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Not sure of AZ temps but in NO CA i have fan set up to thermostat- surprising how much air it moves. garage is over insulated and I think I get more benefit from great insulation vs. fan related to keeping it cool. When temps drop in the evening- sucks all the accumulated hot air out very quickly.
I have mine on a switch so I can turn off if I chose. the thermostat is adjustable. I think I have mine set @ 105 before it kicks on but can go as low as 75.
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