Are you talking about replacements?
Yes. I reside in St. Louis, MO. I have been researching vinyl replacement windows for almost one year and "finally" decided to have Vanguard windows (.28 U-Factor) by Sunrise installed by the local Sunrise dealer. I need three (3) trapezoid windows and two (2) 2-Lite sliders. Their price for all five windows is $3000.00 (or $600.00 each). My brother who has worked in the construction trade for over 10 years (and is super handy!) ask that I research vinyl replacment windows that we could install ourselves. We are looking for the most energy efficient double-pane window (U-Factor .28 or better) we can find. We would appreciate any help we can get.