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Old 04-03-2016, 11:47 PM   #1
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Advice on 1 or 2 AC units on 28' Airstream

Can anyone tell me how well their singe AC unit works on a 2015-16 28' Airstream. At what tempitures would a 2nd unit come in handy?
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Old 04-04-2016, 05:29 AM   #2
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We have a 30' FC with two A/Cs. Anything above 85 degrees and especially if in the direct sun on any part of the trailer both A/C units run. We were at Lake Powell last summer and almost the entire trailer was in direct sun at the NP campground. The temp in the shade was 107 F, the A/C units kept the trailer at a nice temperature, but they both ran all day.

We also got two units just in case one broke, as well as to use as heat pumps, they help warm up the trailer petty quickly.

So far no regrets on getting an AS with two units.
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Old 04-04-2016, 05:34 AM   #3
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A lot of variables there. BTU of unit, trailer layout, and are they utilizing factory insulation. I am removing my roof top unit and installing a concealed unit. Less wind drag and will look better.
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Old 04-04-2016, 05:41 AM   #4
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Can anyone tell me how well their singe AC unit works on a 2015-16 28' Airstream. At what tempitures would a 2nd unit come in handy?
The second unit does come in handy. I usually set up the units so one comes on at a temp a couple of degrees warmer than the other. That way, the second one doesn't run unless the first one can't keep up. And of course, the reverse for colder weather, using them as heat pumps. The downside I've noticed is the second unit comes with some heavy baggage, the 50 amp cord. It's stiff and heavy, and handling it is kind of like trying to arm wrestle a snake. One of the aftermarket RV parts places has released an adapter within the last month or so, you can plug it directly into the trailer, and use a 30 amp extension cord when you aren't going to use the 2nd unit.
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Old 04-04-2016, 07:25 AM   #5
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The second unit does come in handy. I usually set up the units so one comes on at a temp a couple of degrees warmer than the other. That way, the second one doesn't run unless the first one can't keep up. And of course, the reverse for colder weather, using them as heat pumps. The downside I've noticed is the second unit comes with some heavy baggage, the 50 amp cord. It's stiff and heavy, and handling it is kind of like trying to arm wrestle a snake. One of the aftermarket RV parts places has released an adapter within the last month or so, you can plug it directly into the trailer, and use a 30 amp extension cord when you aren't going to use the 2nd unit.
I bought the adapter - 12" long and also a 30AMP cord, one of our best purchases. Also bought the same adapter BUT for 110 just in case and it too is terrific as at the storage facility we have our AS there is a 110 plug that is operational and I plug it in to test everything but the A/C units.
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Old 04-04-2016, 08:28 AM   #6
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We had an '04 28' Classic with one A/C unit, and it just didn't cut the mustard any time it was hot outside. I remember several times pulling into a part in the hot afternoon, and it taking till about 11 at night until it was cool enough to sleep.

I would recommend getting the trailer with two units for all the reasons posted above, and if running two units is not needed, you always can run just one.
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Old 04-04-2016, 08:48 AM   #7
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We have the 50 amp two air conditioner factory package in our 2014 Classic. Being based in the Southwest this was a no brainer and even two work hard on a hot sunny day with no shade over the trailer. Putting the awnings out on both sides does help with the heat build up as well as shading the backside of the refrigerator space.
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Old 04-04-2016, 09:13 AM   #8
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Hi from AZ. . . we have a FC28 and I'd say anywhere West of the Mississippi, you're going to need 2. And full change to LED bulbs inside. And as Switz said, spring for the awning package, really helps the refrig.. . . We went to Alaska last Summer & never used A/C, so I guess the caveat is your travel plans. . . be careful out there, Craig
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Old 04-04-2016, 11:22 AM   #9
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Living in Missouri I would say get 2 a/c units.
There is more to it than that.
If a trailer has 2 a/c units, it will have 50 amp service rather than 30 amp service.
You cannot run the a/c and microwave at the same time on a 30 amp trailer. It will trip breakers.
You can, however, run the a/c and microwave at the same time on a 50 amp trailer.
Also, if you and your spouse like different temperatures, you can have one end of the trailer at your preferred temperature and your spouse can have the opposite end of the trailer at his/her desired temperature.
2 a/c units and 2 televisions makes married life easier.
I'm always cold.
My wife is always hot.
More to think about...
An Airstream trailer is a cold place when it gets cold and a hot place when it gets hot.
2 a/c's- No problem with high outdoor temperatures-
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Old 04-04-2016, 11:46 AM   #10
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Buy two. Love the dog.
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Old 04-04-2016, 11:54 AM   #11
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We added a second a/c to our 28. Added a second 30 amp plug on exterior, with a 20 amp breaker and circuit. Many sites have only a 30 and 20 amp service. No problem, I run two cords. Very happy with this, and cool. More diversity also. If one leg of a 50 amp service overloads both legs loose power. Not good if our dogs are in camper.
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Old 04-04-2016, 12:56 PM   #12
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We have a 30' Flying Cloud with the two unit option. I agree with others who have posted, when you need it you need it. We generally are fine around here using just one unit, but if you plan to spend time in the south/southwest during the summer, you'll need the extra cooling.
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Old 04-04-2016, 01:16 PM   #13
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A 50 amp trailer is good for more than running 2 a/c units.
You can run the microwave and a hair dryer at the same time.
Not possible in a 30 amp trailer-


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Old 04-04-2016, 04:09 PM   #14
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We had a 25' AS (A 2006, I believe) and couldn't cool it adequately with the one A.C. We have a 2011 30' now and it has two A.C.s. It stays cool enough for a trip from the southeast to the Rockies. If I lived in Missouri and used the trailer in the summer, I would certainly spring for two A.C.s! The 50 amp cable is a beast, but a necessary one if you want to stay cool. I found a 30 amp cable with a 50 amp trailer plug and I use it when I know I won't be using two units. I leave the beast at home then.
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