@drdawg, Ken, I am sorry, yes I do owe you the double glass panel specs.
I just came home and I pulled out my greenhouse folder from 2001.
Now I would have to go and compare what this means on Florian's website, but the description reads as follows:
All glass to be insulated heat repellent 4.7
Makes sense?
I just looked at the Florian Website, I am not sure how this translates to nowaday's description, but 14 years ago it was if I remember correctly, the second best available. We thought the triple pane was overkill and I was looking for enough light to grow sun loving Orchids, yet protect from high heat and cold.