Secure the side panels with screws.
Install a window air conditioner in the wall.
Pull the unit forward while an assistant holds the case until it is fully withdrawn.
This allows for a replacement unit which might be larger.
Install the case or sleeve into the opening.
Extend the accordion panels from both sides of the air conditioner to the window sash track.
Then measure the width of your through the wall air conditioner and transfer that measurement to the wall where the studs were marked.
Once the window air conditioner is secure take some final steps to help keep the warm air outside and the cool air inside.
Your appliances should also have come with an installation guide that you can tape onto the wall and trace its outline.
Once you locate 3 4 wall studs mark them on the drywall with an x using a pencil.
Build a jamb box of 1 6 pre primed pine about 4 inches wider and 4 inches taller than the air conditioner required.
Remove unit front cover and screws that hold the unit inside its case.