Does your window have a U value
The U value, will be identified on NRcan label. The [...]
Does your window have an ER value
ER value demonstrates the over all performance of a window [...]
Where does your insulated glass come from?
Window Seal has been insulating our own glass since 1991. [...]
What spacer are you using?
Window Seal uses the highest quality warm edge spacer available, [...]