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A comment on Improving air conditioner efficiency could reduce worldwide temps. Parent comment

Re:Improving air conditioner efficiency could reduce worldwi... by WalterBright on Thursday July 13, 2017 @05:16PM (#14765322)
Simply using a white coating on the roof can reduce the A/C bill by about 3%.

It's so simple, I do not know why this isn't part of the building code in hot places. People may not like it for their homes, but for commercial buildings with flat roofs, it's a no-brainer.

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Re:Improving air conditioner efficiency could reduce worldwi... by dpark on Thursday July 13, 2017 @06:30PM (#14765888)
Don't most commercial buildings use white roofs? I've not spent a lot of time on commercial roofs, but the ones I've been on were always white.
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Re:Improving air conditioner efficiency could reduce worldwi... by pilom on Thursday July 13, 2017 @06:41PM (#14765940)
In colder climates where heating is as much an expense as cooling, no. Most just put black tar up there because it is cheap. That said, when you need to pay to heat in summer and pay to cool in winter, the 3% savings in cooling doesn't help you when you also increase your heating bill in the winter by 3%.
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Re:Improving air conditioner efficiency could reduce worldwi... by sjg007 on Thursday July 13, 2017 @06:44PM (#14765955)
It is in Arizona. White or silver.
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Re:Improving air conditioner efficiency could reduce worldwi... by WalterBright on Thursday July 13, 2017 @07:18PM (#14766121)
https://www.google.com/maps/place/Phoenix,+AZ/@33.4437866,-1...

Looks like good progress. Less penetration into the residential areas, but progress.

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