Install the air conditioner. Some window air conditioners are quite heavy — you may need a helper. If the air conditioning unit needs to be cleaned, do it now before it is installed.; With the window open, lift the air conditioning unit into the window opening until the wings are even with the window jamb, centering it in the opening.. The Frost King air conditioner weather kit provides extra insulation when installing a window air conditioner. The kit contains two "L" shaped strips one for the top and the other for the bottom of the air conditioner plus a flat one for between the window panes. The strips are 33 inches long and fit my standard 36" window without needing to be.
Once the window air conditioner is secure, keep the warm air outside and the cool air inside. Extend the accordion panels from both sides of the air conditioner to the window sash track. Secure the side panels with screws. Window air conditioners often come with a foam insulating strip. Cut the strip of foam to the correct length.. 5. Install the Air Conditioner. Now, it's time to install the air conditioner itself: Slide the unit into the brackets: Carefully lift the air conditioner and slide it into the mounting brackets. Ensure it sits securely and is level. Secure the unit: Use the provided screws or bolts to fasten the air conditioner to the brackets.