Night flushing cools the building, so it begins the next day at a lower temperature. Then it takes longer to heat up again. In the morning, close all the windows to keep the heat out as long as possible. Open the windows only when the temperature is higher inside than outside. Natural forces will move air through the house, but a fan provides better cooling.
Night flushing is most effective with a powerful whole-house fan.
Room And Ceiling Fans Fans that circulate air within a room also improve comfort. They blow air over your body and draw heat away. These fans could be mounted permanently to the ceiling or they could be smaller portable models. You can operate a circulation fan while the air conditioner is running. This would allow you to turn up the thermostat to a warmer setting, which reduces the energy used by the air conditioner.