The cleanable circular grille housing is suitable for installation in all types of wall/ceiling depending on available ceiling void/wall depth and comes complete with locking slides. The square (160 x 160mm) and circular decorative grilles can be used in addition to any standard 125mm diameter valve. A Zehnder ComfoFresh filter can be used to remove particles. 383.5mm high x 174.5mm wide x 178.4mm deep, 300.3mm spigot length. For use with TVA designer grilles, 125mm diameter supply/extract valves and the ComfoValve Luna.