I've always said if I were to design a house, I'd put drains in the kitchen and bathroom floors plus a faucet for a hose. Imagine how handy they would be when washing floors! What a snap!!
I actually tried to do that in the laundry room of our Nevada house, and was informed that it was apparently not allowed by cod in residential properties because the water in the trap could evaporate and reek havoc on the interior air quality. (Pun intended.) Our contractor generally came to the conclusion that we were nuttier than a filbert tree. We also built the house with a 15' or so high peaked roof with a sky window just below the peak and big fat colonial helicopters in the bedrooms and living room (ceiling fan.)
Open the doors and windows, set the colonial helicopter in the living room to draw air upward, and open the skylight. Does a great job of creating airflow in hot weather.