 filtering out what can get through your windows. So if you have central AC or in a room where you're running window units, definitely close those storm windows. And lastly, let's talk about ceiling fans. Now, most ceiling fans are reversible. You really want to take advantage of that. The ceiling fan direction in summer should be counterclockwise. This creates a downdraft, which creates a direct cooling breeze. Now, in winter, the fan needs to be clockwise, and that creates an updraft and circulates warm air around the room.