ThermaCel Window Systems by Billy Ellis- Insulating Gas

The gas that fills the space between the windows is the final component.  There are two gases used in windows:  Argon and Krypton.
Argon is approximately 5 times heavier than air.  Krypton is more than twice the weight of Argon, and substantially more expensive (more than 100 times the price of Argon). The heavier the gas, the better the insulating value of the window.
Although many manufacturers use the same gases, the most important aspects to the gas between the glass are: 1) how much gas is in there? And 2) how do I know there is gas in there at all?

The first question is important, because more gas equals more insulation and better energy performance.  Gas fill may be as low as 65% in some windows.  For a window to be certified, the window must achieve greater than 90% fill and lose less than 1% of the gas per year. Our window system achieves 94%+ fill rates, and retain their gas, due to the duralite spacer being impermeable to gas and water vapor.  This means the water stays out, and the gas stays in.

Question 2: how do I know there is gas in there at all? This is a scarier question. People spend tens of thousands of dollars on beautiful, brand new windows without ever being provided a way to know if there is really anything between the glass other than air.  We are different.  Whether you choose an all-Argon, all-Krypton, or hybrid window system, the ThermaCel window system by Billy Ellis comes with ThermalCert verification.  The Optigas filling system and ThermalCert verification system we use won the 2011 Crystal Achievement Award for the most innovative solution in the industry.
The system takes thermal measurements after the gas is inserted in the window, and will stop production if results are not acceptable.  
Then, the results are printed and the ThermalCert verification sticker is affixed to the tested window(s).

So what are the results of the best frame system ever conceived, the best spacer on earth, the best glass ever made, and a certification system that proves scientifically that you got every single benefit you were promised?  The most energy efficient window anywhere.  The ThermaCel Window System by Billy Ellis achieves R6 and R7 ratings, depending upon the configuration, and whether Argon or Krypton are used, which are the highest ratings achievable in windows, and at least twice the standards established for EnergyStar 2010 ratings.  
The ThermaCel Window System by Billy Ellis provides the best energy performance available, in a beautiful, lifetime, ultra-quiet window that will not only save you thousands in energy costs, but will increase the enjoyment of your home.