PPG Commercial One-Inch Insulating Glass Unit Comparisons Using 1/4" (6mm) Glass**

Insulating Vision Unit Performance Comparisons1 1-Inch (25mm) units with 1/2-inch (13mm) airspace and two 1/4-inch (6mm) lites; interior lite clear
Glass Type Transmittance2 Reflectance2 U-Value3
(Imperial)
K-Value3
(Metric)
Shading Coefficient4 Solar Heat Gain Coefficient5 Light to Solar Gain6
(LSG)
Ultraviolet % Visible % Total Solar Energy % Visible Light % Total Solar Energy % Winter Night Time Summer Day Time Winter Night Time Summer Day Time
Uncoated
Clear Glass 50 79 61 15 12 0.47 0.50 2.67 2.84 0.81 0.70 1.13
SOLEXIA™ Tinted Glass 25 69 39 13 8 0.47 0.50 2.67 2.84 0.57 0.49 1.41
ATLANTICA Tinted Glass 13 60 29 11 7 0.47 0.50 2.67 2.84 0.47 0.39 1.50
CARIBIA Tinted Glass 20 60 28 11 7 0.47 0.50 2.67 2.84 0.45 0.39 1.54
AZURIA Tinted Glass 34 61 28 11 7 0.47 0.50 2.67 2.84 0.45 0.39 1.56
SOLARBRONZE® Tinted Glass 21 47 39 9 7 0.47 0.50 2.67 2.84 0.59 0.51 0.92
SOLARGRAY® Tinted Glass 20 40 33 7 7 0.47 0.50 2.67 2.84 0.52 0.45 0.89
OPTIGRAY® 23 Tinted Glass 6 21 15 6 5 0.47 0.50 2.67 2.84 0.34 0.29 0.72
GRAYLITE® Tinted Glass 6 12 19 5 5 0.47 0.50 2.67 2.84 0.39 0.34 0.35
Coated
SOLARCOOL® Glass (Reflective)
SOLARCOOL (1) SOLEXIA 7 27 18 37 31 0.47 0.50 2.67 2.84 0.32 0.28 0.96
SOLARCOOL (2) SOLEXIA 7 27 19 24 12 0.48 0.50 2.73 2.84 0.36 0.31 0.87
SOLARCOOL (1) CARIBIA 6 23 12 37 30 0.47 0.50 2.67 2.84 0.25 0.22 1.05
SOLARCOOL (2) CARIBIA 6 24 12 19 9 0.48 0.50 2.73 2.84 0.30 0.25 0.96
SOLARCOOL (1) AZURIA 10 23 11 37 30 0.47 0.50 2.67 2.84 0.25 0.21 1.10
SOLARCOOL (2) AZURIA 10 24 12 20 10 0.48 0.50 2.73 2.84 0.29 0.25 0.96
SOLARCOOL (1) Bronze 6 18 21 37 31 0.47 0.50 2.67 2.84 0.35 0.31 0.58
SOLARCOOL (2) Bronze 6 19 21 14 12 0.48 0.50 2.73 2.84 0.40 0.34 0.56
SOLARCOOL (1) Gray 6 15 17   37 30 0.47 0.50 2.67 2.84 0.32 0.27 0.59
SOLARCOOL (2) Gray 6 16 18 11 10 0.48 0.50 2.73 2.84 0.36 0.31 0.52
SOLARCOOL (1) GRAYLITE 2 5 12 36 30 0.47 0.50 2.67 2.84 0.26 0.22 0.23
SOLARCOOL (2) GRAYLITE 2 5 12 5 6 0.48 0.50 2.73 2.84 0.31 0.26 0.19
SOLARBAN® 60 Solar Control Low-E Glass
SOLARBAN 60 (2) Clear 19 70 33 11 30 0.29 0.28 1.65 1.55 0.44 0.38 1.84
SOLARBAN 60 (3) SOLEXIA 8 60 25 11 11 0.29 0.28 1.65 1.55 0.42 0.37 1.62
SOLARBAN 60 (3) ATLANTICA 4 52 20 10 8 0.29 0.28 1.65 1.55 0.35 0.31 1.68
SOLARBAN 60 (3) CARIBIA 8 54 20 9 7 0.29 0.28 1.65 1.55 0.36 0.31 1.74
SOLARBAN 60 (3) AZURIA 10 54 21 9 7 0.29 0.28 1.65 1.55 0.36 0.31 1.74
SOLARBAN 60 (3) Bronze 8 41 20 8 17 0.29 0.28 1.65 1.55 0.37 0.32 1.35
SOLARBAN 60 (3) Gray 8 35 18 7 13 0.29 0.28 1.65 1.55 0.33 0.29 1.25
SOLARBAN 60 (3) OPTIGRAY 23 3 18 9 5 6 0.29 0.28 1.65 1.55 0.22 0.19 1.00
SOLARBAN 60 (3) GRAYLITE 2 11 8 5 10 0.29 0.28 1.65 1.55 0.21 0.18 0.65
SOLARBAN® 80 Solar Control Low-E Glass
SOLARBAN 80 (2) Clear

13

47 20 33 38 0.29 0.27 1.65 1.55 0.28 0.24 1.96
SOLARCOOL® (Reflective) Glass with SOLARBAN 60 Solar Control Low-E (3)
SOLARCOOL (2) SOLEXIA + Low-E 3 24 10 24 15 0.29 0.28 1.65 1.55 0.22 0.19 1.26
SOLARCOOL (2) CARIBIA + Low-E 2 20 8 19 10 0.29 0.28 1.65 1.55 0.19 0.17 1.31
SOLARCOOL (2) AZURIA + Low-E 4 21 8 19 10 0.29 0.28 1.65 1.55 0.19 0.17 1.31
SOLARCOOL (2) Bronze + Low-E 3 17 9 14 18 0.29 0.28 1.65 1.55 0.21 0.18 0.94
SOLARCOOL (2) Gray + Low-E 2 14 7 11 14 0.29 0.28 1.65 1.55 0.20 0.17 0.88
SOLARCOOL (2) GRAYLITE + Low-E 1 4 4 5 10 0.29 0.28 1.65 1.55 0.15 0.13 0.33
SUNGATE® 100 Low-E Glass
SUNGATE 100 (2) Clear 35 73 44 12 20 0.31 0.30 1.76 1.70 0.59 0.52 1.40
SUNGATE 100 (3) SOLEXIA 18 63 30 10 10 0.31 0.30 1.76 1.70 0.48 0.41 1.54
SUNGATE 100 (3) ATLANTICA 10 55 23 9 7 0.31 0.30 1.76 1.70 0.39 0.33 1.67
SUNGATE 100 (3) CARIBIA 14 56 23 9 7 0.31 0.30 1.76 1.70 0.38 0.33 1.70
SUNGATE 100 (3) AZURIA 24 56 23 9 7 0.31 0.30 1.76 1.70 0.38 0.33 1.70
SUNGATE 100 (3) Bronze 15 44 28 7 12 0.31 0.30 1.76 1.70 0.46 0.40 1.10
SUNGATE 100 (3) Gray 14 36 24 7 10 0.31 0.30 1.76 1.70 0.41 0.35 1.03
SUNGATE 100 (3) OPTIGRAY 23 5 19 11 5 6 0.31 0.30 1.76 1.70 0.25 0.21 0.90
SUNGATE 100 (3) GRAYLITE 4 11 12 5 8 0.31 0.30 1.76 1.70 0.27 0.23 0.48
SOLARCOOL®Glass (Reflective) with SUNGATE 100 Low-E (3)
SOLARCOOL (2) SOLEXIA + Low-E 5 25 13 24 14 0.31 0.30 1.76 1.70 0.26 0.23 1.09
SOLARCOOL (2) CARIBIA + Low-E 4 21 9 19 10 0.31 0.30 1.76 1.70 0.21 0.18 1.17
SOLARCOOL (2) AZURIA + Low-E 7 22 9 19 10 0.31 0.30 1.76 1.70 0.21 0.18 1.22
SOLARCOOL (2) Bronze + Low-E 4 17 13 14 15 0.31 0.30 1.76 1.70 0.28 0.24 0.71
SOLARCOOL (2) Gray + Low-E 4 14 11 11 12 0.31 0.30 1.76 1.70 0.25 0.22 0.64
SOLARCOOL (2) GRAYLITE + Low-E 1 4 7 5 8 0.31 0.30 1.76 1.70 0.20 0.17 0.24
SUNGATE® 500 Low-E Glass
SUNGATE 500 (2) Clear 42 74 52 17 14 0.35 0.35 1.99 1.99 0.71 0.62 1.19
SUNGATE 500 (3) SOLEXIA 21 64 33 14 9 .035 0.35 1.99 1.99 0.51 0.45 1.42
SUNGATE 500 (3) ATLANTICA 11 56 25 12 7 0.35 0.35 1.99 1.99 0.41 0.35 1.60
SUNGATE 500 (3) CARIBIA 17 56 24 12 7 0.35 0.35 1.99 1.99 0.40 0.34 1.65
SUNGATE 500 (3) AZURIA 29 57 24 12 7 0.35 0.35 1.99 1.99 0.40 0.34 1.68
SUNGATE 500 (3) Bronze 18 44 33 9 9 0.35 0.35 1.99 1.99 0.53 0.46 0.96
SUNGATE 500 (3) Gray 17 37 28 8 8 0.35 0.35   1.99 1.99 0.47 0.40 0.93
SUNGATE 500 (3) OPTIGRAY 23 6 19 13 6 6 0.35 0.35 1.99 1.99 0.28 0.24 0.79
SUNGATE 500 (3) GRAYLITE 5 11 16 5 6 0.35 0.35 1.99 1.99 0.33 0.28 0.39
SOLARCOOL®Glass (Reflective) with SUNGATE 500 Low-E (3)
SOLARCOOL (2) SOLEXIA + Low-E 6 25 15 24 13 0.35 0.35 1.99 1.99 0.31 0.26 0.96
SOLARCOOL (2) CARIBIA + Low-E 5 22 10 19 10 0.35 0.35 1.99 1.99 0.24 0.21 1.05
SOLARCOOL (2) AZURIA + Low-E 8 22 10 20 10 0.35 0.35 1.99 1.99 0.23 0.20 1.10
SOLARCOOL (2) Bronze + Low-E 5 18 17 14 13 0.35 0.35 1.99 1.99 0.34 0.29 0.62
SOLARCOOL (2) Gray + Low-E 5 15 14 11 10 0.35 0.35 1.99 1.99 0.30 0.26 0.58
SOLARCOOL (2) GRAYLITE + Low-E 1 5 9 5 7 0.35 0.35 1.99 1.99 0.25 0.21 0.24

** Performance data is based on representative samples of factory production.
Actual values may vary slightly due to variations in the production process.

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*Azuria (formerly Azurlite®)
 Atlantica (formerly Solargreen®)
 Solexia (formerly Solex®)
    Footnotes 1-6

  1. Figures may vary due to manufacturing tolerances. All tabulated data are based on NFRC methodology using LBL's Window 5.2 software.  Variations from previously published data are due to minor changes in the LBL Window 5.2 software versus Version 4.1.

  2. Transmittance and reflectance values based on spectrophotometric measurements and energy distribution of solar radiation.

  3. U-value (K value) is the overall coefficient of heat transmittance or heat flow measured in BTU/hr. • ft2 • °F (watts/m2 • °C). Lower U-values indicate better insulating performance. Winter nighttime U-values are calculated using an outdoor air temperature of 0°F (-17.8 °C), indoor air temperature of 70°F (21°C), outdoor air velocity of 15 mph (6.7m/s), indoor air velocity of 0 mph (0 m/s) and solar intensity of 0 BTU/hour/square foot (0 w/m2). Summer daytime U-values are calculated using an outdoor air temperature of 89°F (32°C), indoor air temperature of 75°F (24°C), outdoor air velocity of 7.5 mph (3.4 m/s), indoor air velocity of 0 mph (0 m/s), and a solar intensity of 248 BTU/hour/square foot (783 w/m2).

  4. Shading coefficient is the ratio of the total amount of solar energy that passes through a glass relative to 1/8" (3.0mm) thick clear glass under the same design conditions. It includes both solar energy transmitted directly plus any absorbed solar energy re-radiated and convected. Lower shading coefficient values indicate better performance in reducing solar heat gain. Shading coefficients at outdoor temperature of 89°F (32°C), outdoor air velocity of 7.5 mph (3.4 m/s), indoor temperature of 75°F (24°C), indoor air velocity of 0 mph (0 m/s) and solar intensity of 248 BTU/hour/square foot (783 w/m2).  Note: Performance values were calculated using the LBL Window 5.2 program using NFRC 100-2001 standard winter and summer design condition.

  5. Solar heat gain coefficient represents the solar heat gain through the glass relative to the incident solar radiation. It is equal to 86% of the shading coefficient.

  6. Light to Solar Gain Ratio (LSG) is the ratio of visible light transmittance to solar heat gain coefficient.
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