best approach to take to ventalate attic

[smp7015]

1733 sq foot home. Has three attic roof vents that aren't powered.

What would be the best way to improve attic ventilation?

[bb]

Ridge vents work well. I wouldn't recommend powered vents. There have been studies that claim that they use more power than they save.

Besides, most of the one's I see have burned up motors.

[Edited by bb on 06-22-2005 at 11:43 PM]

[hoozdis]

...the soffett vents are clear and actually cut underneath the grille, Ive lots of them that arent

[cem-bsee]

read prior posts on this subject
read at BUILDINGSCIENCE.com
know that ridge vents not for low pitch & need baffel at front edge!
0.25" hardware cloth keeps out most insects, 0.5 for squirrels
GOOGLE.com the subject