This Philips PureProtect air purifier's powerful filtration can handle large spaces up to 135 m². It will even clean a 20 m² room in less than 6 minutes - perfect at home or the office. Its three-layer HEPA filtration captures 99.97% of particles down to 0.3 microns in size. That's smaller than the smallest known virus! And its SilentWings technology is inspired by the silent flight of owls. It runs quieter than a normal conversation, even on full power. That means it won't distract you from your work or evening in front of the tele. Good to know- It captures 99.99% of allergens including dust mites, pollen, pet and mold spores- The active carbon layer traps and removes nasty pongs to keep your home smelling fresh- It removes 99.99% of airborne viruses and bacteria including Influenza and COVID-19- AeraSense technology scans the air 1000 times a second and shows the results in real time- Download the Air+ app to track the air quality and control it remotely from your phone. Enjoy clean, safe air at home, now 50% quieter! Our double-fan design packs more power in a compact form, to purify even large spaces in minutes. With its sleek design, low energy use and smart app control, it fits perfectly into your home. LARGE COVERAGE UP TO 135 m²: with CADR 520 m³/h, it can purify 20 m2 in less than 6 min. 3-LAYER HEPA FILTRATION: Captures 99.97% of particles up to 0.003 microns – to protect from pollen, dust, dust mites, pet dander, smog or gases. Removes 99.9% of airborne viruses and bacteria. CERTIFIED FOR ALLERGY SUFFERERS by ECARF, the purifier removes 99.99% of pollen, dust mite or pet allergens - known triggers of allergy or hay fever symptoms. 50% QUIETER with SilentWings technology. Inspired by the silent flight of owls, our fan-blade design ensures purification as quiet as 15 dB(A). Even at maximum speed, it’s quieter than normal conversation. LOW ENERGY USE: At maximum power, the air purifier uses only 36W, less energy than a traditional light bulb.