1Based on the force required to bend a window frame profile.
2Improved window energy efficiency calculated in a computer simulation using RESFEN 5.0 default parameters for a 2,000-square-foot existing single-story home when comparing a Pella 250 Series vinyl window with InsulShield® Advanced Low-E triple-pane glass with argon to a single-pane wood or vinyl window. For more details see pella.com/methodology.
3Warning: Use caution when children or pets are around open windows and doors. Screens are not designed to retain children or pets.
4Glass options can be upgraded to offer the benefits of our InsulShield glass collection. Glass options may vary by product.
5Optional high-altitude Low-E insulating glass does not contain argon in most products. Please see your local Pella sales representative for more information.
6Reduction in outside noise based on OITC ratings compared to an open window.