Grille Housing TVA-P90, Connects 1 x ⌀ 125mm valve-1 x ⌀ 90mm Zehnder ComfoTube, Straight Adaptor, 160mm length. 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. 204.5mm long x 90-125mm diameter.