With the Philips 4000i Series AC4236/10, you can clean the air in large rooms up to 122m2. Thanks to the automatic mode, you always have clean air in your home. The air purifier measures the air quality 1000 times per second. It automatically works harder when it measures pollution. You can connect the product to the Philips Air+ app. You can control the purifier remotely via the app or when you're not home. You can also see information about the air quality here. Thanks to the silent night mode, you can use the product in the bedroom. It also has an allergy sleep mode. This way, you' re less likely to be bothered by allergies when you sleep.