Start with the room you use most. Note its floor area and ceiling height before choosing a device size.

Leave space around the device. A corner can work, but avoid wedging it between furniture or curtains.

Keep the controls reachable. A purifier placed behind a door becomes a small daily puzzle.

Think about how you move through the room. A clear walking route is useful in a bedroom, hall or living space.

Try the Room Planner with each room’s dimensions and a preferred mode. Its example values are a starting point for comparison.