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Old 10-13-2013, 06:34 AM   #1
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2013 International 30/one A/C or two?

In a few months, I will be ordering a new Int Serenity 30 Queen Bed and have the option of one A/C units or two.

The advantage of two units is of course better cooling in very warm climates.

However, the disadvantages include: 50 Amp service required with a very heavy power cord. Loss of the front shore power connection which is included with a 30 Amp, one A/C unit. The requirement for a generator of at least 5,000 watts vs, 3,000 watts for the 30 Amp.

The extra cost comes to roughly $2,200 for the option, $300 for power cord, and an extra $2,000 for larger generator. Or, about $4,500 for the option. And, this is not even considering the extra gasoline requirement, a potential hazard when boondocking. Maybe a 20 gallon fuel cell?

As I remember my 2009 Int 27FB had one A/C and in summer venues in the southern USA, ambient temperatures in the 90's, it was going full time during the day

My question is for those with 30 foot units who may have one or two A/C units. Is one adequate and how have those with two dealt with the higher power requirements?

My thanks for all who can offer their experience.
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Old 10-13-2013, 07:16 AM   #2
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Maybe a different question

We just have a 25 and in Eastern NC in the summer the AC runs fulltime during the day. But, there is nothing inherently wrong with an AC unit running fulltime; that is better and more efficient than short cycles. I think the real question should be whether one unit is capable of cooling your AS to the desired temp in the climate of choice.
The only real drawback to our one unit is that we need to run a desk fan on the galley counter to blow the cold air forward to the bedroom. The overhead unit blows all of the cold air aft. I expect that is less of an issue with two units, but my little fan cost far less than the two unit upgrade and 50 amp spots in RV parks. We kindof hate the loud noise from the AC unit anyhow and will look to the shoulder seasons to do our camping...with the windows open.
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Old 10-13-2013, 07:21 AM   #3
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One A/C or Two?

Yes, i think I remember the air distribution issue in the 27FB. And, the noise. Thanks for your feedback.

A note, my 27FB had two panoramic windows, the new 30 Queen has only one panoramic window, far less heat loss/gain.
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Old 10-13-2013, 08:36 AM   #4
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It sounds as though you have already decided what to do. Our coach has the two a/c units and we are glad to have them when conditions warrant.

We are currently on a WBCCI Caravan in the West and the weather has varied greatly. When we were in 100 degree plus conditions we needed both and this morning with the temperature in the 30's we are glad to have the two heat pumps working.

You are correct that the power cords can be a "handful" particularly in cold conditions. We carry two Honda 2000i's and used both only once on this trip in parallel. The extra weight, etc. of course is also a consideration, but many of my fellow caravan travelers who have longer trailers have expressed a wish to have the two units.

Good luck with your purchase.
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Old 10-13-2013, 08:39 AM   #5
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I had two - the main one would run more often then the bedroom, lost the fan which sucked at night in the bedroom. Two A/c's good if you are going to close the partition door and use the two zones of your a/c. It's a tossup, but a summer spent at the beach on my 30 made me glad I had two units, but only during July-August, then I wish I had my two fans vice just one in the galley and the A/C in the bedroom.

Also, you can get a 30 - 50 amp converter and just run the main a/c, both camping and when boon docking - I did this many times and did fine....
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Old 10-13-2013, 08:55 AM   #6
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Quote:
Originally Posted by Msmoto View Post
Yes, i think I remember the air distribution issue in the 27FB. And, the noise. Thanks for your feedback.

A note, my 27FB had two panoramic windows, the new 30 Queen has only one panoramic window, far less heat loss/gain.
Don't think about it for another minute, get two. In NC you will have plenty summer days you need two. If you go south, even more so. The 30 especially needs 2 if you ever plan on camping in temps above 90. We have a 2012 30 and on the first camp in TX the main one blew up, outside temp and in the sun was 105 daytime. Inside temp with one running full blast, 85. Next trip after that AC fixed, the bedroom AC quit, bedroom temp 85 forward area temp 80. With a big fan bought at Walmart, we were able to get the bedroom temp down for sleeping by 10pm. Many camps will only have 30 amp, so you just run one AC and you don't camp there in the full heat of summer. Same with generator, buy a 3000 or 4000 and camp accordingly.
One other plus, if one fails like 2 times with us, you don't have to pack up and go home.
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Old 10-14-2013, 09:22 AM   #7
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I agree that the noise from the smaller, bedroom unit is an issue. We generally won't run it unless necessary.
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Old 10-14-2013, 09:31 AM   #8
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With two A/C units, you can have the choice of running the unit in the opposite end of the trailer from where you are seated and have a chance at conversation at normal voice levels.

We already have the two 2,000 watt Honda generators.

We ordered the Farrion 50 amp 125/250V RV female to 30 amp twist lock male pigtail adapter (P/N FP5230R-SB) that will plug directly into the Honda generator.
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Old 10-15-2013, 08:38 PM   #9
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I think I am becoming convinced.... Two A/C units. The options are much greater this way and when at a campground it will be easier to keep cool. I have camped in Orlando, FL, in August, Texas in late spring or early fall, both times when unseasonal heat may occur. One A/C unit leaves me in a position to be very uncomfortable. Two is clearly the best option.

Thanks so much...
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Old 10-15-2013, 09:01 PM   #10
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Two.

Learning to work around the 30/50 amp cord issue is a damn sight better than being hot.

Any day.

Supplying less than 50 amps into a 50 shoreline just means you have to remember not to turn on something.

Sitting in a 90 degree trailer with no hope of getting cooler just plain sucks.


Regards,

JD
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