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Old 03-14-2016, 12:49 PM   #1
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2011 27 FB International
San Antonio , Texas
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Adding second unit questions??

Hello!!

We have a 15,000 BTU unit in the living area of our 2011 27FB International Signature. We want to add a second unit to the bedroom, as the single unit is not enough to keep our trailer cool in the summers. We find ourselves camping from time to time in hot areas, and this summer I will be in SE/E Wyoming, (very little shade) fairly arid, all summer long, so I need a second unit.

My question is would a 13,500 BTU unit be sufficient or should I spring for the 15,000 BTU unit?

What are your experiences?

Thanks
KS
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Old 03-14-2016, 12:57 PM   #2
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Quote:
Originally Posted by kstewart23 View Post
Hello!!

We have a 15,000 BTU unit in the living area of our 2011 27FB International Signature. We want to add a second unit to the bedroom, as the single unit is not enough to keep our trailer cool in the summers. We find ourselves camping from time to time in hot areas, and this summer I will be in SE/E Wyoming, (very little shade) fairly arid, all summer long, so I need a second unit.

My question is would a 13,500 BTU unit be sufficient or should I spring for the 15,000 BTU unit?

What are your experiences?

Thanks
KS
Typically second units that are added are around 11K or less. Also be aware that you will have to address power issues since you probably have a 30 amp plug which cannot handle both units running at the same time. There are others here on the forum who are knowledgable regarding addressing the power issue. I'm not sure what part of the country you typically travel in but my 30' Classic is kept pretty comfortable with the single 15K unit. Do you have window awnings that you can deploy?

Jack
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Old 03-14-2016, 01:43 PM   #3
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I just had this done to my 2010 30FC. In fact I just picked it up late last week from the dealer. They had it at their shop for over 2 months. You can PM me if you want the real details. I will tell you right off the bat, it was not cheap though. We added another 15k (with heat pump) and of course upgraded the whole thing to 50A. There was a lot of wiring involved to make all this work. The cost came out higher than I expected and most of it was labor. If you can do the work yourself, then you can save a ton of money. It is a significant upgrade though. We just got tired of struggling to keep cool in the hot summer sun. An added benefit to the 50A though is more amperage for everything to share from (less tripped breakers). As much as this cost us, I am really hoping it does what we are expecting.
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Old 03-14-2016, 01:59 PM   #4
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Well the areas we stay in are very HOT. We live in South Texas and travel a lot through the desert, and the 15,000 BTU AC we currently have is definitely not enough in the summer.

Airstream in Buda has quoted me about 1600 to add a 13,500 BTU ac in the bedroom, it would have a separate plug. I figured I could use a splittler, I could plug the main plug into it as well as the new AC plug, I figured in the winter I would only need the 30amp main and when it's hot I could plug both plugs into the splitter or whatever its called and then into the RV park electrical outlet, figured I'd need to use the 50amp outlet for the two plugs.

Thanks

Also we do have a awning for the door side of the trailer only. I'd prefer not to rely on awnings, as some parks do nothave sufficient space to open them all. And the AS dealer said the only two ac units avail to put into our As is the 13500 and 15000.
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Old 03-14-2016, 02:32 PM   #5
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Adding. # 2. A/C. For extreme areas

Other than the actual installation.....No huge task, ID recommend a separate 30 amp lead to #2 A/C. Most parks I believe have a 50. 20. & 25 amp duplex. Use all 3 if needed. Assuming the existing AS wiring & the new #2 lead are all capable of the anticipated amps needed. Keeps it simple and effective. The 25 amp duplex should support a rooftop A/C. Confirm my thoughts with an experienced electrician. Tha added separate 30 amp circuit should fill your needs.... Safe travels. UOTE=kstewart23;1762265]Well the areas we stay in are very HOT. We live in South Texas and travel a lot through the desert, and the 15,000 BTU AC we currently have is definitely not enough in the summer.

Airstream in Buda has quoted me about 1600 to add a 13,500 BTU ac in the bedroom, it would have a separate plug. I figured I could use a splittler, I could plug the main plug into it as well as the new AC plug, I figured in the winter I would only need the 30amp main and when it's hot I could plug both plugs into the splitter or whatever its called and then into the RV park electrical outlet, figured I'd need to use the 50amp outlet for the two plugs.

Thanks

Also we do have a awning for the door side of the trailer only. I'd prefer not to rely on awnings, as some parks do nothave sufficient space to open them all. And the AS dealer said the only two ac units avail to put into our As is the 13500 and 15000.[/QUOTE]
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Old 03-14-2016, 02:34 PM   #6
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Should read. 50. 30. & 25 amp duplex.
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Old 03-14-2016, 02:52 PM   #7
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Of course if your unit has the SE or classic style windows, you could just remove the screen and fit in a small (7000-10000 BTU) window unit with a plywood surround to fit the window itself. Keep the original packing material, and store it during more moderate weather. $300 - $400 at most. It could run off of the 20 amp circuit.
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Old 03-14-2016, 03:20 PM   #8
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We added a 2nd AC to our 34'

http://www.airforums.com/forums/f205...tml#post839907

Noteable items-
11,000 BTU is almost too big in many cases, it will short cycle.
We used a 2nd breaker panel and 20A inlet dedicated to the rear AC
The Drain hose was the hard part
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Old 03-14-2016, 05:09 PM   #9
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I don't want to do a window unit, some rv parks don't allow them, and I'd like to keep the resale value as high as possible. I don't mind spending the money if they do the job well.

Two people have mentioned an 11,000 BTU to add, but when I called AS they only offer the 15000 and 13500. I just want to be sure it will cool in 90's with partial or direct sun, as we do find ourselves traveling in that kind of weather.
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Old 03-14-2016, 05:37 PM   #10
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Quote:
Originally Posted by HiHoAgRV View Post
We added a 2nd AC to our 34'

http://www.airforums.com/forums/f205...tml#post839907

Noteable items-
11,000 BTU is almost too big in many cases, it will short cycle.
We used a 2nd breaker panel and 20A inlet dedicated to the rear AC
The Drain hose was the hard part
If you lived closer I'd hire you to put mine in..
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Old 03-14-2016, 06:59 PM   #11
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Quote:
Originally Posted by kstewart23 View Post
Well the areas we stay in are very HOT. We live in South Texas and travel a lot through the desert, and the 15,000 BTU AC we currently have is definitely not enough in the summer.

Also we do have a awning for the door side of the trailer only. I'd prefer not to rely on awnings, as some parks do nothave sufficient space to open them all. And the AS dealer said the only two ac units avail to put into our As is the 13500 and 15000.
Awnings aren't always the total answer but the window, rear, and street side awnings are nothing like the patio awning so I can't imagine why those would be a problem in smaller sites. I put a street side Zip Dee on my 27' Safari that covered the entire side. It is actually a much shorter opening length awning that uses a strap that attaches just around the belt line with a special hook. Much like the small window awnings I have on my Classic. I used to have heat issues with the Safari and adding that awning made a big difference in indoor temps.

Base on your locale I can see why you are considering a 15K unit. Keep in mind that too much cooling can be an issue in areas with higher humidities. I know that my 15K unit at night sometimes cools a little too quickly which tends to produce a cool clammy type of interior since it isn't running enough to condense the moisture in the air. Give consideration to the 13.5K unit since it may be a lot more comfortable when outdoor temps are below the 100 degree range.

Jack
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Old 03-14-2016, 08:27 PM   #12
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Definitely 13500 most adequate in bedroom. We have the international onyx 27 equipped that way. Past summer, dead heat of summer in Arizona, New Mexico, Utah and a few of the slightly cooler states this past summer with two grandkids with us. It was definitely most adequate even in temp of 115.
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Old 03-15-2016, 08:25 PM   #13
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An electrician wire my trailer to 50 amp. Then I added another 15000 BTU. I did just like HiHoAgRV. I could hang meat inside. I never have to worry about being hot again.
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Old 03-16-2016, 11:50 AM   #14
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Ok So I am faced with another possibility. I found another RV Service Center that is not an airstream dealer, they said they could install the second AC unit and create a new plug etc. There labor price is much less than the quote I got from airstream, no surprise there. I am thinking about getting the Dometic Penguin II 13500 Btu for the bedroom. It would have manual controls on the AC itself, which I am fine with.

So here is my question: They said they would create a second plug for that AC, which is what I want. However, they said it would be a 30 amp. My main plug is a 30 amp. So now I would have two 30's, which kinda concerns me. I would have a total need for 60 amps. How is that going to work when I go to hookup at an RV park? Do you think that could be problematic?? What are the issues I could face with that scenario? And what do you think about someone else outside an airstream dealer service department installing the second AC, would you do it?
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