How To Seal Ac Window Gap

Most window air conditioners have an expanding curtain on either side to help seal any gaps between the window frame and the air conditioner but sometimes this seal isn t perfect.

How to seal ac window gap.

Most window air conditioners come with an accordion style flap attached to the sides to fill the open. Neglecting to fill the window gap with the foam seal makes your window unit work harder to control the indoor temperature and potentially lets moisture dust and insects enter your home as well. In addition to getting a product to block your long window gaps you should also consider getting a pulley seal which is specially made to block the air that slips in near window cords. Even extremely small gaps can leak air which reduces the efficiency of your air conditioner.

Most window air conditioners have an expanding curtain on either side to help seal any gaps between the window frame and the air conditioner but sometimes this seal isn t perfect. Re close the window tightly. What s the best way to fill that gap. Window air conditioners sit on the windowsill and typically have accordion style fins on either side of the unit that act to seal off the window.

To fix this purchase some air conditioner foam seal at your local hardware store if there isn t any with your unit. Then lift the window and place the seal under the lip of the window. I have an air conditioner that looks similar to this except mine doesn t have the flaps on the sides leaving a large open gap between the air conditioner and the window frame. But if done incorrectly it can lend a sloppy amateurish look.

Once you ve made your choice on what product will give the best result for you you can head on over to the hardware store and pick it up. Unfortunately these are rarely anything close to air tight and the air conditioner itself has to allow air in from the outside by virtue of its construction. Caulking windows to give them a finished look inside and out and seal out leaks and drafts is a fairly common diy task.