Glass facade & windows by Saint-Gobain

See below how Glass façade & windows by Saint-Gobain can contribute to WELL V1 criteria: Thermal Comfort.

Read more

You have a question? You are looking for a documentation? You need more information?

Don't hesitate to contact our team, we will be pleased to help you.

Contact us!

Key contribution

In line with its commitment to optimizing energy efficiency, Saint-Gobain Glass offers a complete and diverse range of high performance solar control and low-emissivity glazing, made from sustainable materials, that ensures comfortable indoor temperatures under all conditions. 


To promote occupant productivity and ensure a sufficient level of thermal comfort.

Detailed requirement

Part 1: Ventilated Thermal Environment

All spaces in mechanically-ventilated projects meet the design, operating and performance criteria:

  • ASHRAE Standard 552013 Section 5.3, Standard Comfort Zone Compliance.

Part 2: Natural Thermal Adaptation

All spaces in naturally-ventilated projects meet the following criteria:

  • ASHRAE Standard 552013 Section 5.4, Adaptive Comfort Model.

See detailed requirement for Thermal comfort

Our contribution

Two glazing characteristics are key with regard to thermal comfort:

  • The thermal insulation of the glass (also known as the “Ug value”) that represents the heat loss; and 
  • The solar factor (also called the “g value”) that corresponds to the percentage of total solar radiant heat energy transmitted through the glazing.

Depending on the outdoor conditions and customer preferences, the glazing configuration will not be the same. For instance, for heating dominant climates, a high performance insulation glass will provide an excellent Ug value while reducing heat losses to a minimum.
Nevertheless, for mainly cooling dominant climates, selectivity also has to be considered. Selectivity is defined as the light transmission percentage divided by the g value (LT/g) and corresponds to how effective the glazing is at blocking heat but letting in sunlight.

Our glass for facades and windows offer three options for optimal thermal comfort:

  • Optimized thermal insulation: this corresponds to the good match between the thermal insulation (Ug value) and the solar factor according to the context of use of the glazing (i.e. the geometry and geographical localization of the building, the window size and orientation, and customer preferences). Below you will find some examples of our glazing configurations:




  • Active solution: our EGLAS glass is recommended for extreme weather conditions in particular. It is an integrated and invisible heating glass solution that can additionally contribute to indoor thermal comfort by controlling radiant heat.
  • Better spacer: we can also limit heat loss by using a better spacer when glass is mounted in a double or triple glazing format. For instance, Swisspacer® is a performing, warm edge spacer bar that improves the Ug value (noted Uw for a window) for better insulation.