Rytons Louvre Ventilators 9″ x 3″ – Low profile fixed open louvres with high air flow suitable for room and cupboard ventilators. Embosses with DO NOT BLOCK. For internal and external use. With flyscreen. Made from high impact polystyrene – U.V. stabilised to prevent sun caused degradation 271mm Long x 95mm High F30 Accessories/Sundry Items for Brick/Block/Stone Walling: Specification clauses 16, 165 U90 General Ventilation – Domestic: Specification clauses 36, 38, 61, 62, 360, 380, 505, 510
