CASEMENT AND AWNING WINDOWS : GP331 - 4 1/2" (EV450M) Performance   Air tightness design pressure A3 (Maximum performance) Water tightness design pressure B7 (Maximum performance) Wind load resistance C5 (Maximum performance) Resistance to forced entry F20 (Maximum performance) Navigation : Windows > Casement and awning windows > Models > GP331 - 4 1/2" (EV450M) > Performance All Right Reserved - Roberge & Fils ©2002-2011 - Designed and programmed by Radium inc.