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.
sliding door