Kitchen appliances generate much heat. Placing the whole house fan near the kitchen can be a good idea. When nights are a lot cooler than days, you can ventilate at night to clear the heat out of the building. This works best when your home is made of dense materials, such as plaster, concrete, brick or stone. These materials absorb and hold much heat.
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.