Why pay more to heat and cool your home?
One of the most common reasons to replace existing windows is to increase the energy
efficiency of your home — which reduces your heating and cooling bills and lowers
greenhouse gas emissions. Pella windows are up to 74 percent more energy efficient1.
You'll notice the savings immediately, because poorly performing windows and doors
cause heating and cooling loss in your home. Don’t throw money out the window!
Be sure to look for these energy-efficient features:
1. Multiple panes of glass
Double-pane glass insulates almost twice as well as single-pane. Triple-pane glass
maximizes your energy efficiency.
2. Low-E (Low-emissivity) glass coatings
These are layers of thermal protection inside insulating glass that help:
- Reflect summer heat and retain interior cooling.
- Reflect winter cold and retain interior heat.
- Block harmful UV rays to help prevent fade damage.
3. Argon (inert gas) between the glass panes
Argon2 is a natural, colorless, nontoxic gas that's denser than air.
It adds layers of insulation to further reduce the transfer of heat or cold, making
your home even more energy-efficient and comfortable.
4. ENERGY STAR qualified
Pella products offer the energy-efficient options that will meet or exceed ENERGY
STAR® guidelines in all 50 states.3 American
households are saving significantly on their energy bills by using ENERGY STAR certified
Learn more about ENERGY STAR.
5. Pella’s InsulShield® energy performance glass
Pella InsulShield® energy performers include:
6. Look for energy-efficient window frames
- Wood frames are excellent insulators — they conduct less heat or cold into your
home. In fact, they insulate 1,800 times better than aluminum.
- Fiberglass composite material offers the insulating properties of wood. It won't
expand and warp in the summer, or shrink and turn brittle during winter.
- Vinyl multi-chambered frames reduce heat loss for added energy efficiency ― and
they’re exceptionally easy to care for.
- Aluminum is inexpensive and durable but has a poorer insulation rating, meaning
the frames conduct more heat or cold into your home.
7. Tight seals
Windows and doors that don’t seal properly are drafty — affecting your comfort level
and increasing your energy costs. Rest assured, Pella tests its products in state-of-the-art
facilities to make sure they meet or exceed industry performance standards.
8. Quality installation.
If installed incorrectly, your windows and doors may not operate properly. Proper
installation will help prevent air infiltration and even costly water damage to
9. The NFRC label
It's the only reliable way to determine the entire window’s energy performance and
to compare products realistically.
The National Fenestration Ratings Council (NFRC) is a nonprofit organization for
the window industry that developed an energy rating system based on whole-unit product
performance — not just the glass.
The U-Factor represents the rate of heat flowing out of a window
or door in an hour. The lower the number, the better the glass insulates.
The Solar Heat Gain Coefficient (SHGC) rating measures the amount
of solar radiation that enters as heat. The lower the number, the less heat the
glass allows in.
Learn more about the NFRC label
1 Calculated based on NFRC ratings for a Pella Designer Series Advanced
Low-E triple-pan wood window compared to a single-pane window in winter conditions.
2 High-altitude Low-E insulating glass does not contain argon gas in
3 Some products may not meet ENERGY STAR guidelines in Canada. For more
information, contact your local Pella sales representative or go to energystar.gc.ca.