Fan In Window Facing In Or Out

If you have an odd number configure the extra one to pull.

Place one or two fans on the lower level in the window facing in so that fresh air is simultaneously drawn into the house. The more window fans you have working the better. Aim to set up an equal number of in and out blowing fans. An open window near the floor and a fan blowing out near the ceiling.

The ideal situation to cool a hot room with cool air from outside assuming you have only one fan is this. It also depends on the nature of the airflow. If you are trying to cool your place and the air outside is. Whether it s in a straight line or has to bend around corners and the total volume of air you re trying to cool.

If the fan is the heat source then yes point it at the closest window. Place one or two fans in upstairs windows with the fans facing out. A fan blowing cool air in will mix the incoming cool air with the warm air from the room. More effective than pointing the fan out the window would be positioning it so you are in between the fan and the window since the air current will have a cooling effect on your skin.

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When using a box fan in a window the decision as to which direction you are blowing air should be based on what you are trying to do. This will eventually cool the room but will take longer.