Is there such a thing as Quadriple insulated windows?

[Bob Weisner]

HI:


I remember watching one of the This Old House shows and I recall them showing a window that they were going to install in a house that they were remodeling. It was made somewhere over in Europe and the window was made of 4 layers or panes of glass. Has anyone seen this type of window?

[Larry Cooke]

Bob,

I haven't actually seen one in person but here's a link to look at:

http://www.henselstone.com/default.asp?P=2&S=2

Here's another one to look at:

http://www.commercialwindows.umn.edu/materials_glazing1.php

Larry