Insulating glass

Control heat, stay comfortable

Guardian insulating glass offers dramatically improved thermal performance, regardless of the climate. Our insulating glass can transmit light beautifully, maintain ideal indoor temperatures and meet sustainability requirements. And our proprietary warm-edge spacers feature a stainless-steel design, reducing both condensation and U-values.

How insulating glass works

Insulating glass refers to two or more lites of glass sealed around the edges with an air space between, forming a double- or triple-pane unit. Commonly referred to as an “IG unit,” insulating glass is the most effective way to reduce air-to-air heat transfer through glazing. The air space may be filled with an inert gas such as Argon to further reduce heat transfer and increase total comfort. When used in conjunction with low-E and/or reflective glass coatings, IG units become effective in conserving energy and complying with energy codes.

Insulating coatings

Guardian coatings provide substantial improvements to insulated glass units. Compared to uncoated insulating glass, SunGuard^® coatings offer up to 50 percent in U-values and solar heat gain coefficients. Explore Guardian insulated glass coating options below, or contact your Guardian Glass sales representative for more information.

Residential

To see all of the low-E coatings that Guardian Glass has to offer for residential glass, explore the ClimaGuard^® residential glass product line:

Guardian Glass - ClimaGuard - 80/70 - man and daughter playing

ClimaGuard 80/70

ENERGY STAR^® Northern Zone

Selectively lets visible light in to brighten and warm northern homes naturally, and provides insulation to stop heat from escaping

Guardian Glass - ClimaGuard - 72/57 - man listing to music, snowy landscape and mountain outside window

ClimaGuard 72/57

ENERGY STAR^® Northern and North-Central Zones

Provides ample light, solar heat gain and retains heat indoors in climates with cold winters

Guardian Glass - ClimaGuard - 53/23 - photo of young African America woman reading on sofa with glass of juice

ClimaGuard 53/23

South-Central and Southern ENERGY STAR^® Zones

Cools homes in warm, southern climates with triple silver protection to lower solar heat gain and U-value

Guardian Glass - ClimaGuard - IS-20 - a group of friends playing a game

ClimaGuard IS-20

All ENERGY STAR^® Zones

Enhances performance by lowering U-value of standard low-E windows to help meet energy codes

Guardian Glass - ClimaGuard - Casacor living room by Daniela Coinaghi

ClimaGuard^®

Residential glass that welcomes natural light to enhance energy efficiency and comfort.

Commercial

To see all of the low-E coatings that Guardian Glass has to offer for residential glass, explore the SunGuard^® coated glass product line:

Guardian Glass SunGuard SNX 62/27 - Golden 1 Center exterior photo

SNX 62/27

The most impressive light-to-solar-gain ratio from SunGuard coated glass

Guardian SunGuard SNX 51/23 - T-Mobile Arena exterior

SNX 51/23

An attractive neutral blue reflected color and superior solar control

Guardian Glass North America - crane shed commons

SN 68

Clear exterior appearance, 68% light transmission, 38% solar factor

Guardian Glass SunGuard IS 20 - Crane Shed Commons exterior photo dusk

IS 20

An interior surface coating to lower U-value

Guardian Glass SunGuard - Hearst Corporation building

SunGuard^®

High-performance architectural glass that helps architects and designers Build With Light^®.

Insulating glass for appliances

Guardian Glass offers IG units and coatings to help commercial refrigerators meet ENERGY STAR®, EPA and EISA compliance.

Refrigerators in the dairy section of a supermarket that use Guardian ThermaGuard glass

ThermaGuard^®

A range of low-E, anti-reflective (AR) and hybrid products that set new standards for performance and aesthetics in refrigeration