The 1201AB Airbricks bring robust ventilation to cavity sleeves and telescopic underfloor ventilators. The equivalent area marking on the front face is in line with BS EN 13141-1:2004, giving you peace of mind that the product complies with European standards. This airbrick is designed to allow unobstructed airflow while preventing the ingress of wind driven rain. Its integral clips mean multiple airbricks can be stacked together, creating sizes of 9 x 6 and 9 x 9. Ideal for use with the 1201 or 1201XL telescopic underfloor vents, the 1201AB Airbricks offer powerful and lasting ventilation through suspended ground floors, while they are invaluable alongside cavity sleeves in providing ventilation to building interiors. Invest in the 1201AB Airbricks to ensure your buildings/homes remain well-ventilated for years to come.