VERTICAL SLIDER WINDOWS : GP100-4 1/2" Performance     Air tightness design pressure A3/F (Maximum performance)   Water tightness design pressure B5   Wind load resistance C3   Resistance to forced entry F20 (Maximum performance)   Navigation : Windows > Vertical slider windows > Models > GP100-4 1/2" > Performance All Right Reserved - Roberge & Fils ©2003-2009 - Designed and programmed by Radium Inc.