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Old 07-18-2012, 06:42 PM   #29
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Quote:
Originally Posted by Pahaska
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.
That's exactly what we have...love it!
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Old 05-31-2016, 10:47 AM   #30
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What is typical cost of adding second AC in bedroom on 25' flying cloud fb
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Old 05-31-2016, 11:20 AM   #31
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We find the single unit in our 2002 Classic 30 marginal when outside temp is above 85 or so, particularly in the daytime. The full awning package helps a lot. We travel with dogs and close the door between the split bath and the living area to keep them confined at night. The slot above the door, presumably to allow air flow to the rear, is too small to get sufficient cooling in the bedroom.

Thinking about a single 11,000 BTU unit in the bedroom. I'll put in the air handler with the separate thermostat and run the existing system as a single zone. Simplest approach is probably to run a separate power cord. The 50A cord is heavier and harder to stow.

Al
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Old 06-05-2016, 11:32 PM   #32
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Quote:
Originally Posted by Al and Missy View Post
We find the single unit in our 2002 Classic 30 marginal when outside temp is above 85 or so, particularly in the daytime. The full awning package helps a lot. We travel with dogs and close the door between the split bath and the living area to keep them confined at night. The slot above the door, presumably to allow air flow to the rear, is too small to get sufficient cooling in the bedroom.

Thinking about a single 11,000 BTU unit in the bedroom. I'll put in the air handler with the separate thermostat and run the existing system as a single zone. Simplest approach is probably to run a separate power cord. The 50A cord is heavier and harder to stow.

Al

That is exactly what we did in our 34' and have been thrilled. We had another camper with a larger AC in the bedroom and it short cycled, never running long enough to pull out the humidity.

The separate small cord works well, we can get a 30a site and plug the rear AC into the 20 A outlet.
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Old 02-16-2017, 09:45 PM   #33
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I believe that it has to do first with what size of Airstream you plan on purchasing. There is a downside to Glamping- multiple AC units, residential fridge, induction stovetop, etc., and it is called campground only camping and no boon docking. With higher electrical needs 50 amp is a must and it just adds one more barrier to freedom; or, at the very least more planning.

One thing that made a huge difference in my AC experience was a replacement of the old style Air distribution box to the new style. The old one had little control of air flow. The newer style (non-ducted) has a five-way air flow. It is amazing what a difference that makes. At night I turn the air flow to directly down and in the day I shut off the central area and direct the air to the ends. It can get warmer at one end depending on the sun, etc but that too can be adjusted to compensate. I just posted in another thread about AC and heat that so many say two AC units are required to keep it cool. I do not find that to be so with my unit but I do not have as many windows and my walls are insulated with upholstery. I have come to believe that those wrapping windows on both ends must plus other windows- vista view, etc. must really radiate heat long with the bare walls.

One of the things that become obvious, especially in FL, is mis-matched AC to space issues. Too much AC is damp and cold air, not enough AC is constant no-cycle runs and high temps. My AS 11K pulls the humidity down to 39-44% and temp varies with the day/time/conditions. At least if you have 2 AC units you could run one after initial cool down.
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Old 02-24-2017, 10:55 PM   #34
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I too have been scratching my head about this.
I'm leaning towards the two units, just because I'd hate to be short. It's a lot easier to turn one off than to add a second.
Here's the downside as I see it:
1. You lose that brilliant generator plug on the front for easy connection to a generator in the truck.
2. The second air is $2100
3. It adds weight.
4. The 50 amp power cord is heavy and awkward.
5. Adaptors are more expensive as is the surge protector.
6. Some campgrounds think you're going to burn the place down if you ask for 50 amp, they only have 30 amp, and you say, "No problem".
(I almost was refused a 30 amp site at a KOA in Kansas because the owner saw I had two A/C's and didn't trust me).
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Old 07-16-2017, 04:39 PM   #35
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I have a 13.5k Penguin in my 27FB currently. While it's okay if in place running with a head start, it takes hours trying to cool down a hot trailer in the heat of the day.

Debating whether to add a second unit. Though I do like the fantastic fan in the bedroom.

Wondering if a single newest generation 15k unit - Dometic NXT - would do the trick? While it's still a 15k unit, it supposedly moves more air and should be more efficient overall. And supposedly quieter to boot. Can't find much info at the moment.
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Old 07-16-2017, 07:26 PM   #36
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To answer the OP's actual question, there are four main downsides.

1) You lose the bedroom fantastic fan.
2) You lose the generator prep port (30 amp outlet) on the front of the trailer
3) It adds to both the overall and tongue weights of the trailer, and
4) It costs more

We just bought a 2018 27FB, and these downsides are what led us to choose 1. It has worked very well so far on our first two trips.
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Old 07-16-2017, 07:37 PM   #37
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Quote:
Originally Posted by BillF95 View Post
To answer the OP's actual question, there are four main downsides.

1) You lose the bedroom fantastic fan.
2) You lose the generator prep port (30 amp outlet) on the front of the trailer
3) It adds to both the overall and tongue weights of the trailer, and
4) It costs more

We just bought a 2018 27FB, and these downsides are what led us to choose 1. It has worked very well so far on our first two trips.
Since the second unit is behind the axles, it will reduce, rather than increase the tongue weight.

Al
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Old 07-16-2017, 07:38 PM   #38
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As I mentioned in another thread... I'm the minority but I'd hate to lose my bedroom fantastic fan. I wouldn't give it up for a 2nd ac. If ya dry camp, that a/c ain't gonna do much for ya. A fan will.
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Old 07-16-2017, 07:53 PM   #39
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Originally Posted by Al and Missy View Post
Since the second unit is behind the axles, it will reduce, rather than increase the tongue weight.

Al
Wow - that's news to me. Here is a picture of our 2018 27FB (the trailer the OP was asking about) with 1 A/C sitting in the driveway. The 1 A/C is a bit behind the axles, but I can't imagine they could fit ANOTHER one back there. From what I've heard, it's mounted where the bedroom (front) fantastic fan is in the picture.

If it's not mounted there, (in front of the axles), where do you think they put it?
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Old 07-16-2017, 08:01 PM   #40
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I was told that the 2nd a/c is mounted exactly where the bedroom fan would be. On my trailer that would put it a few feet back from the tongue.
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Old 07-16-2017, 08:09 PM   #41
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That's an interesting perspective. My second AC would replace one of the vent fans. I was thinking the bedroom one, thus my comment. In my trailer, the doors between the living area and the head block the flow of air from the single AC to the rear bedroom. My plan was to replace the rear vent fan with the second AC, thus my comment.

Here's a picture of my trailer. Unfortunately you can't see the axles, but they are between the refrigerator vent and the bathroom vent which you can see in the picture. The bedroom vent fan is out of the picture to the right.

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On my trailer, I think the second AC would reduce the tongue weight. On yours perhaps minimally, but it probably wouldn't increase the tongue weight.

Al
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Old 07-16-2017, 08:50 PM   #42
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I don't think there is any downside I'm happy to have 2 ACs especially with the ducted system.
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