I thought this might interest some here.
Quad in the title is quoted because one of the options includes 2 outer glass panes and 2 inner layers of suspended film.
It still offers only a 25% improvement over dual pane systems which is not a lot considering the low R starting point.
Quad in the title is quoted because one of the options includes 2 outer glass panes and 2 inner layers of suspended film.
It still offers only a 25% improvement over dual pane systems which is not a lot considering the low R starting point.