CJT wrote:
George E. Cawthon wrote:

CJT wrote:


To answer your question, you need the soffit vents. Vents in just
the upper area is like having a car with brakes only on the rear axle.


Huh?

As long as you establish air currents that remove the hot air, it
doesn't matter how.


Didn't like that comparison? I thought it was pretty good.

You get good circulation only between the lower and the higher vents.
If there are no lower vents, the circulation in the lower part will be
poor to non-existent.

If you bring in cool air at the top, convection will do the rest.
It doesn't have to enter at the bottom.

Why would you want to? That requires power.
Natural convection, heat rising, will not require
any power.

I'm not knocking soffits, but they're not a panacea, and they're not
the only solution.

Of course you are. Don't know what you mean by
panacea but soffitts plus ridge or end gable vents
is the system that is most used. Nope, not the
only solution, just the most practical and
economical.