• Over frame acoustic ventilator suitable for high level Elevations
• Can fit onto windows or doors with a depth between 50-194mm
• Self Regulating
• Equivalent area 12725 mm2/m
• 43 Dnew Acoustic performance in the open position
• Available as face fixed or adapted glazed in
• Larger Chevron blades
• 34mm Blade Pitch
• 50% physical free area
• Available as face fixed or adapted glazed in
• Small chevron blades
• 20mm Blade Pitch
• 30% physical free area