How to Force Air Circulation Behind Blinds

Raise horizontal blinds up so the bottom of the blinds is an inch or 2 above the sill. If the blinds are vertical, either cut the bottoms of the slats so that there’s about 1 inch of clearance or turn a couple of slats sideways. The goal is to prevent the blinds from fully covering the entire opening in the wall where the window is.

Place a table fan a few feet away from the window, at a slight angle. Ensure that once you turn the fan on, the airflow will be diagonal to the windowpane and not hitting it head on. If you aim it straight toward the window, the airflow will press the blinds into the glass.

Turn on the fan. Reposition it so that the blinds aren’t wildly swinging back and forth, although some movement is inevitable. This will mean that you won’t have as much privacy as you would with the blinds fully closed; but in order to force air behind the blinds, you will have to move them away from the glass. Remember this if you have to do something like change clothes, turn off the fan first and steady the slats or lower the blinds.