Explanation of Properties:
Shading Coefficient: A ratio that describes the film/glazing performance over the entire solar spectrum. The lower the value the greater the films shading effect.
Visible Light Reflected: Percentage of visible light reflected from the film/glazing surface.
Visible Light Transmitted: Percentage of visible light allowed to pass through the film/glazing.
SHGC: Solar Heat Gain Coefficient: The fraction of incident solar radiation admitted through a window, both directly transmitted, and absorbed and subsequently released inward. The lower the value the better.
U-Value: Describes the amount of heat energy that is conducted through the film/glazing.
Heat Gain reduction: The percentage reduction of solar energy that is allowed through the filmed glazing when compared to the same unfilmed glazing system.
Heat Loss reduction: The percentage of heat energy that is prevented from conducting out through a filmed glazing system when compared to the same unfilmed glazing system.
Glare Reduction: The percentage reduction in glare of the filmed glazing when compared to the same unfilmed glazing. Related to visible light transmission.
UV Blocked: Percentage of the total UV (Ultra Violet) radiation blocked by film/glazing.
Total Solar Energy Rejected: The percentage of the total solar energy that the film/glazing blocks.
IR Rejection: Measured from 900-1100nm.
References:
ASTM E-308 Standard Recommendation Practice for Spectrophotometry and Description of Color in CIE 1931 system.
ASTM E-903 Standard Methods for Test for Solar Absorbance, reflectance and Transmittance of Materials Using Integrating Spheres.
The 1985 American Society for Heating , refrigeration and Air Conditioning Engineers (ASHRAE) Handbook of Fundamentals.
Window 4.0 A Computer tool for Analyzing Window Thermal Performance, Lawrence Berkeley Laboratory.
