Bottom hung open out AOV’s are most commonly utilised to exhaust smoke to atmosphere as they create a natural smoke path in the direction of exhaust aligned to best practice. The AOV’s are often located within the vertical upstand of an atrium or at high level as part of a natural intake/extract natural smoke ventilation system. Their performance is measured as aerodynamic free area (Aa) with quantities calculated in accordance with the fire strategy.
Side hung open out AOV’s utilised to exhaust smoke to atmosphere. The AOV’s are often located within the vertical upstand of an atrium or at high level as part of a natural intake/extract natural smoke ventilation system. Their performance is measured as aerodynamic free area (Aa) with quantities calculated in accordance with the fire strategy.
Top hung open out smoke extract AOV’s are utilised within the vertical upstand of an atria application to naturally exhaust smoke when the AOV is positioned above or within the smoke layer therefore smoke will exhaust before it drops to the safe escape layer. This is common when the AOV’s are utilised for environmental ventilation to prevent rain ingress however negative smoke discharge must be considered and it is recommended to gain approval of this solution as bottom and side hung orientations are preferred. Their performance is measured as aerodynamic free area (Aa) with quantities calculated in accordance with the fire strategy.
Top hung open out AOV’s (SHEV’s) are utilised at low level within natural and mechanical atrium smoke extract systems to provide inlet/replacement air. Top hung open out provides an optimum path for air intake as opposed to bottom hung open out for smoke exhaust.
Side hung open out AOV’s are utilised at low level within natural and mechanical atrium smoke extract systems to provide inlet/replacement air. The glazing mullion modules and free area requirements determine if a top hung or side hung solution is optimum.
Top Hung inclined AOV’s (SHEV’s) are utilised to naturally exhaust smoke from an atria when the SHEV is positioned above or within the smoke layer therefore the smoke will exhaust before it drops to the safe escape layer. This is common when the AOV’s are utilised for environmental ventilation to prevent rain ingress however negative smoke discharge must be considered. In larger atria applications inclined SHEV’s are utilised as both intake and extract AOV’s.
Bottom Hung inclined AOV’s (SHEV’s) are utilised to naturally exhaust smoke to atmosphere from an atria. In larger atria applications inclined SHEV’s are utilised as both intake and extract AOV’s.
The SHEVTEC glazed louvre is tested to EN121001-2 with an aerodynamic free area of 1.0 s for an end of corridor AOV application. It is important to consider the overall performance of the façade including U value and weather performance as this product is often glazed into the façade system.