ASTM WK46178

    Revision of G197 - 08(2012) Standard Table for Reference Solar Spectral Distributions: Direct and Diffuse on 20° Tilted and Vertical Surfaces

    (What is a Work Item?)

    Active Standard: G197 - 08(2012)

    Developed by Subcommittee: G03.09 | Committee G03 | Contact Staff Manager


    1. Rationale

    The National Fenestration Rating Council (NFRC) is now implementing plans to officially adopt G197 as a standard for window-related solar heat gain calculations. Its data would advantageously replace the current reference spectrum (from the deprecated ASTM E891) in such calculations.


    albedo; building; collector; daylight; diffuse radiation; direct radiation; fenestration; glazing; photovoltaic; reflectance; skylight; solar energy; solar spectral irradiance; terrestrial; transmittance; window;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:

    Technical Contact:
    Aron Habte

    Draft Under Development