Designer Series windows and patio doors with triple-pane glass are #1 for energy efficiency among top national brands.1
- Pella Wndows are up to 74% more energy efficient 2 and can help you save nearly 1/3 on your heating and cooling bills.3
- These products exceed ENERGY STAR® guidelines in all 50 states.4
- Snap-in between-the-glass window fashions increase the energy savings.

1 Superior NFRC U-Factors and SHGC ratings.
2 Calculated based on NFRC ratings for a Pella Designer Series wood triple-pane window compared to a single-pane wood window in winter conditions.
3 Calculated based on average projected energy savings in a computer simulation using Lawrence Berkeley National Laboratory Resfen 5.0 standard criteria for a 2,000 square foot home.
4 Some Pella products may not meet ENERGY STAR guidelines in Canada. For more information, contact your local Pella representative or go to energystar.gc.ca.