Wind Turbine Attic Fans

Attic ventilation systems?

What would be better to cool down my attic? A wind turbine or a powered
fan with a thermostat? And why? My attic gets to be 100-120 degrees when it's like 80 outside? It just has regular roof vents at this time.
I live in a 2 story side by side and it a lot warmer
upstairs then the main level.

There is no magic pill for attic ventilation. Most attics need to have at least 2.5 air exchanges per hour. That is to say that you need to replace the air in your attic with new air from outside of the attic at least 2.5 times every hour in the summertime. However big your attic is will determine what type of ventilation you need. This really is judged by the Cubic Feet per Minute rating or the CFM of whatever type of vent your researching.

I like using the 14" wind turbines that require no power. They will always move air, even if you have low wind outside. A fan will give you great ventilation as long as it is on. Most of these will be on a thermostat which means that when it is not hot, it will not be running. They typically costs about 2 cents an hour to run. Ridge Vents are great for moving air out of every "hot spot" in the attic but not so great for moving lots of air unless you can get a lot of ridge venting on the roof.

Any type of roof ventilation must be added with consideration to intake ventilation as well. Most homes, even new homes, have very poor intake. Usually adding more soffit vents, or fixing the ones you have so they are allowing air into the attic, is a mandatory improvement when adding more exhaust ventilation.

Quiet solar attic fan, SRS, coolmyatticnow.com

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