The center of glass thermal performance of an IGU is a function of glass type, coating, and size and gas fill of cavity gap. This document will address these areas only and does not address IGU edge conditions.

 

The Technical Services Division of the National Glass Association (NGA) has produced this Glass Technical Paper solely for informational purposes. This Paper was developed by dedicated member volunteers and subject matter experts. The original version of this document was approved and published in 2016. This version of the Paper was updated and published in July 2022. All purchases will be electronically accessed or delivered.