nancyebm
Abilene, Texas
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Joined: 04/18/2007
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"Truth is in Texas, one A/c will only work up to about a 28' RV. Beyond that you need two. It is really stupid on the part of dealer and manufacturers to think that anyone would want to be hot in the Texas summers in an RV."
TXiceman:
I couldn't have said it better myself. We have a 34' Legends with three slides. The 13.5K bedroom AC justs makes it that much more comfortable. What a difference it makes in Texas.
Earnest
2005 Chevrolet 2500HD Duramax w/Allison
2007 Legends 30CK3-SH5
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garydean
Fresno Ca.
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Joined: 09/22/2005
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Our rig has two units the main one in the living area at 15K and the bedroom 13K and when it gets hot I'll run the bedroom all day since it's direct flow while the living room is ducked. That way the big unit will not have to cool the whole rig.
Gary & Barbara
2006 Carriage 36XTRM5
F350 2008 Ford Crew Cab Larit 2WD
Two Cats
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JEBar
Willow Springs, NC
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Joined: 10/27/2002
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we have 2 15K units on our 5er .... both are connected to the camper's duct work so either can be used to cool the entire camper .... we can only run one at a time when running our Onan 5,500 generator .... when plugged into 30 amp we can run both but very little else .... if the wiring is in place adding a second roof unit isn't very difficult
Jim
'07 Freightliner Sportchassis
'06 SunnyBrook 34BWKS
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SolidAxleDurango
OK, USA
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Joined: 01/02/2003
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JEBar wrote:.... we can only run one at a time when running our Onan 5,500 generator .... when plugged into 30 amp we can run both but very little else ....
I don't understand this. How come while running on your generator (45-ish amps), you cannot run both? But when plugged in to a 30 amp pedestal you can?
That doesn't make any sense to me.
TV = 07 Dodge Ram 3500 Dually 6.7 / QC-LB / CTD / G56 / 3.73 / 4wd / EBrake
5er = 08 Weekend Warrior LE3505
Toys = 05 Kawasaki Prairie 360 4x4 ( x2  )
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SolidAxleDurango
OK, USA
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Joined: 01/02/2003
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Oh BTW... our TH is 37 feet. No slides, but ceiling height is VERY high - nearly full heigh all the way back - so our air volume is probably on par with those units who have 2-3 slides...
In any case, when the temps near 100, our 15k ducted a/c will keep it at about 78 degrees inside, but that's running constantly.
When temps are 90-95 ish, it stays comfy. But in the places we visit most (TX / OK), the 95+ days are NOT the exception, rather the rule.
We added a 2nd a/c unit to the bedroom - 13.5. 5er was pre-wired, so it was basically plug and play.
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firedude
somewhere HOT!
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Joined: 01/21/2003
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portablevcb wrote:I second the portable home unit. The one Firedude uses is one we actually use in our house. Great unit. Would work well on those trailers with open floorplans. We also have the 'normal' window units in the bedrooms.
For the RV, look at your windows first and measure the openings. Then find a unit that will fit. They come in a lot of shapes.
I am sure you know this already, but, having an awning on the South side can help the heat load.
charlie
So far my portable Amcor 9,000 BTU has been great! Install of the window hose exhaust was a breeze. I've actually only used it so far as the temps have only hit around 90 and have not even had to turn on the roof unit yet. Now this weekend we're supposed to hit the low 100's and along with a few other "cool" mods I've made for the heat I'm very confident I'll be very comfortable. The one thing i like is that if you are paying for the electricity like I am at myu current location the portable unit only draws 7.9 amps and 803 watts! that's about 1/2 of the average roof mount! I'd be glad to post my other mods for the heat for long term stays if anyone is interested, be safe AND cool.
Tony
RV.net Blogs, a world of info!
firedude's blog
Retired Fire Captain Full-timer Rv'er
RV.net Moderator
02 Chevy Silverdo 2500 HD 8.1 gas hog
Allison 5 spd Tans
Firestone Rid Rite Airbags
03 Keystone Challenger 5'er with many mods
TrailAir air ride hitch
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Cox89XJ
Tennessee
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Joined: 07/27/2006
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To the original poster. You probably have 50 amp service. In that case all you need to do is install the second A/C and add another breaker to feed it.
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desert.girlie
AZ
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Joined: 09/12/2006
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Our second a/c was negotiated when we purchased the unit. We generally camp in places with 50 amps and have not tried to run more than one when plugged in here at home. Living in PHX we absolutely need that second a/c. Even when we were camping last month I found myself turning the bdrm unit on while lying in bed in the afternoon reading a magazine.
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firedude
somewhere HOT!
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Joined: 01/21/2003
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OK I finished my project and the article on it with facts and figures. My objective was energy efficient cooling without the cost of adding a 2nd roof top A/c unit. My project was very successful and saved me nearly $700 and I gained some valuable info in the process. Below is the link to my project......
Cost effective and efficient cooling with 1 roof top A/C unit!
Super money saver and very efficient!
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zestytx
texas
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Joined: 06/09/2006
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Thank you ALL for all the wonderful replies and technical info. Our RV is 34 ft with three slide and high roofline.. so lot of cubic feet to cool.. and this unit is not already wired for the second unit and it's not 50 amp service either. So.. I think we'll start with the portable unit and see if that helps. Thanks again everyone!
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