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Old 01-09-2010, 10:51 PM   #15
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I didn't take much of a chance due to the threat of cold weather. I went down to the storage lot and blew out the line, drained the tank and poured a little pink juice down the tanks and into the drain lines. After seeing temps near the single digits, I'm happy I did. I did reset the thermometer inside before leaving so it could capture the interior lows.
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Old 01-10-2010, 07:54 AM   #16
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Quote:
Originally Posted by Astroboy View Post

How does uninsulated and unheated garage stay above freezing when it's cold outside at 19 degrees?

Do you think this is mostly the residual heat from the warmer days before, or the solar heat that it soaks in during the day (has it been very sunny)?
I think it has to do with the fairly constant temperature of the earth (soil). The underlying soil doesn't drop to the level of the air temperature. So, you are using that heat to keep your enclosed garage at a temperature higher than the outside temp. If you have a concrete floor, it is also radiating out the heat it has absorbed from the earth.
(Same premise as using geothermal--just takes advantage of the relatively stable 55 degree or so temperature of the earth a few feet below the surface.)
Obviously, the better insulated and air tight the structure is, the better is is able to retain the heat given off by the soil below it.
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Old 01-10-2010, 08:11 AM   #17
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The garage is most likely getting some of that heat from the ground.
Since you don't get much air exchange with the outdoors it stays warmer.
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Old 01-10-2010, 10:51 AM   #18
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Last night the temp dropped to around 29 degrees. I checked the temp in the garage at 7am and it was 37 degrees. I thnk we will have one more cold night and then things start to warm up. It has been sunny for the past 2 days with temps getting up to around 50 degrees. The interesting thing about all of this is that it would appear with a light freeze for a few hours which is what we normally have here in Houston the Airstream stored in a garage type storage should stay above freezing. That's good to know.

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Old 02-05-2010, 01:27 PM   #19
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final results

I brought the A/S home today from storage and I can now report on the low temp reading on the thermometer in the A/S. Although the outside temp did fall to the mid to upper 20 degrees at nioght during the several day cold spell the lowest temp reading on the thermometer in inside the garage type storage for the A/S registered right at 32 degrees. So the garage storage did kep the temp warmer that what was outside. Interesting.

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