Fill that gap with the foam seal included with the unit.
How to seal window ac unit.
This means both covering the outside body of the ac unit with a plastic bag to weatherize it and then covering it with a heavy fabric cover to protect it from the elements.
Choose easy to use acrylic latex caulk when fixing a window air conditioner.
Then lift the window and place the seal under the lip of the window.
Re close the window tightly.
Most window air conditioners come with an accordion style flap attached to the sides to fill the open space.
To fix this purchase some air conditioner foam seal at your local hardware store if there isn t any with your unit.
Cut the seal if necessary to fit your window and.
So typically when you install a window air conditioner you have the window the upper part of the double hung window sits on top of the box and then it has sort of like wings that slide out the side of the air conditioner to kind of seal out the space between the air conditioner and the opening of the window correct.
If you don t feel like removing a whole ac unit and sealing off the window the other good option is to seal a window air conditioner for the winter.
Narrow or hard to reach gaps measure the length of gaps that are 1 8 inch thick or smaller.
How to seal an air conditioner window gap.
Ask a helper to hold the air conditioner unit in place while you raise the bottom window sash up enough so that you.
How to seal the outside of a window air conditioner that is mounted in a double paned window 1.
Position the end of the weatherstripping at one end of the bottom edge of the.
This type of caulk is beneficial as it seals gaps where moisture can penetrate and cause damage to the wall.
Tear off a length of rope caulk to match.
Even extremely small gaps can leak air which reduces the efficiency of your air conditioner.
Press the caulk into the gap.
Once the upper pane is secured there will be a gap between the two panes of the window.
Smooth the caulk and wipe away.
If the gap is deep you may need to press two pieces into the gap to fill it completely.
It provides an easy to paint surface once the job is done which helps to hide unsightly marks on the wall s surface.