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Old 12-23-2015, 08:25 AM   #1
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Cool The One Mistake......

When we placed the order for our new AS last April we tried to cover all the bases regarding how we would use the trailer to the options needed. Being a seasoned RVer I was confident that the 30 AMP service with the 15K air conditioned was plenty for a 25 ft trailer. What got by me was how the aluminum conducts heat & cold. For most part of the US that set up works perfectly, but living in Florida it does the job but two would be much better.
I'm posting this thread as food for thought when purchasing your next AS, take into consideration how aluminum handles heat, factor in where you live and what is your comfort level.
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Old 12-23-2015, 08:39 AM   #2
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I live in NC and find that 1 AC is adequate in hot months if the trailer is cool to begin with, that is if it was cool at night or if the AC was running all night. But, when we travel during the day during hot weather and pull in to the campground at 3PM, the trailer is not comfortable at bed time.
It seems life is full of trade-offs. I wouldn't mind 2 AC units but I would mind wrestling with a 50 AMP shorepower cord. If I had a 50 amp trailer, I would use a 30 amp cord most of the time. But, not an issue for me as we will never buy another trailer. If it is too hot to sit outside and enjoy the campground, it is too hot to be camping.
Larry
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Old 12-23-2015, 08:57 AM   #3
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We have a 2008 Classic 25fb. The interior ceiling is lined with a padded vinyl and the walls, mouse fur. We also have the full awning package. The AC is a Dometic 13.5k. We have camped in Texas near Dallas in full sun when it was 104F in July. The AC kept the trailer cool enough for us. The rear of the trailer doesn't keep as cool as the front bedroom but its not uncomfortable. I remember the rear would climb to about 85F using a thermometer on the kitchen counter. Skylights and upper port holes were kept covered with the shades. Of course we just wore shorts, T shirts and sandals.

Since we can't afford a new ducted air model we will live with this and when time comes to replace the AC will probably get the 15k model. We also are planning to upgrade the skylights with Maxims which are better insulated.

Having said all this if you are the type of person who requires low 70s upper 60s in hot weather to keep comfortable then you will have a problem with an Airstream keeping cool enough.

Kelvin
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Old 12-23-2015, 09:17 AM   #4
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So far, the single 15k ducted air conditioner on our 25' FC does a good job of cooling the AS to 74-75, which is our preferred comfort level. We also have the extra awning package.
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Old 12-23-2015, 10:05 AM   #5
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Sometimes I wonder how our ancestors dealt with the hot weather before the 60s. Sweat rolling off you as you try to sleep. The sheets sticking to you as you get up, Trying to dry off after a shower realizing it's sweat...aaahhh those were the days. In Florida you need three air conditioners on a bambi for summer,... but I wouldn't trade your winters for anything in the world.
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Old 12-23-2015, 10:28 AM   #6
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We have a 30fb that only has one A/C. We love to camp at the beach in the summer and have found that one A/C is not sufficient for us. We have survived by using a box fan to push cool air towards the bedroom at night. We finally decided to add a 2nd A/C in the bedroom this winter (our off season). I think it will be worth lugging around the 50A cord for us.
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Old 12-23-2015, 10:43 AM   #7
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I am happy with a single AC unit on both my 25' and 34'. The 15,000 btu unit on my 34 did well at 105, though I will admitted I was parked in the shade.
If it gets to the point a single AC unit does not keep the trailer comfortable, the answer for me is to go somewhere the outdoor temperature is cooler.
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Old 12-23-2015, 11:10 AM   #8
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Originally Posted by lsbrodsky View Post
I live in NC and find that 1 AC is adequate in hot months if the trailer is cool to begin with, that is if it was cool at night or if the AC was running all night. But, when we travel during the day during hot weather and pull in to the campground at 3PM, the trailer is not comfortable at bed time.
It seems life is full of trade-offs. I wouldn't mind 2 AC units but I would mind wrestling with a 50 AMP shorepower cord. If I had a 50 amp trailer, I would use a 30 amp cord most of the time. But, not an issue for me as we will never buy another trailer. If it is too hot to sit outside and enjoy the campground, it is too hot to be camping.
Larry
Larry.

Simple fix.

Before traveling, open the rear end only of the front and rear ceiling vent covers. Make sure that the front of the vent cover, stays closed.

That creates, if you wish, a small vacuum in the trailer, which helps keeping it cool when taveling.

Then, when you stop for the night, immediately plug the trailer into city power and run the AC.

You will be surprised how fast the trailer will cool down. But, the longer you wait, the longer it will take to achieve that goal.

When done properly, it falls in the category of "WOW".

Andy
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Old 12-23-2015, 12:10 PM   #9
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Cooling down - I've nearly fainted a time or two when I've stopped and trotted back to the trailer to take a comfort stop. That thing can turn into an oven traveling down the road, but my solution is simple - take one step inside and pop the fantastic fan lid open. Running both fans for 10 minutes can take 20 degrees off the temp.
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Old 12-23-2015, 12:13 PM   #10
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I think there is a trade off however in creating negative pressure by cracking open that rear vent. The trailer isn't airtight and every area that isn't sealed from the outside will pass air through to make up the negative pressure. That air which leaks in can be coming from anywhere and dependent upon the conditions you are traveling in, you can be pulling in exhaust gas from the tow vehicle and also dust and debris in the air which will collect inside the trailer.

In very hot weather upon arriving at my destination, I'll open both vents with the Fantastic Fans running at high speed in the exhaust mode. I'll also keep the door of the trailer open. After about 15 minutes of running, I'll then turn on the air and close the vents or doors. You knock about 10-20 degrees off that inside temperature, your AC unit will get down to cooling a lot faster. Keep in mind that most air conditioners can only cool the air about 20 degrees below the air being drawn into the intake.

Jack
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Old 12-23-2015, 12:25 PM   #11
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We've found that a single unit is okay for us but one must use a fan to push the air around. When we are camping, 80 degrees is fine inside, with a couple of degrees higher tolerable.
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Old 12-23-2015, 01:12 PM   #12
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Andy,

I have tried that and it is my normal practice. In fact I put a cover over the rear Fantastic so I can leave it open on the road and in storage. I also use a big 12v Fantastic inside to push the cooler air fwd to the bedroom. Those things have been a big improvement, but when it is 95 degrees outside at 4 PM, it does not get to 72-74 in the bedroom by 9PM.
Sure, when I was a scout I camped in a tent in weather ranging from below freezing to upper 90's. But, I am just an old fart who appreciates creature comforts. I have read from some wise experienced streamers that they live by a 40-90 rule, which makes a lot of sense. Maybe even 40-85 for us.
The first year we just stored it during the summer, last year we camped, and with that experience we will store it again this summer.
Larry
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Old 12-23-2015, 02:18 PM   #13
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We now understand why nearly everyone from Texas can be found in Colorado during the summer. Get up around 7000' and you don't have these issues to be overcome. Most of our summertime travels seem to bring us to higher altitudes. I don't mind the warm days and it's great to have the cool evenings. Sometimes even cold.

See ya on the road sometime. At higher elevations during the summer
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Old 12-23-2015, 02:24 PM   #14
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Quote:
Originally Posted by lsbrodsky View Post
Andy,

I have tried that and it is my normal practice. In fact I put a cover over the rear Fantastic so I can leave it open on the road and in storage. I also use a big 12v Fantastic inside to push the cooler air fwd to the bedroom. Those things have been a big improvement, but when it is 95 degrees outside at 4 PM, it does not get to 72-74 in the bedroom by 9PM.
Sure, when I was a scout I camped in a tent in weather ranging from below freezing to upper 90's. But, I am just an old fart who appreciates creature comforts. I have read from some wise experienced streamers that they live by a 40-90 rule, which makes a lot of sense. Maybe even 40-85 for us.
The first year we just stored it during the summer, last year we camped, and with that experience we will store it again this summer.
Larry
Hi Larry.

Back then, I towed a loaded 31 foot all over the US.

Leaving the front and rear solardome vent covers opened in the back side, was a great help. Back then, like in the early 70's, Fantastic fans did not exist. But also today, many owners do not have the advantage of having Fantastic fans, so in trying to be helpful for the owners that do not, of how to minimize the high temperature in the trailer when on the road.

Sharing, if you wish, tricks of the trade, and what works for that person, is what this Forums is all about. I indeed enjoy sharing my personal experiences as well as a "servicing dealer" experiences. Sharing things sometimes, brings much happiness to some owners, and many times even the most simple of things..

In your case, the powder worked for you, but again, I have no experience with using it.

Andy
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