"Lacustral" wrote in message

Does more ventilation than that cool down the attic and the rest of the
house better? It's not really a lot of ventilation.

Heat rises. Heat is building in the attic space from the su n beating down
on the roof. The heat is the house iwll not go up any more as the space
above it is already very hot. In fact, some may come down.



It seems like intake ventilation is easier to get than exhaust
ventilation. People have suggested ventilation plans to me that give far
more intake than exhaust ventilation. Do you get any extra cooling from
adding intake ventilation over the amount of exhaust ventilation?

For exhaust ventilation, people have suggested ridge vents and louvers.
I might need both to get enough ventilation, the ridge is very short.

I'm not exactly sure what you mean by intake and exhaust ventilation. No
matter how it is done, the net effect of intake and exhaust will be equal.
No matter how much air you try to blow in, you can only blow in what will
move out. No matter how much you try to suck out, you can only draw the
same amount that comes in any inlet spaces. I don't know your house, but
as you already have seen, many variations exist, from ridge and soffit
venting, roof turbines and powered fans.
--
Ed
http://pages.cthome.net/edhome/