Most windows have a label containing the Order number and Line number. The Order number can be found in the upper left-hand corner of the label as a six-digit number. The following three-digits indicates the Line number. The location of the label depends on the window type.
Please see the window types below for photos, instructions and videos to help you locate the numbers.
The label can be found on the bottom of the window sash, accessible when the window is opened.
The label can be found on the bottom of the awning sash, accessible when the window is opened.
The label can be found on the side of the screen door opposite of the handle, on the top or the bottom of the frame.
The label can be found under the bottom hinge of the swing door.
For window types not shown above, such as picture windows, please locate the Order Number on a different window that was installed at the same time.