Pella’s Designer series windows are great quality with the look you want. In addition to the wide variety of interior and exterior finishes, the Designer series are custom made windows to fit your home. This allows for easy installation as well as eliminating the expenses involved with making the house fit the window. Pella’s Designer series windows will add value to your home and make both the interior and exterior of your house beautiful as well as adding value. Pella’s Designer series double-hung windows are beautiful in any home, from classic to contemporary. They can be raised from the bottom or lowered from the top for two levels of ventilation.