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Old 11-15-13, 10:49 PM   #15
Exeric
Apprentice EcoRenovator
 
Join Date: Aug 2012
Location: California
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Well, its seems I was looking through rose colored glasses when I estimated that the temp rise in summer of 40-45 degrees would continue into winter. My reasoning was that the lower inclination of the sun was already included in the lower air temperatures in winter so that there would be no reason to double count that in the temperature differential between outside and attic temperatures. So there is a lower temp rise than what is already included in the lower air temperature in winter (technically Fall).

Everyday I've watched the temp rise between outside and attic get lower. I still haven't closed the roof vent because I wanted to see how things change without a lot of variables. Here are some temp rises I've recorded:

Oct 8 - 34 degrees rise, attic high temp 110 degrees
Oct 28 - 31 degrees rise, attic high temp 98.

I was starting to get concerned because on poor solar days it was dropping into a temp rise of the low 20s. I needed to do something before things deteriorated further, which I did. More tomorrow on how I improved things while keeping the roof vent open for comparison purposes.



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Last edited by Exeric; 11-16-13 at 08:12 PM.. Reason: I had wrong high temp for Oct 8
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