Like laminated glass, toughened glass doesn’t typically carry a specific energy rating unless it’s part of a double-glazed or Low-E unit. However, it does not have inherent insulating properties beyond safety and impact resistance.

‍

How to Know:

Check if the toughened glass is integrated into an insulated glazing unit (IGU) for energy performance. If so, you can determine the energy rating based on the U-value of the unit.