How To Seal Off A Window Unit

The symptoms of failed window seals are easy to spot.

How to seal off a window unit.

Window air conditioners are an affordable option for home cooling. 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. 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. However it is important to properly seal them to avoid energy loss.

The multi pane glass develops condensation or fogginess that can t be wiped off from either side of the window. 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. Gaps around an unsealed air conditioning unit will allow. Then lift the window and place the seal under the lip of the window.

Step 3 examine the sash. Most window air conditioners come with an accordion style flap attached to the sides to fill the open. Stick the plastic to the tape taking care to seal off the window at every corner and side. 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.

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. To fix this purchase some air conditioner foam seal at your local hardware store if there isn t any with your unit.