I have just started a rather crude comparison of fan aspirated vs non-aspirated. I have a FARS solar shield. Today I will control the fan from my inside weather station/workbench.
At 11:35AM Eastern, I turned the fan on.
At 11:45AM, I turned the fan off the temperature was then 81.7ºF
I will cycle the fan on/off at 15 minute intervals.
At 12:00 I will turn the fan on again. Watch the graph on my weather site for detectable differences with the fan on/off.
http://www.lexingtonwx.comThis is the starting graph @ 11:41AM