If you only need this fan sometimes then i would instead open the window keep the screen in place and put like a desk or dresser in front of the window so that it is the same height as the.
How to secure a box fan in a window.
You can use a standard tall fan on a stand or place a box fan on a table in front of the window.
Choose the right fan and number.
A box fan or fans one will have some benefit but i recommend having more than one box fan set up in order to maximize the effects.
Step by step instructions.
Aim to set up an equal number of in and out blowing fans.
Box fans placed in or near windows can help draw in cool air from outside or pull warm air out of a room depending on how they are placed.
If the blades face the window screen the fan helps pull.
Get some wood dowels and stick them in the window channels above the sash that you have open i e.
If you have an odd number configure the extra one to pull air in.
Safe secure and more the best choice for window fan installation.
The more window fans you have working the better.
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As an alternative consider purchasing a window exhaust fan that fits directly inside your window sill.
Illig on june 2010.
The one that s keeping the fan in.
A window a suitable window should be identified.
This will stop the window from being lifted up.
A way to secure the fan in place this could be as simple as ensuring it fits the window properly.