, but maybe you can use our example.

I did not use the blow it type insulation, could not afford it at the time. I installed 1 1/2 rigid roof foam in the wall with 3/4" foil two sides foam board over it.

We have three older roof units, when it got to 106 here a few weeks back, we had to have them on low fan, thermostats all the way to the coldest setting. We were able to keep it very comfortable at 72. That was only necessary for 2 hours in the hot afternoon sun. With the patio awning deployed we only needed two on. We also covered our windows with bubble insulation, foil two sides. Example of front window covering below.

Image

Over all I think we did pretty good considering it gets darn hot here.

BTW, I fixed the code on your picture, hope I got the correct one.
Becky & Paul Lawry
Dreamscape
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Re: Air condition size
Mon Sep 14, 2009 6:34 am


Thanks Paul, you wouldn't happen to have any clue what size those units are? The problem I have is that it looks like a lot of 3 unit setups but I figure that can be between 33,000 btu (11,000 x 3) and 45,000 btu (15,000 x 3) depending on combination of sizes. I am basing that on the fact that most roof units I have seen are 11,000, 13,500, or 15,000.
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Re: Air condition size
Mon Sep 14, 2009 10:34 am


No, I have no idea on the model. I'll have to take off the inside cover to find out, that's not going to happen anytime soon I'm afraid. There are two Dometic Duotherm Brisk Airs, one Coleman, they all have heat strips. I just don't have the time right now to remove the covers. All I know is they work very well for older units.
Becky & Paul Lawry
Dreamscape
1968 Eagle 01 #7443
Silver 8V92 HT 740

Dreamscape Eagle Travel Blog: https://dreamscapetravels.wordpress.com/

Dreamscape Build Blog: https://dreamscapesilvereagle.wordpress.com/
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Re: Air condition size
Mon Sep 14, 2009 10:41 am


well I tell you some people....wont even go ouside climb on their roof and take apart their functioning equipment for me :) :) :)
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Re: Air condition size
Tue Sep 15, 2009 11:07 am


Like Paul we also used the rigid roffing insulation and it works great. We have 2 Cole basement units for a total of 4 compressors and we have no problem keeping the bus cool in 100 degree heat. The problem is driving down the Interstate at 70 MPH on a 100 degree day! I can only run 3 compressors because of the size of my generator and it will keep it in the low 80s. Have to make sure all the places in the back for engine heat to get in are closed up as well.
Tom Hamrick
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Tom Hamrick
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Re: Air condition size
Tue Sep 15, 2009 7:54 pm


I even looked up Dometic Duo Therm on their website, didn't even see a link that gave btu, what's up with that!!!! :roll:

I'll see if I can find some information this weekend when I pull the inside cover off for inspection.

All I know is I hope they last a long time, because they do work good, if you like roof warts that is. ;)
Becky & Paul Lawry
Dreamscape
1968 Eagle 01 #7443
Silver 8V92 HT 740

Dreamscape Eagle Travel Blog: https://dreamscapetravels.wordpress.com/

Dreamscape Build Blog: https://dreamscapesilvereagle.wordpress.com/
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