02-13-2012, 05:19 AM
when I bought this place, we had Aluminium frame windows, and you could hear and FEEL the wind blowing in the bedroom. Next thing I did was to order new windows. I cannot tell if it made a difference in the utility bill (I am sure it did, I just don't know how much), but it's quiet, no draft, and the windows are clear, not foggy. I would go ahead and replace. YMMV