... 1,100m above sea level. Above 1,100m sea level windows with a pressure compensating valve need to be used. FrameMaterialDrawing /Data ... ,200 mmdouble sliding window 1,970 x 1,200 mmdouble window 1,970 x 1,200 mm windows with pass-through / speak-through 945 ... x 1,200 mm ISO LPCB ABS certification ...