"" Passive Low-e Glass | SUNGATE® 460 Glass by Vitro

SUNGATE® 460

Passive Low-E Glass

Lock in the warmth, all winter long.

Sungate® 460 Passive Low-E Glass

The latest advance in energy-efficient window glass, Sungate® 460 passive low-e glass keeps your home toasty in the winter and heating bills under wraps, too. Clear and neutrally reflective, Sungate® 460 glass transmits solar energy into your residence then traps it with furnace heat to create warm, comfortable and energy-efficient living spaces.

Designed for northern climates, Sungate® 460 glass has an exceptional center-of-glass winter nighttime U-value of 0.26 in a standard, ¾-inch double-pane insulating glass unit (IGU), more than twice the insulating power of the same double-pane unit made with clear glass.

When supplemented with quality framing and insulating spacers and gases, the center-of-glass performance of Sungate® 460 glass can facilitate overall window U-values of 0.30 and minimum SHGCs of 0.42 in double-pane window units, which qualifies windows for certification under the ENERGY STAR 6.0 standard.

Sungate® 460 glass has high visible light transmittance of 75 percent, which enables it to flood interiors with light and to achieve a clear glass appearance that harmonizes well with building materials such as brick, stone, wood and metal siding.

To learn more about Sungate® 460 glass and how it can help residential windows meet ENERGY STAR® performance standards for your area, click here to find a window dealer near you.

Glass Comparison

Sungate® 460 double glazed insulating glass unit vs. standard clear double insulating glass unit
Solar Heat Gain Coefficient
Visible Light
Ultraviolet Energy
Winter Furnace Heat

Double-Glazed IGU Comparison (¾" window thickness with 3mm glass)

COG (Center-of-Glass) Measures Double-Glazed IGU with Clear Glass Sungate® 460 (3) Double-Glazed IGU Benefits
Solar Heat Gain Coefficient 0.75 0.57 Transmits 24% less solar energy to keep homes cooler in the summer
Visible Light Transmittance 81% 75% High visible light transmittance, comparable to conventional clear glass
U-Value 0.48 0.26 Insulates 46% better than a standard clear insulating glass unit
Ultraviolet Energy 58% 17% Reduces fabric-fading UV energy three times more effectively than clear glass
       
Damage Weighted Transmittance * 0.74 0.56 Minimizes potential for fading damage by 55 percent compared to clear glass

Triple-Glazed IGU Comparison (1¼" window thickness with 3mm glass)

COG (Center-of-Glass) Measures Triple-Glazed IGU
Clear Glass
Sungate® 460 (3)
Triple-Glazed IGU
Sungate® 460 (3)/(5)
Triple-Glazed IGU
Benefits
Solar Heat Gain Coefficient 0.68 0.51 0.47 Transmits up to 31% less solar energy to keep homes cooler in the summer
Visible Light Transmittance 74% 68% 62% High visible light transmittance, comparable to conventional clear glass
U-Value 0.31 0.18 0.13 Insulates 46% better than a standard clear insulating glass unit
Ultraviolet Energy 48% 14% 5% Reduces fabric-fading UV energy 90% more effectively than clear glass
       
Damage Weighted Transmittance * 0.66 0.51 0.42 Minimizes potential for fading damage by 64 percent compared to clear glass
*Damage Weighted Transmittance is calculated according to a function called Tdw-ISO, developed by the International Standards Organization (ISO) and published by the International Commission on Illumination (CIE), the world’s leading technical organization on lighting and illumination. The Tdw-ISO calculation measures fading risk from solar radiation across the entire solar light spectrum, from UV light (280-380 nanometers) through visible light (390-780 nanometers). According to the CIE standard, which is considered more comprehensive than UV rating alone, Sungate® 460 glass can minimize fading damage across the entire solar spectrum more effectively than glass designed primarily to block UV light.
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