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Old 04-17-2015, 09:20 AM
 
Location: Sonoran Desert
39,081 posts, read 51,259,863 times
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Our "problem" is radiant heat gain. Convective heat flux is governed by the temperature gradient between the outdoors and indoors which, in the Phoenix area is much less and of shorter duration than it is in the colder parts of the country. Radiant barriers like Tek-foil are much more effective in our climate than more insulation or triple pane windows. The latter work best in areas where there are high temperature gradients and, thus, greater convective heat loss/gain.

Driving around I notice that most of the new homes are being built with foil radiant barriers now. Older ones rarely have this.
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