How can I increase the thermal properties of my Biltbest window glass?

How can I increase the thermal properties of my window glass?

In its simplest formula - a single pane of glass 1/8" reduces heat loss by about 90% vs,.. and open hole or window. For you R-value fanatics, by insulating the glass, we improve the R1 of single glass to a whopping R2 for insulated glass. When we add Low-E coatings, we can get about R3, and when we then add argon gas into the airspace between panes, about R4 is possible.