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Old 04-27-2013, 08:51 PM   #1
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No wonder ASes are hard to heat and cool!

So...for what it's worth department...

I am performing the not-at-all thrilling job of shopping for new windows for the whole house. Trying to do my due diligence on learning about something I know nothing about, I stumbled upon this thermal transmission chart. May be old hat to some, but I was very surprised at the extraordinary conductivity of aluminum.

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Old 04-28-2013, 02:41 AM   #2
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Thank goodness for the wood cabinets in these things.
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Old 04-28-2013, 04:09 AM   #3
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That's why a lot of cookware is made from aluminum, or is aluminum-clad on the bottom. Just be glad Airstreams aren't made of copper, silver or gold; although, it seems like they must be when sheet metal repairs are needed.
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Old 04-28-2013, 06:26 AM   #4
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Yup... good old thermal dynamics. There are ways to reduce the conductivity, but the basics are still there.

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Old 04-28-2013, 06:51 AM   #5
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They should build them out of wood and vinyl. Like them newfangled SOBs.
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Old 04-28-2013, 10:56 AM   #6
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Why coating the roof makes such a difference. Crusty reports that running a mister on the roof in hottest weather drops interior temps 10-15F, IIRC.

You summer-only northerners (the temp equivalent to our early spring) haven't lived until you're sitting on the floor where the temps are closer to 80F than 90F when seated or [worse] standing inside on a 105F Texas day even with 15K BTU hard at work . . or, why the default summerization package is 50A service and two A/C units. And shade.

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Old 04-28-2013, 11:47 AM   #7
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Coat the roof white. Cover windows with reflective material.

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