The TSFL has exceptionally low noise characteristics for use within the classroom and is designed for use with fine dusts. Warm air is returned to the classroom being sympathetic to environmental issues. The Top Extraction Kit is available from Technology Supplies for installation by our engineers. Inlet sizes (left and/or right side: 1 x 100mm & 1 x 80mm diameter portsOR 2 x 80mm diameter portsOR 1 x 120mm port on one side only.Please specify inlet port diameters and saw model number at time of order placement.These products require specialist installation & training. Please contact us for further information.Airflow: Approx. 600m³/hr at 1000 pascals.