The Efficient Windows Collaborative

Double-glazed, High-solar-gain Low-E Glass, Argon/Krypton Gas

This figure illustrates the characteristics of a typical double-glazed window with a high-solar gain low-E glass with argon gas fill. These windows are designed to reduce heat loss but admit solar gain. High-solar-gain low-E glass products are best suited for buildings located in heating-dominated climates and are the product of choice for passive solar design projects.

High-solar-gain low-E glass is often made with pyrolytic low-E coatings, although sputtered high-solar-gain low-E is also available.

Center of Glass Properties

Note: These values are for the center of glass only. They should only be used to compare the effect of different glazing types, not to compare total window products. Frame choice can drastically affect performance.

Whole Window Properties - Double-glazed, High-solar-gain Low-E Glass, Argon/Krypton Gas


Frame	Metal Frame	Metal Frame with Thermal Break	Non-metal Frame	Non-metal Frame, Thermally Improved
U-Factor	0.56-0.70	0.41-0.55	0.31-0.40	0.26-0.30
SHGC	>0.60	0.41-0.60	0.41-0.60	0.41-0.60
VT	>0.60	0.51-0.60	0.51-0.60	0.51-0.60
Note: The thermal performance properties of specific glazings and frames can vary depending on product design and materials. The results presented here are averages. Consult specific manufacturers for NFRC rated U-factors and SHGCs for products of interest.

Single-glazed, Clear Glass | Single-glazed, Tinted Glass
Double-glazed, Clear Glass | Double-glazed, Tinted Glass | Double-glazed, High-performance Tinted Glass
Double-glazed, High-solar-gain Low-E Glass, Argon/Krypton Gas | Double-glazed, Moderate-solar-sain Low-E Glass, Argon/Krypton Gas | Double-glazed, Low-solar-gain Low-E Glass, Argon/Krypton Gas
Triple-glazed, High-solar-gain Low-E Glass, Argon/Krypton Gas | Triple-glazed, Low-Solar-Gain Low-E Glass, Argon/Krypton Gas