Glazing efficiency explained

We need a topic called 'Glazing" so discussions can be directed to this topic  specifically

Encouraged by these ideas being put into practice.  
Thanks John, I will now move away from my often used 'hillbilly tech'   I was tired of fogged windows and the inevitable repairs... so made my own system with a glorified storm window by hand, with a 1 to 2 inch air space created.  Too time consuming in general, I will look for his innovative windows instead

It is an amazing system, and his explanation of how the glass is made is fascinating.
There is a local supplier near me and now I better understand it I will approach them again.