How large a room can it clean?

Blueair rates it at 705 sq ft cleaned in 12.5 minutes and up to 3,385 sq ft in one hour. Real-world results depend on ceiling height, furniture and how dirty the air is.

What filters does it use?

It ships with one Fog pre-filter and one Particle & Carbon filter. The seven-stage stack combines mechanical particle capture with carbon for odors.

Does it remove odors or only particles?

Both. The particle filter handles dust, pollen and smoke, while OdorFence carbon layers target smells from cooking, pets and smoke.

Do I need the app to use it?

No. You can run it from the onboard controls and auto mode. The Blueair app adds scheduling, remote control and air-quality history.

How often do filters need changing?

Blueair says the filter design doubles filter lifetime compared with its earlier models. Actual intervals depend on run hours and air quality; the app tracks filter life.