These air purifiers are suitable for spaces between 31 and 70m2. With these air purifiers, you can purify the air in medium-sized to large spaces. That's useful if you place it in the living room or office, for example. This way, you're less bothered by dust, pollen, and fine dust. You can choose from multiple purifiers. Like a Philips air purifier with an app or a Dyson with heating function, for example.