Glazing Performance Comparison
1" Solarban 60 (2) Clear + Clear
Outboard: 1⁄4" Solarban 60 on Clear (#2 Surface)
Gap: 1⁄2" Spacer
Inboard: 1⁄4" Clear
1" Solarban 70 XL (2) + Clear
Outboard: 1⁄4" Solarban 70 XL Starphire (#2 Surface)
Gap: 1⁄2" Spacer
Inboard: 1⁄4" Clear
1" Solarban 67 (2) Clear + Clear
Outboard: 1⁄4" Solarban 67 on Clear (#2 Surface)
Gap: 1⁄2" Spacer
Inboard: 1⁄4" Clear
1" Solarban Z50 (2) + Clear
Outboard: 1⁄4" Solarban Z50 Optiblue (#2 Surface)
Gap: 1⁄2" Spacer
Inboard: 1⁄4" Clear
1" Solarban R100 (2) Clear + Clear
Outboard: 1⁄4" Solarban R100 on Clear (#2 Surface)
Gap: 1⁄2" Spacer
Inboard: 1⁄4" Clear
Fill: This column displays the fill of an insulating glass unit. There are three fill types used in this table: Argon; Air, represented by a dash ("-"); and for monolithic glass a blank is used to represent no fill is applicable.
Light to Solar Gain: The ratio of visible light transmittance and solar heat gain coefficient: VLT / SHGC.
Relative Heat Gain: The amount of heat gain through a glazing, uncluding the shading coefficient and U-value. Expressed in Btu / hr / ft2 (W/m2).
Shading Coefficient: The solar heat gain through a glazing relative to a lite of 1/8-inch (3mm) clear glass.
Solar Energy Reflectance: Percentage of solar energy that is reflected from a glazing.
Solar Energy Transmittance: Percentage of ultraviolet, visible and infrared light that is transmitted through a glazing.
Solar Heat Gain Coefficient: The ratio of the solar heat gain transmitted into a space through a glazing to the incident solar radiation.
Ultraviolet Transmittance: The percentage of ultraviolet light that is transmitted through a glazing.
U-Value: A measure of air-to-air heat transfer (loss or gain). Lower U-values indicate a reduction in heat transfer through a glazing. This is the reciprocal of R-value.
Visible Light Reflectance: Percentage of visible light that is reflected from a glass surface. Includes measurements for exterior and interior reflectance.
Visible Light Transmittance: The percentage of visible light that is transmitted through a glazing.
| VLT % | UV % | TSE % | R Vis Out % |
R Vis In % |
R Out TSE % |
U-Value Winter | U-Value Summer | U-Value Euro | RHG | SHGC | SC | LSG | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1" Solarban 60 (2) Clear + Clear | |||||||||||||
| 70 | 18 | 33 | 11 | 12 | 29 | 0.29 | 0.27 | 1.65 | 92 | 0.38 | 0.44 | 1.84 | |
| 1" Solarban 70 XL (2) + Clear | |||||||||||||
| 64 | 6 | 24 | 12 | 13 | 52 | 0.28 | 0.26 | 1.62 | 67 | 0.28 | 0.32 | 2.32 | |
| 1" Solarban 67 (2) Clear + Clear | |||||||||||||
| 54 | 11 | 24 | 19 | 16 | 34 | 0.29 | 0.27 | 1.65 | 71 | 0.29 | 0.34 | 1.84 | |
| 1" Solarban Z50 (2) + Clear | |||||||||||||
| 51 | 14 | 25 | 8 | 11 | 23 | 0.29 | 0.27 | 1.65 | 77 | 0.32 | 0.36 | 1.60 | |
| 1" Solarban R100 (2) Clear + Clear | |||||||||||||
| 41 | 11 | 19 | 32 | 13 | 41 | 0.29 | 0.27 | 1.65 | 57 | 0.23 | 0.27 | 1.78 | |
Note: Performance data calculations in this table are based on the International Glazing Database (IGDB) Version 28.0. Learn more about IGDB.
* Some glass types in this table may not be stocked. Contact ITI Glass for availablity.
- VLT % - Visible Light Transmittance
- UV % - Ultra-Violet Transmittance
- TSE % - Total Solar Energy Transmittance
- R Vis Out % - Reflected Visible -- Exterior
- R Vis In % - Reflected Visible Light -- Interior
- R Out TSE % - Total Solar Energy Reflectance -- Exterior
- U-Value Winter, Summer - Btu/(hr x sqft x F)
- U-Value Euro - European U-Value
- RHG - Relative Heat Gain, Btu/(hr x sqft)
- SHGC - Solar Heat Gain Coefficient
- SC - Shading Coefficient
- LSG - Light to Solar Gain
Fill: This column displays the fill of an insulating glass unit. There are three fill types used in this table: Argon; Air, represented by a dash ("-"); and for monolithic glass a blank is used to represent no fill is applicable.
Light to Solar Gain: The ratio of visible light transmittance and solar heat gain coefficient: VLT / SHGC.
Relative Heat Gain: The amount of heat gain through a glazing, uncluding the shading coefficient and U-value. Expressed in Btu / hr / ft2 (W/m2).
Shading Coefficient: The solar heat gain through a glazing relative to a lite of 1/8-inch (3mm) clear glass.
Solar Energy Reflectance: Percentage of solar energy that is reflected from a glazing.
Solar Energy Transmittance: Percentage of ultraviolet, visible and infrared light that is transmitted through a glazing.
Solar Heat Gain Coefficient: The ratio of the solar heat gain transmitted into a space through a glazing to the incident solar radiation.
Ultraviolet Transmittance: The percentage of ultraviolet light that is transmitted through a glazing.
U-Value: A measure of air-to-air heat transfer (loss or gain). Lower U-values indicate a reduction in heat transfer through a glazing. This is the reciprocal of R-value.
Visible Light Reflectance: Percentage of visible light that is reflected from a glass surface. Includes measurements for exterior and interior reflectance.
Visible Light Transmittance: The percentage of visible light that is transmitted through a glazing.