> Otherwise crack a window or go sit outside to together as a family on covered rear patio and run a large fan. You don't crack a window when it's 105°F outside, much less go out on the patio, unless you want to have a heat stroke. > Modern homes are not constructed with passive ventilation from the outside in mind I do not want passive ventilation when it's 105° and 70% humidity outside. I want to battle the elements with all the power I can muster. > They're all kind of designed to be air conditioned all the time and humidity quickly becomes a mold problem A/C reduces humidity. Mold can't grow if humidity is less than ~50%. You can't run A/C for any length of time and have humidity that high unless your house leaks like a sieve.