[Hugh R]

Gotta agree on the energy savings, but the noise and the drafts pushed me to replace the windows on the North side of my house which faces a freeway 1/2 mile away. In my home office where I am now, I used to hear the freeway and now its quiet. The first night I installed a double pane window in my daughter's room she said she was able to sleep without her head getting cold (head of bed up against window). Also the new windows slide open versus having to force the old ones open and closed.