Whole house fan that draws air in through windows and exhausts through the attic work well also
Yes, our attic fan is, I guess, a whole house fan, in that it is 36 inches in diameter.
A couple of times last year, the temps in the house climbed up, and the temps outside dropped. I turned the attic fan on, and lowered the trap door stairs to the attic. I then opened some windows, and it cooled the house remarkably quickly.
A few of us have seasonal allergies. Sucking in that pollen laden air is not in our best interests. I guess we'll just run the central AC as needed.