The Q-SPL is a storm rated performance louvre is an aesthetically elegant high performance storm louvre. The blades which repel water back to the facade of the building provides a non vision appearence resulting in the supporting structure and internal area of the building being hidden from view.The fully engineered and tested system will not only perform excellently in storm conditions but will also provide excellent air flow with good physical free area and large unsupported spans.For ventilation system where weathering the building is of the upmost importance, the specially designed Q-SPL blade is installed with the blades vertical. This enhances the weatherability further (as well as providing a uniquely styled solution).Q-SPL – horizontalPitch = 56mmMinimum Performance Free Area = 52 %Minimum Visual Free Area = 72 %HVAC Class = A2Q-SPL – horizontalPitch = 56mm (vertically)Minimum Performance Free Area = 52%Minimum Visual Free Area = 72 %HVAC Class = A2