"Adjustable ventilator to provide ventilation beneath suspended ground floors up to 5 brick courses. Telescopic and adjustable for a step of 3, 4 or 5 brick courses Free area of 8000mm2 per unit when installed without 1201AB airbrick Free area of 6500mm2 per unit when installed with 1201AB airbrick Equivalent area of 6170mm2 per unit when installed with 1201AB airbrick Special grille included to prevent entry of vermin Satisfies all NHBC requirements Manufactured to BS EN ISO 9001 and BS EN ISO 14001 Complies with all relevant Building Regulations Meets all relevant British Standards"
"Fits on to the lower rear opening of the telescopic underfloor ventilator to allow a standard 110mm external diameter plastic underground drainage pipe to be connected via a coupling connection. Does not restrict airflow through the main telescopic underfloor ventilator Purpose-made accessories eliminate the need for on-site modifications Lightweight and easy to handle Durable and totally resistant to decay Satisfies all NHBC requirements Manufactured to BS EN ISO 9001 and BS EN ISO 14001 Complies with all relevant Building Regulations Meets all relevant British Standards"
"Fits between the upper and lower parts of the telescopic underfloor ventilator to accommodate a vertical step of 6 to 7 brick courses. Does not restrict airflow through the main telescopic underfloor ventilator Purpose-made accessories eliminate the need for on-site modifications Lightweight and easy to handle Durable and totally resistant to decay Satisfies all NHBC requirements Manufactured to BS EN ISO 9001 and BS EN ISO 14001 Complies with all relevant Building Regulations Meets all relevant British Standards"
"Fits between the airbrick and upper front opening of the telescopic underfloor ventilator to accommodate external walls of more than 102.5mm thickness, up to a maximum of 215mm Does not restrict airflow through the main telescopic underfloor ventilator Purpose-made accessories eliminate the need for on-site modifications Lightweight and easy to handle Durable and totally resistant to decay Satisfies all NHBC requirements Manufactured to BS EN ISO 9001 and BS EN ISO 14001 Complies with all relevant Building Regulations Meets all relevant British Standards"