This will depend on the size of the room/space that you wish to use the unit in.
As a guide, divide 600m³ (the maximum clean air delivery rate) by the room volume in m³ (in metres, the length x width, then x this by the height).
For example, a room measuring L 3m, W 2m, H 6m = 36m³ - this would provide 16 air changes per hour.
You can use our interactive calculator on our website - https://gamahealthcare.com/rediair