 He says whether or not you have AC, you should let nature help you cool your home. That means that in the morning, we could open windows up, have that kind of heat escape out of the house, have that cool come in. That'll offset how much that air conditioner has to work later on that day. Your air conditioner can usually only make your home about 20 degrees cooler than it is outside. And if we're pushing past that 20 degree difference in temperature from outside to inside, your AC is not going to bring it there. So if it's 100 degrees out,