1
Improved 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 Designer Series wood 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.
2
Improved 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 350 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.