Telescopic Underfloor Ventilator is suitable for using to provide an airflow passage to the void underneath a suspended floor. It features a telescopic vertical channel to enable the vent to be adjusted between three and five brick courses. For the greatest level of airflow, the ventilator is designed to be used with a Manthorpe airbrick. It features a rodent grille at the back of the vent to prevent the entry of rodents and any unwanted building debris that could cause blockages.