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Old 07-09-2012, 02:55 PM   #15
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If you travel into the heat from Oregon often, you cannot have too much cooling from the AC in my opinion. Some time back we upgraded the 13.5BTU to the 15BTU and at times I wish it was even larger! Really though, when it's hot we just close off the bath and bedroom and gradually cool down. The cat loves the warm back room anyhow! Happy Trails.
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Old 07-09-2012, 03:45 PM   #16
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Originally Posted by Skater View Post
Ours only has one. We're going to the Outer Banks in August, so I'm curious to see how it will handle it there (that's the hottest/sunniest place we usually go, so if it can handle that we should be good for 99.9% of our trips). This will be our first trip to the Outer Banks with it.

My parents have an older 34' with only one, and they're looking at putting a 15K BTU A/C in theirs. It's not as good as a second A/C, but it's quite a bit easier and should at least help somewhat. We'll probably do the same when it comes time to replace ours.
This week was the FIRST time I found my 15K single A/C insufficient - for my 25 FB Safari. Of course it was 106 F. I wasn't parked in deep shade either, but had full sun from about 10:00 am ON. Seriously wished I had the full awning package. Humidity was brutal too. I was trying to do some inside maintenance/cleaning/etc. Ended up flopping on the bed with my Endless Breeze fan and a spray mister just trying to keep cool. It was SO hot that I tried to take a cold shower, but the water in the hose ran hot for 5 minutes before I got ground water!

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Old 07-09-2012, 05:55 PM   #17
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There have been several occasions where I would have loved to have a second unit in my 25'. Cost aside, it would be a no-brainer for me in a 27'.
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Old 07-09-2012, 06:52 PM   #18
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Well, in for a penny, in for a pound. I think we'll spring for the 2nd unit. Appreciate the replies.......
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Old 07-09-2012, 07:06 PM   #19
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From what I read online the southern portion of the US requires double A/C units, and practically speaking as a matter of humidity control, not just triple digit temps. One cannot go wrong. The future owner can easily change this. It's a win/win.

A bit of shade in AZ goes farther to keep the vehicle cool than along the Gulf Coast, as humidity should be factored closely. Our days here in South Texas may not reach above 95F but the humidity doesn't get lower than 60% either.

My experience is that a 32' Silver Streak (better design / insulation than an A/S) cannot quite cope with local temps with a 15k unit . . but it does surprisingly well in shade past 10 a.m. with a dehumidifier also running (a big un'). When I leave (8-16 hours at a time) I turn the A/C temp fairly high and the DH to "Normal". This keeps the interior humidity at or below 55%. Yet even at .11/kwh my utility bill is still at $100/month, overall (I'm happy to splurge after six straight days into & out of the oilfield).

How to wire it in (separately or main panel change, etc) is the only real question. I've seen several nice "conversions" here (and elsewhere) so take your pick.

.
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Old 07-09-2012, 07:36 PM   #20
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From what I read online the southern portion of the US requires double A/C units, and practically speaking as a matter of humidity control, not just triple digit temps. ...
.
Amen Brother...
We had no real problem cooling off at 103 in Colorado with 20% humidity...BUT here in Mississippi at 90 degrees and +90% humidity it was a double AC, wide open for hours contest to make headway...The driveway looked like we had a water main break from all of the condensate
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Old 07-09-2012, 08:08 PM   #21
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Yeah, I have to "tilt" the trailers very slightly back and to port to have condensate drain as I desire. (When I turn off my assigned 367 Peterbilt after 14-hours, it's as if a cow on a flat rock, etc). Unlike them Yanks we also know all about cleaning condensors, adding 5-2-1 starters, and are conversant with micron readings on vacuum pumps, ha! Speak loudly at the lunch table on that subject (any vehicle A/C) and three other tables around you will step up and offer to let you use their professional quality HVAC pressure gauge set . . right then!

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Old 07-09-2012, 10:39 PM   #22
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I don't see any down side. We had two in our 34, but it really needed it. In a 27FB, it'll be situated right over your head so there will be noise. Other than that... like Klattu said, you'll be two cool!
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Old 07-16-2012, 09:32 PM   #23
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Just had this suggested...

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Originally Posted by sakthorp View Post
DH and I are getting close to placing a order for a 27FB. He mentioned wanting the second air conditioner in the bedroom and I thought I read that there might be a downside to having the second unit.

We'll be contacting the dealership next week but I was wondering if someone might clear it up for me? As I understand it, the airstream will come with 30 amp service but if we add the second air conditioner, the airstream will then be outfitted with 50 amp service?

Other than the cost of adding the second unit, is there any other downside to ordering the trailer with a 2nd air conditioner?
I just added a roadside awning to my 34' AS and asked the tech his thoughts on adding another HVAC unit. I quote: Only if you plan of using it as a separate unit and NOT on the same circuit as the primary A/C -- and size the unit to the area you want cooled. I am putting a smaller unit in the 11' x 9' toy area of my AS that will draw less than 20 amps and will have a dedicated shore plug power inlet. Sometimes we have "toys" with us and some times we have friends along and need that area for sleeping and chilling out in the southwest climate. Judging from the changing weather patterns -- we will be using it all over the USA!
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Old 07-17-2012, 04:56 PM   #24
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Quote:
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... Only if you plan of using it as a separate unit and NOT on the same circuit as the primary A/C -- and size the unit to the area you want cooled. I am putting a smaller unit in the 11' x 9' toy area of my AS that will draw less than 20 amps and will have a dedicated shore plug power inlet. ...!
Very good post. I added an 11,000 BTU as a second air for the bedroom in our 34'...I would have gotten a 9,000 if they made it. The 11,000 in a small area blasts out cold and cycles off pretty quick under normal circumstances...but then again, 103 degrees ain't normal circumstances...it's friggin' HOT outside
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Old 07-17-2012, 07:28 PM   #25
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Second Unit not a bad option. At one time our 31 foot International had a 13,500 and a swamp cooler (second cooler) that drew only 10a, but worked effortlessly until it broke. Parts for it were very hard to find. We replaced the hole with a fantastic fan which is great, but in high humidity, the 13,500 Carrier works but not a nice as another unit would have.
We may upgrade to a 15,500 a/c unit but would like to keep it to where we can use the generator (3500). The challenge is finding a unit that only draws 15a or less. We don't need it yet, but if we do the coast next year like this year the upgrade will be complete.
We did use our awnings all of the time and tried to park under trees to help keep the direct sunlight off the roof. It worked in keeping the Unit cool, but the ac worked as well.

Good luck, I'd do it and I'd upgrade the lines just to have that upgrade available for systems 10-15 years from now as you increase the accessories that you use.

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Old 07-17-2012, 07:56 PM   #26
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One A/C is noisy, two would be noisier. If I knew more when we bought ours, I would have tried to upgrade to a 15,000 BTU unit, but the 13,500 one works pretty well.

But we stay out of really hot places most of the time, have Reflectix on the bedroom windows (we are not exhibitionists, so we keep the blinds and curtains closed anyway) and use it also on the skylight and fans when they are not used. When temps drop enough we use the fans. They came from the factory only set to exhaust, but I rewired the dinette one for intake, so we can move air pretty fast. The awning(s) work to reduce heat, but sometimes the pads are too narrow and we don't spend much time sitting outside the trailer (we are going somewhere—don't want to leave it out in case of high winds—or just relax inside after a long day). Shade trees also help when they are there, though we have to avoid them when we are relying on solar.

50 amp spaces at RV parks usually cost more too. The use of a 30 amp and a 20 amp is clever, but if the park sees that, they may charge you for a 50 amp space. If you stay in the northwest, some RV parks forbid people from using their A/C. If you stay anywhere long term, there is usually an electric meter at the long term sites and you pay for your electrical use separately.

So you may have already ordered a second one, but if not, I'd think of an upgrade of the OEM A/C and use the fans when you don't need it. If you stay in the northwest, you may not need even one in many places.

Gene
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Old 07-18-2012, 03:23 AM   #27
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We live and camp in the southeast with hot summer temperatures and high humidity. We added the street side awning to our 27FB and will. So far with the single 15K ac it has been comfortable. The heat pump has also worked well on cold days.
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Old 07-18-2012, 09:50 AM   #28
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One approach might be to put a smaller AC in the bedroom that is served by a separate power cord that would plug into the 20A outlet on the pedestal. I run my 13,500 AC all the time on a 20a breaker at the storage yard. An 11,000 AC should run safely on the 20A outlet on the pedestal. I had an 11,000 AC on my little Scamp that ran just fine from a 20A outlet.

The smaller AC, right over the bed, running along with the main AC should make for good sleeping and the two ACs should be plenty for any Airstream.
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