225 x 225mm White Louvre Vent Plastic louvre grille with detachable flyscreen. Suitable for internal and external use. Low profile fixed open louvres allow a high air flow. Flyscreen helps prevent the ingress of insects and spiders as well as reducing light and draughts. Embossed with DO NOT BLOCK. Compatible with Rytons 9×9 AirLiner® cavity liners. U.V. stabilised to slow down the effects of sunlight. Louvre ventilators with flyscreens must not be used to supply combustion and cooling air to boilers, stoves and fires.
