HOW TO: IDENTIFY THAT YOUR WINDOW IS AN ANDERSEN WINDOW 

Andersen 100, 200, 400 and A-Series products have the Andersen logo etched in the glass. The logo is located on the interior bottom right-hand corner of the window. See example below. The etched logo provides the date of manufacture and type of glass only.  This logo does not identify the style, series or specific window details.

The product id label shown provides the manufacture date. Andersen began putting Product Identification labels on windows & patio doors in 2007. For details on where the product identification label on products is located view this Product Label Identification Guide.