The bigger the room, the longer the machine will take to purify it as there is more air in the room.

In maximum setting. Tested for air projection, purification coverage in an 81m³ room and heating performance in a 35m³ room.

In a smaller room, it will take less time to purify the air; in a bigger room, it will take longer to purify the air.

Watch our How our engineers test the Dyson Pure Cool purifying fan video below and learn how Dyson developed the POLAR test, based on a large living room size, with no added fan.