There are 2 results, Your applied filters are, air flowrate 280m³ per hour (extraction); 240m³ per hour (recirculation), air flowrate ducted 463mâ³/hour, recirculated 320mâ³/hour, air flowrate 789 m³/h, air flowrate ducted 458mâ³/hour, recirculated 310mâ³/hour,