How To Seal Off A Window Unit

The symptoms of failed window seals are easy to spot.

How to seal off a window unit.

Re close the window tightly. Then lift the window and place the seal under the lip of the window. Gaps around an unsealed air conditioning unit will allow. 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.

Window air conditioners are an affordable option for home cooling. To fix this purchase some air conditioner foam seal at your local hardware store if there isn t any with your unit. 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. 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.

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 come with an accordion style flap attached to the sides to fill the open. However it is important to properly seal them to avoid energy loss. Stick the plastic to the tape taking care to seal off the window at every corner and side.

Press the plastic over the tape to ensure a good seal and effectively seal any remaining cold air that could enter your home through the window air conditioner. 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.