Quote:
Originally Posted by jimbo2012
First check the CFM (cubic feet per minute it pushes) of the unit, I think U need about 1000-1500 to make a difference, in electric they cost about $100 plus install.
This one is 1000 cfm at HD for $270
Nice thing is the panels can be set to suns angle, U do not want a flat top unit.
It should face due south about 180 degrees.
this is what you don't want
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There is a misperception that the solar attic fans with adjustable panels are the best or work better than other. Not so. My Solar Star solar attic fans (by Solatube) have a static panel mounted into the fan body; however, Solatube has several roof flashings to choose from so that the fan can be mounted for optimal operation. By not having flimsy support legs for their solar panel, Solatube eliminated a potential weak point that could fail. Everyone has an opinion on this topic, but I can say from personal experience that my Solar Star fans have made a HUGE difference in my home with direct impacts to reducing my summertime electric consumption and bills to the power company. Also, the 30% federal tax credit savings were quite a nice bit of money.