In the Ask Norm Section of the mag....Norm says "...according to Mike Lamb, at the Energy Efficiency and Renewable Energy Clearinghouse, the best approach is simply to maximize whatever air circulation your house is capable of, and the only way to do that is to install continuous ridge vents and sofit vents. Even powered fans don't match the effectiveness of this system and turbine vents aren't even close." HA I'M RIGHT!!!!!!!
backstory...had to put a new roof on the old house so I have had an education on roofs....building the new house I wanted, no insisted, we put in ridge vents onto our house and by code the house didn't have to have this....sssoooo I argued and got my way but it is nice to know that NORM is on my side! HA