National Fenestration Rating Council Incorporated ANSI/NFRC 200-2014: Procedure for determining fenestration product Solar Heat Gain Coefficient and Visible Light Transmittance at Normal Incidence. An American National Standard Issued by National Fenestration Rating Council, Inc.
The Ultimate Guide to Double Glazing
Double glazing is also known as double glazed unit, insulated glass unit, insulating glass. It is a type of glass pane that can be used