Single-Glazed with Clear GlassThis figure illustrates the performance of a typical single-glazed unit with clear glass. Relative to all other glazing options, single-glazed with clear glass allows the highest transfer of energy (i.e. heat loss or heat gain depending on local climate conditions) while permitting the highest daylight transmission. |
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 - Single-Glazed with Clear Glass
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Frame |
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U-Factor |
1.16 |
1.00 |
.84 |
.84 |
.84 |
.84 |
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SHGC |
.76 |
.70 |
.64 |
.64 |
.64 |
.64 |
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VT |
.75 |
.70 |
.65 |
.65 |
.65 |
.65 |
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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. |
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Skylight Properties - Single-Glazed with Clear Glass
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Frame |
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U-Factor |
2.48 |
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SHGC |
.78 |
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VT |
.70 |
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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. |
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Single-glazed Clear |
Single-glazed with Bronze/Gray Tint
Double-glazed Clear |
Double-glazed with Bronze/Gray Tint |
Double-glazed with High Performance Tint
Double-glazed with High-Solar-Gain Low-E, Argon/Krypton Gas |
Double-glazed with Moderate-Solar-Gain Low-E, Argon/Krypton Gas |
Double-glazed with Low-Solar-Gain Low-E, Argon/Krypton Gas
Triple-glazed with High-Solar-Gain Low-E, Argon/Krypton Gas |
Triple-glazed with Low-Solar-Gain Low-E, Argon/Krypton Gas
Glazing Types | Frame Types | Operating Types | Low-E Coatings | Gas Fills | Spacers | Emerging Technologies