This cleanable, rectangular CLD grille housing is suitable for installation in all types of wall/floor and ceiling void. The rectangular decorative grilles (300 x 200mm and 260 x 160mm) can be surface or flush mounted depending on preference. A Zehnder ComfoFresh filter can be used to remove particulates. 115mm high x 250mm wide x 171.5mm deep. For use with Zehnder CLD designer grilles.