Les, did you ever get the windows open?

I rented a small, old place in SoCal many years ago, and the windows had also been painted shut. No A/C. I called the owner and asked if that was by design, and she said she didn't know they were sealed (she had never lived in it), and gave me permission to open them. It was a real job, but it made a difference in the summer. But I don't know FL, whether it would be worth the effort, with your high humidity.

My neighbor there had a higher-class older home, and he said he would open the low windows on the shady side (they were almost on the ground!) and also the upper-floor ones on the sunny side, and that really helped. His house was a lot cooler than mine, and there was always a breeze flowing through it.

I guess when you could afford to build a nice house in the 'olden days' (aka pre-A/C) you could design for thermal convection.

Sue