1. Measure the inside surface at the top, middle, and bottom, then record the shortest width that fits your size.
   Order Width=Measured Width = Whole Item Width
2. Measure the inside surface at the left, middle, and right, then record the shortest height that fits your size.
   Order Height=Measured Height= Whole Item Height

* We will deduct 0.5'' for mount safety clearance

1. Measure the top,middle, and bottom width of the outside window frame, then record the maximum width that fits your size.
   Order Width = Measure width+6''=Whole Item Width
2. Measure the left,middle,and right height of the outside window frame, then record the maximum height that fits your size.
   Order Width = Measure Height+6''= Whole Item Height