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Old 04-18-2019, 10:54 AM   #15
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Castiniron's Avatar
2017 25' Flying Cloud
1964 22' Safari
Houston , Texas
Join Date: Oct 2010
Posts: 9
We also have the 2 ac's on our 25' 2017 FC - would not give them up for anything. 2 reasons- 1) We are prone to travel in the south. 2) with the 2 ac's you can sit in living area in the evening with the bedroom unit running and because of the ducting receive the air flow BUT less noisy and at night when sleeping you can have the living area unit running and receive the air in the bedroom and less noise. During the day when it's warm run both. On a larger model to me it's a no-brainer.

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Old 04-18-2019, 12:09 PM   #16
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2007 22' International CCD
Corona , California
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Ive converted to a SmartPlug system. Believe me, at the prices they charge, Im darn careful to bring it with me.
It would not be useful to anyone without a SmartPlug system.
My extension cord is standard, but I rarely use it.
If I get real paranoid I have a lock and chain along that will deter casual theft.

Rich, KE4GNK/AE, Overkill Engineering Dept.
'The Silver HamShack' ('07 International 22FB CCD 75th Anniversary)
Multiple Yaesu Ham Radios inside and many antennae sprouting from roof, ProPride hitch, Prodigy P2 controller.
2012 shortbed CrewMax 4x4 Toyota Tacoma TV with more antennae on it.
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Old 04-18-2019, 01:19 PM   #17
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2016 30' International
Currently Looking...
Quartz Hill , California
Join Date: Dec 2013
Posts: 217
One air conditioner on my 25 foot would not cool it enough in Las Vegas. My 30 foot has two and keeps up with the hot weather nicely. The 50 amp cord is heavy. It's also a little stiff in winter. I solved that problem by buying a 30 amp cord that has a 50 amp head where it connects to the Airstream. I bought it on Amazon. It is a Marinco Park Power.
Bottom line: You need two air conditioners. You won't be sorry.
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Old 04-18-2019, 01:19 PM   #18
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2018 28' International
Fayetteville , Georgia
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Get the 50 amp/dual A/C. You will regret it if you dont.
2018 International Serenity
Cute wife...
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Old 04-18-2019, 01:51 PM   #19
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2018 25' Flying Cloud
Jonesville , Louisiana
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Posts: 35
Get 50amp & 2 A/C. Better to have to much than not enough.
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Old 04-18-2019, 05:09 PM   #20
Currently Looking FC27FB
Erie , Pennsylvania
Join Date: Apr 2019
Posts: 8
Well you sold me on 2 A/C's but.....

a 3k-4k inverter genset should handle one A/C unit with judicial microwave use? only other 120v item is the battery charger right ? all other stuff is 12v or propane correct?


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Old 04-24-2019, 10:05 AM   #21
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2015 27' Flying Cloud
Portland , Oregon
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I have two A/C's and won't go back to a single. I have a few experiences to share.

1. Either make or buy a shorter 50 amp cord. I made a 12' cord and it works to connect to the post about 90% of the time.

2. I've done some testing with others using a propane powered Honda 2200 and a Honda 2000. One A/C will work if you install the Easy Start capacitor in one or both A/C's. However, using one A/C will be near the limits of the Honda and experiments have shown you may have to put the AS in the "store mode" so energy isn't sent to the batteries. In two cases we also switched the refer to propane. Forget using a hair dryer or even a toaster when the A/C is running. Three more factors using a generator are outside temperature, altitude, and propane powered generator. All three affect the performance.

3. The Zone 1/Zone 2 Dometic thermostat functions can be confusing, so make sure you understand it fully. There are some threads here that will help.

Bottom line, if you camp in very hot weather, you will never regret having two A/C's. I have yet to read here anyone who wished they only had one.
The ability to follow instructions is highly underrated.
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Old 04-24-2019, 10:10 AM   #22
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2017 26' Flying Cloud
Tampa , Florida
Join Date: Feb 2017
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On my 26, two A/C's was a must have.
I'm in Florida, but even Colorado gets in the 90's during the day!
My theory was that I didn't need to run both, but it would be there when needed.
Adding the second unit is expensive, but you also get 50 amp service.
The only downside I see is you sacrifice the second Fantastic Fan.

Then buy a second power cord for when you don't want to lug out the giant 50 amp cord.
50 amp female and 30 amp male!
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Old 04-24-2019, 11:00 AM   #23
Currently Looking FC27FB
Erie , Pennsylvania
Join Date: Apr 2019
Posts: 8
Then buy a second power cord for when you don't want to lug out the giant 50 amp cord.
50 amp female and 30 amp male!

Can you give me a link or mfg info? I've seen the dog bone adapters 50 to 30 but not a cord like you have pictured. Good Idea.
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Old 04-24-2019, 11:14 AM   #24
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Broken Arrow , Oklahoma
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I would go for 2 when you need the second unit you will be glad you have it.

My other half does not like a hot camper when she is uncomfortable everyone is uncomfortable.
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Old 04-24-2019, 12:07 PM   #25
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2017 30' Classic
Carlisle , Pennsylvania
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Our first experience with "why do you need two" was in New Jersey. (not exactly the Deep South ). It was over 100 degrees in the parking lot and humidity was up in the 90% range. With one running out in the sun, the inside of the trailer was *very* uncomfortable.
Indeed this was our first few hours in the trailer when we picked it up ....

Since then, we have been careful about shade if it's a 30A site and "must be 50A" if there is any doubt.

Keep in mind that the 30A setup is 30A at 120V. The 50A connection is 50A at 240V. Comparing same to same you are looking at 30A vs 100A. There's a *lot* more power in the 50A hookup.

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Old 04-24-2019, 12:46 PM   #26
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2019 25' International
Anywhere , Tennessee
Join Date: Nov 2018
Posts: 13
Originally Posted by cptdzl View Post
So with 2 running is it twice as loud? I also choose to chase 70 weather I deduce that 2 units is more popular and would have more value on trade-in/sale when moving up?

MY current 50 amp coach has an energy management (load shedding)system for when its running on 30 amps, how does AS handle this? Is it up to Me the operator not to overload the circuit?

Thanks for your input
No, if the AC units are identical, should only increase sound level by 3 dBa. On the same vein, in my opinion, yes, they are loud, but you get used to it. Ive been awakened many times when the heater units cut on. Finally, I would not get an AS without two units, in the size I have (25), makes a difference.
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Old 04-24-2019, 04:05 PM   #27
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2010 27' FB Classic
Austin , Texas
Join Date: Aug 2013
Posts: 164
I just added the second unit to my 27FB. I added a second 30 amp service rather than converting to 50. This way I can run either unit and still use my existing generator and the Front shore power plug. On the days when I need both air conditioners at the same time, I run two cords. 30 amp cords are lighter and cheaper and I carry two of them anyway with one of them living in the back of the truck with the generator.
2010 27FB Classic
1989 190 Class B (Sold)
1977 29 Ambassador Land Yacht (Sold)
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Old 04-25-2019, 08:17 AM   #28
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2017 30' Classic
Carlisle , Pennsylvania
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Speaking of noise:

One trick when you have two is to only run the one for the area you are *not* in. Then run a small fan to keep the air moving. Even without tricks with the A/C, a small fan is a good idea. Less noise and it lets you run the A/C at a higher setting (since it cools you a bit).


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