The Helios Fans ZAV 80 is a compact and versatile air valve made from durable polymer, suitable for installation on walls or ceilings. For wall-mounted use, it features an adjustable front grille, while ceiling installations utilise a closed front grille with an open aperture ring. Designed for both intake and extract air applications, this valve offers flexible performance in various ventilation systems, ensuring effective airflow regulation in residential or light commercial settings.