" wrote:

exhaust fans with ridge vent is the tops for inefficency. the fans
just suck the air from the nearby ridge vent, and that doesnt
really ventilate the attic.........

That could very well happen.

But the same could be said regardless if the fan is wind-powered or
electric-motor powered.

A fan that pulls outside air through the ridge vents and then exhausts
that air right back outside will nonetheless create air currents inside
the attic and it will lower the temperature of the warmest part of the
attic - the area in the peak or top part.

If you have a ridge vent then you probably have an inverted V style
roof, which means you could mount a fan on the side wall of the attic
(or both side walls) and have it blow outside air into the attic,
thereby helping to force the hotter attic air up and out through the
ridge vent.