ASHRAE Technical Committee 4.5 - Fenestration
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TC 4.5 is concerned with the identification and evaluation
of all physical properties of:
1) Glasses and other glazing materials,
2) Shading and shielding materials and devices, and
3) Control devices and strategies
which influence the radiant, conduction, and convection transfer of both
heat and light through fenestration systems.
It is also concerned with the development of procedures
for calculating and measuring solar heat gain, daylight admission, and
heat transfer through fenestration systems.