Laminated glass with embedded coating refers to laminated glass in which the coating is in direct contact with the interlayer.
The example below illustrates this configuration, where the low-e coating is located on surface #2 and is in contact with the interlayer.
As clearly documented in THERM 7 / WINDOW 7 NFRC Simulation Manual (page 8-111), the standard calculation method cannot be applied to this type of glass construction.
This is because when a coating is in direct contact with the interlayer, its performance can change compared to when it is exposed to air, and these changes are not fully reflected in the standard calculation models.
For laminated glass with embedded coatings, the most reliable approach to obtaining thermal and optical performance data is to fabricate representative samples and carry out physical measurements.
In practice, calculation methods are sometimes applied to estimate performance data for such glass configurations. However, due to the limitations noted in the NFRC documentation, results obtained in this way may not accurately represent actual performance.