62 Daylight modeling

Key contribution

Thanks to its variable tint and independent zone control, SageGlass contributes to balancing daylight levels under any weather condition while controlling glare, thus ensuring visual comfort without compromising energy performance.

Aim

To support circadian and psychological health by setting thresholds for indoor sunlight exposure.

Detailed requirement

Part 1: Healthy Sunlight Exposure

Lighting simulations demonstrate that the following conditions are expected:

Spatial daylight autonomy (sDA300,50%) is achieved for at least 55% of regularly occupied space. In other words, at least 55% of the space receives at least 300 lux [28 fc] of sunlight for at least 50% of operating hours each year.
Annual sunlight exposure (ASE1000,250) is achieved for no more than 10% of regularly occupied space. In other words, no more than 10% of the area can receive more than 1,000 lux [93 fc] for 250 hours each year.

See detailed requirement for Daylight modeling

Our contribution

Thanks to its variable tint and independent zone control, SageGlass contributes to balancing daylight levels under any weather condition while controlling glare, thus ensuring visual comfort without compromising energy performance. For instance, studies by independent engineering and sustainability consultancy firms Hilson Moran and Estia show that Sageglass is able to provide similar daylight autonomy levels as optimally controlled automated blinds systems, and considerably better performance than manually operated blinds.

Saint-Gobain North American HQ with SageGlass