Glass Options
Andersen products feature high-performance glass that is heat strengthened for increased durability and has argon gas blend used between the glass panes for additional insulation. This is why Andersen products with high-performance glass carry a transferable Owner-to-Owner® 20-year limited warranty. We even cover the glass with a removable translucent film for added protection during the installation process.
American Craftsman products feature a variety of energy efficient glass options including optional argon gas blend to increase insulation and performance.
Choosing the Right Glass

Low-E / Low-E4® Glass
Ideal for: All Climates

SmartSun™ Glass
Ideal for: Southern Climates

Sun Glass
Ideal for: Southern Climates

PassiveSun® Glass
Allows more heat form the sun's rays into the home, helping to reduce heating costs in colder climates.
Ideal for: Northern Climates

Triple-Pane Glass
While the added energy efficiency of triple-pane glass can be beneficial in all regions, its impact is most significant in colder climates where more months of the year are spent heating the home. The extra pane of glass improves thermal performance and helps keep more heat in and cold air out, meaning inside temperature is less effected by the temperatures outdoors. Triple Pane glass is only available on our Andersen A-Series windows and patio doors.
Ideal for: Northern Climates

HeatLock® Technology

Dual-Pane Glass
Additional Glass Options
Coastal Protection: Some products are available with impact-resistant glass for coastal areas, visit our coastal page for more information. See your local code official for requirements in your area.
Laminated Glass: For added strength, enhanced security and sound control.
Tempered Safety Glass: Standard on all patio doors and at times is required by local building codes on windows depending on size and location.
Patterned Glass: To let in light while providing a greater degree of privacy.
Other Glass Considerations
U-Factor: Indicates how well a product prevents heat from escaping, which can lead to lower heating bills in cold weather. The lower the number the better.
Solar Heat Gain Coefficient (SHGC): Measure how well a product blocks heat caused by sunlight, which can help lower cooling costs in warmer months. The lower the number, the more it blocks heat from the sun.
Visible Light Transmittance: Refers to the amount of light that comes through the glass and is not the same across glass options. Glass tints or additional coatings help make glass better performing, but can affect visible light transmittance.
UV Protection: How well glass blocks ultraviolet rays, which can damage interior surfaces such as carpet, furniture and drapes.