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Xringer · 06-30-12, 02:08 PM

Back in the 1970s, I installed a thermostatically controlled exhaust fan in one end of the attic.
It gets way too hot up there. I used to unplug it during the winter..
But for some reason or another, it was left unplugged for years on end.

The other day, I saw the it was over 120f up there and went up and plugged it back in..
It's been running on every hot day. Once the temp gets over about 115 up there, it's on.
As the afternoon sun angle changes and the temperature starts to drop (around 4PM), it will click off..

I think it's good to get rid of the excess heat, but it's costing me 218 watts while the fan is running..
But, since we are also cooling the living spaces for less money (ceilings not as warm), it's likely break-even..

06-30-12, 02:08 PM	#5
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	excess heat in the attic.. Back in the 1970s, I installed a thermostatically controlled exhaust fan in one end of the attic. It gets way too hot up there. I used to unplug it during the winter.. But for some reason or another, it was left unplugged for years on end. The other day, I saw the it was over 120f up there and went up and plugged it back in.. It's been running on every hot day. Once the temp gets over about 115 up there, it's on. As the afternoon sun angle changes and the temperature starts to drop (around 4PM), it will click off.. I think it's good to get rid of the excess heat, but it's costing me 218 watts while the fan is running.. But, since we are also cooling the living spaces for less money (ceilings not as warm), it's likely break-even.. __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less..