150 x 75mm 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 for the size of the vent. Flyscreen helps prevent the ingress of insects and spiders as well as reducing light and draughts. Embossed with DO NOT BLOCK. U.V. stabilised to slow down the effects of sunlight. Must not be used to supply combustion air to boilers, stoves and fires. *Please note: This item is a plastic component and therefore is not suitable for use within a) the external walls of buildings more than 11m high where people sleep on the premises (residential, institutional or hospitality) or b) external wall surfaces within 1m of the boundary if the building is 11m high or less, in England.
