Happy New Year!!!

SOLAR HEAT GAIN CO-EFFICIENT IS IMPORTANT WHILE SELECTING A WINDOW TINT! 

I was quite busy in last few days. I was researching some new technologies in tinting world. I like the article "Statements of Infrared Rejection may Confuse Customers published by AIMCAL-Window Film Committee." This is the article at International Window Film Association.

Some countries several manufacturers list fake reports of Infrared Rejection percentage to promote their products. But in U.S. market, where the Solar Heat Gain Co-efficient (SHGC) is exists. The use of IR rejection values are not necessary. The effect of Infrared Rejection depends on which wavelengths are rejected and there is no standard set determining which wavelengths are meant by an IR rejection percentage. Accordingly IR rejection percentage does not offer a complete picture of Solar Heat Control.

Below is the diagram of Solar Energy Distribution. SHGC predicts the heat gain of the total contribution of all three spectral regions of Solar Light. UV, Visible Light and Near Infrared Radiation. Thus SHGC provides only valid evaluation of total solar heat gain of a fenestration product.

Most of the distributor and supplier of window tint do not even know about this fact. But Mr. Phillip Hollocher who owns a Solar Control Films has very good knowledge about solar control films. You can contact him through their website solarcontrolfilmsinc.com for more information. Some other tint suppliers also provide good information regarding IR rejection and SHGC.

I hope this post is helpful for you and you are most welcome to post your comments and suggestions.

Have a healthy year!