Pella® 350 Series Double Hung window

Features ·Stronger and more durable than typical vinyl products ·Up to 83% more energy efficient with optional triple-pane glass ·Virtually invisible SmoothSeamTM interior welded corners ·Easy-wash, tilt-in sash feature *Calculated based on average projected energy savings in a computer simulation using Lawrence Berkeley National Laboratory Resfen 5.0 stndard criteria for a 2,000-square-foot home when comparing a Pella 350 Series vinyl window with InsulShield(R) Advanced Low-E triple-pane glass with argon to a single-pane vinyl window.