Article | REF: N4408 V1

Insulating glazing: light and energy

Author: Michel CHAUNAC

Publication date: February 10, 2014, Review date: April 26, 2023

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3. What is the solar factor

The solar factor of a glazing unit is the ratio of the total energy entering a room to the incident solar energy.

The total energy is the sum of the energy transmitted directly and the energy re-emitted towards the interior following the heating of the inner wall by energy absorption (figure 4 ).

Solar factor: sum of transmitted and re-emitted fluxes
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