| 1. PURPOSE
This test method specifies the methodologies for determining the solar optical properties of
glazing materials and systems. This test method is issued under the fixed designation NFRC
300; the number following the designation indicates the year of original adoption or, in the
case or revision, the year of last revision.
2. SCOPE
This test method covers the determination by measurement and calculation of the optical
properties relevant to energy transfer in flat specular glazing materials.
This test method includes the calculation of various properties, which can be derived from
the spectral measurements, including spectrally averaged transmittance and reflectance
quantities.
This test method includes the calculation procedures necessary to determine the net optical
properties of combinations of discrete glazing elements. | 