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Old 12-06-2006, 06:50 PM   #1
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Swamp coolers for TT, RV?

Bought a used a Lazy Daze several years ago (sold it since) and it had a swamp cooler instead of an A/C. I remember being disappointed when I discovered it wasn't an A/C. But--when I realized it was 12 volts and it actually kept the interior comfortable, I was impressed. Does anyone know if these things are still available for TTs and RVs? Or is there something else out there that will cool with just 12 volts? Thanks
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Old 12-06-2006, 06:51 PM   #2
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I've always wanted to know what a swamp cooler was.....
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Old 12-06-2006, 07:27 PM   #3
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Quote:
Originally Posted by Silvertwinkie
I've always wanted to know what a swamp cooler was.....
A swamp cooler is an evaporative cooling unit. In general terms, it cools the air inside the trailer by evaporating water against cooling fins, or wood shavings, and the air is blown against the cooled fins or shavings to cool the interior. It works very well in dry climates, I had one in my house in Califonia. They don't work so well here in Florida, as the water won't evaporate quickly.
There is no reason a 12 volt motor couldn't be used in one, resulting in a 12 volt air conditioner, or sorts, for an RV.
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Old 12-06-2006, 07:30 PM   #4
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A swamp cooler uses evaporative cooling. The evaportization of the water (usually recirculated onto a fiber media) cools the air by the amount of energy it takes to evaporate the water. It works well in Arizona and other hot dry places. It does not work well when the air is already humid like New Orleans or Florida. They still sell them in Arizona but I do not know whether there are any powered by 12 volt pumps and fans still available. They are usually quite bulky and not suitable for travel on the top of a trailer.
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Old 12-06-2006, 07:42 PM   #5
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The RV swamp coolers cost about as much as an A/C. They use as much battery as a furnace does (50 - 100 watts). And they need about a gallon an hour of water to cool.
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Old 12-06-2006, 07:54 PM   #6
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Thanks for the info....learnt me somethin' today!
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Old 12-06-2006, 07:57 PM   #7
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Living here in NM we've used evap.coolers for years. For "clarification". Evap coolers don't cool the air in the room like refridgerated ac systems do but REPLACE the warm with cooled air. Evap coolers take outside air ,pass it through wet pads where evaporation occurs then pushes it through and out the opposite side of the room. Windows are left open opposite the cooler so it can displace the warm air with cooled air. Where as refridgerated air conditioners are measured in BTU's, evap collers are measured in cubic feet per minute. In a home for example you measure the cubic feet of the area you want to cool and double this number. The idea is to have a cooler that is sized to replace the area to be cooled every 2 minutes. For them to be efficient the humity MUST be very low.
Once it gets much above 25% they are noticably ineffective. The advantage they have is in energy savings. All they need is a fan motor and small water pump, neither pull much in the way of current like a compressor.
We used a small portable in our 30' Airstream this summer at Arches National Park when Camp Hosting. It was in excess of 100 degrees many days. Ours consumed a Gallon Per Hr. at that temp and 6-8 % humity. pieman
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Old 12-07-2006, 07:53 AM   #8
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Kooleraire

I bought this at a thrift shop for $2 (new, in box!). "Just add ice".

http://www.kooleraire.com/kooleraire25.htm

We'll see how it works.
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Old 12-21-2006, 12:49 PM   #9
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Thanks for all the responses.
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Old 12-21-2006, 05:01 PM   #10
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Quote:
Originally Posted by SilverRanger
I bought this at a thrift shop for $2 (new, in box!). "Just add ice".

RV Air Conditioner KoolerAire RV Air Conditioning

We'll see how it works.
OK, I can make one of those with a $5 fan. Still, you got the deal.
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Old 12-21-2006, 07:55 PM   #11
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OK, I can make one of those with a $5 fan. Still, you got the deal.
Yes, the design is quite simple. I couldn't imagine paying $40 for one of these.
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