Highest Energy Efficiency Ratings

LOW E INSULATING GLASS COATINGS

Extremely thin coatings of special low emissivity (Low E) metallic material are applied to glass panes used in windows and doors to boost their energy efficiency and block out UV rays. Low E coatings are typically applied to the inside layers of insulating glass to manage the amount of light and heat transmitted through a window. A window with Low E coating can reject solar heat gain without reducing visible light. Since glass choice plays a big factor in window and door efficiency, your local Infinity partner can provide recommendations on the best selection for your home.

LOW E1: Low U-Factor
High solar heat gain

Primarily used in colder climates, Low E1 allows more heat in to warm a room while blocking heat loss. Achieve maximum benefits when used on elevations with direct sun exposure. Low E1 has one layer of metallic coating.

LOW E2: Low U-Factor
Medium solar heat gain

Low E2 offers year-round performance in moderate climates. It will help retain heat in your home during the winter and keep heat out during the summer. Low E2 has two layers of metallic coating. It also blocks 84% of the sun’s UV rays to reduce fading.

LOW E3: Lower U-Factor
Lower solar heat gain

Low E3 rejects solar heat while letting light in, resulting in increased performance in climates with intense sun exposure. Low E3 has three layers of metallic coating. It also blocks up to 95% of the sun’s damaging UV rays.

Low E3/ERS: Superior U-Factor
Lower solar heat gain

With an extra metallic layer on the room-side glass to reflect escaping heat back into the room, Low E3/ERS provides maximum efficiency year-round in all conditions. Low E3/ERS has four layers of metallic coating.

Frequently Asked Energy Efficiency Questions

Q: What does it mean to be an ENERGY STAR certified window or door?

A: No.

While an ENERGY STAR label help identify energy-efficient windows, every home is different. ENERGY STAR provides a one-size-fits-all guideline but does not take into consideration all the factors that make your home unique.

Infinity combines our Ultrex fiberglass frame with high-performing glass options for a beautiful and energy-efficient windows and doors. Ultrex fiberglass is far less thermally conductive than aluminum (5000x less) and insulates much like wood. This means that Ultrex provides an insulating barrier against extreme weather temperatures, keeping your home comfortable and helping to reduce heating and cooling costs.

Q: How do I know which glass option makes the most sense for my home?

A: No.

While an ENERGY STAR label help identify energy-efficient windows, every home is different. ENERGY STAR provides a one-size-fits-all guideline but does not take into consideration all the factors that make your home unique.

Infinity combines our Ultrex fiberglass frame with high-performing glass options for a beautiful and energy-efficient windows and doors. Ultrex fiberglass is far less thermally conductive than aluminum (5000x less) and insulates much like wood. This means that Ultrex provides an insulating barrier against extreme weather temperatures, keeping your home comfortable and helping to reduce heating and cooling costs.

Q: How do I know which glass option makes the most sense for my home?

A: When you are comparing window glass options, keep the following in mind:

• A “good” U-factor is <.30
• A “good” SHGC depends upon your climate
• If you live in a colder climate, you’ll generally want a replacement window with a low U-Factor and higher SHGC
• Generally, you’ll want a lower SHGC if you live in a warmer climate with intense sun