Efficient windows and doors from Pella can reduce your utility bill and add comfort to your home. We’ve designed our products to deliver exceptional energy efficiency for savings and home comfort year-round.
What Impacts Energy Performance
Low-emissivity (Low-E) glass is a glass coating that improves the energy efficiency of your windows and patio doors. In the winter, Low-E glass reflects heat back into the room, keeping it warmer. In the summer, it reflects heat away from your home, keeping it cooler. Additionally, this glass blocks most of the sun’s harmful UV rays, helping to prevent your carpet, furniture and window treatments from fading.
Air infiltration in windows and doors is more commonly referred to as leaks and drafts. This happens in areas with gaps, such as between window sashes or between the window frame and the wall. It can happen because of improper installation, poor manufacturing or as a home settles naturally over the years. To help prevent infiltration, proper installation and insulation are key.
Conduction is the transmission of heat or cold through a material. In windows and patio doors, conduction occurs when there is a temperature difference on each side of the glass. In the summer, conduction occurs when warm air tries to get into the cool home. In the winter, conduction occurs when cold air leaks into the warm home. Multiple panes of glass and insulating gas, like argon, can help slow the effects of conduction.
Maximizing Energy Efficiency and Performance
Pella uses an infrared camera to visually show the efficiency of the glass in the window. We compare double-pane glass with no coatings or argon gas to double-pane glass with Low-E coating and argon gas. See what helps keep your home warmer in the winter and cooler in the summer.
Your Home's Energy Efficiency
Make your home more comfortable and improve its energy performance with energy efficient windows and patio doors.
Upgrade to optional triple-pane glass for increased insulating air space.
Insulated glass slows heat transfer, keeping your home a more comfortable temperature.
Types of Low-E Glass
Select a glass coating that has been optimized for your climate.
Proper installation is key for windows and doors to perform at their best.
Glass Types & Coating Options
Energy-efficient windows use two or three panes of glass to slow conduction and maintain comfort. Choose to add optional argon gas between the panes to act like an insulating blanket and reduce heat transfer. A virtually invisible Low-E coating is applied to the glass to help reflect heat and keep your home comfortable. Depending on your climate, a glass coating will be selected to increase the performance of your windows and patio doors.
Our windows and doors are engineered for energy efficiency. We’ve designed the entire window, including the frame and sash, to perform at its best. And we test them to the extremes so you can count on them to last. Optional foam insulation can further increase energy performance.
ENERGY STAR Certification
ENERGY STAR certified windows and doors help to conserve energy. With new or replacement windows and patio doors that are ENERGY STAR certified, you can help lower your utility costs and enhance your home’s comfort. We have several products that are identified as the ENERGY STAR Most Efficient, meaning they meet more stringent energy requirements.
No matter where you live, Pella has the right glass option for you. Our InsulShield® glass collection offers our most innovative energy-saving choices, designed for your specific climate types.
Advanced Low-E Insulating Glass with Argon7
- Two panes of glass with Advanced Low-E protection and insulating argon between the panes. Blocks 84% of the sun’s ultraviolet rays.
- Three panes of glass also available on select product lines for increased energy efficiency. Blocks 86% of the sun’s ultraviolet rays.
- Best use: Many US climates
AdvancedComfort Low-E Insulating Glass with Argon7
- Two panes of glass with Advanced Low-E protection and insulating argon between the panes. Blocks 85% of the sun’s ultraviolet rays.
- Three panes of glass also available on select product lines for increased energy efficiency. Blocks 87% of the sun’s ultraviolet rays.
- Best use: Northern US climates
SunDefense™ Low-E Insulating Glass with Argon7
- Two panes of glass with SunDefense Low-E protection and insulating argon between the panes. Blocks 94% of the sun’s ultraviolet rays.
- Three panes of glass also available on select product lines for increased energy efficiency. Blocks 95% of the sun’s ultraviolet rays.
- Best use: Very hot, sunny climates
NaturalSun Low-E Insulating Glass with Argon7
- Two panes of glass with NaturalSun Low-E insulating argon between panes. Blocks 69% of the sun’s ultraviolet rays.
- Three panes of glass also available on select product lines for increased energy efficiency. Blocks 73% of the sun’s ultraviolet rays.
- Best use: Cold climates, like far northern US and Canada
ENERGY STAR FAQs
ENERGY STAR is the U.S. Environmental Protection Agency's (EPA) voluntary program that helps businesses and individuals save money and protect our climate through superior energy efficiency. Introduced in 1992, the EPA's ENERGY STAR program has been designed to identify and promote energy-efficient products to reduce greenhouse gas emissions.
ENERGY STAR is the simple choice for energy efficiency achievements. People across America have looked to the EPA's ENERGY STAR program for guidance on how to save energy, save money, and protect the environment. Behind each blue label is a product, building, or home that is independently certified to use less energy and cause fewer of the emissions that contribute to climate change. Today, ENERGY STAR, is the most widely recognized symbol for energy efficiency in the world, helping families and businesses save $24 billion in 2012 alone. For more information go to energystar.gov.