[Eye of Unk]

That size of glass is at least double paned and filled with an inert gas. And its not uncommon to install triple pane.

I have a double pane e-rated window thats supposed to be pretty efficient and yet I can still feel the cold through it so I would think for that size of a window they may be triple.

All my house has double paned windows, the very high quality ones are drawn down to a vacuum and they add a dry inert gas so as to prevent fogging, and yes they are expensive.

[hoosiermama]

We have e-glass (double pane with gas added) on our windows here too. But as you say can still feel the cold. I've added some of the honeycomb window shades (expensive too) and that has helped. We have no windows on the north side and large windows on the south to let light(heat?) in.

Was just wondering if there was something more efficient. No triple panes here.

Regardless she has a beautiful view in the summer....Maybe they have a way of insulating more in the winter.

Thanks for the information.