Protect 7740i

Air Purifier, Large Rooms

Clean air for a healthier, happier space

Blueair’s most advanced filter, SmartFilter is designed to deliver superior performance. One particle filter layer and one active carbon filter layer combine to remove gas, odors, smoke, VOCs, exhaust, smog, and chemicals from the air. The two main filters are attached at the top, so when removing the filters you can just fold them over like a booklet to keep dust and pollutants from escaping. A smart RFID chip even tracks use and notifies you through the Blueair app when it is time to replace it, with a maximum 1 year lifetime.
Thoughtful features
Hidden wheels allow you to easily move the air purifier anywhere in the room, and the cord can be adjusted to the perfect length with a convenient winder.
Easy to clean pre-filter
Simple push-out cassettes trap large particles before they enter the air purifier, extending the life of the main filter.
Alexa compatible
Change settings, enable AUTO mode, and more from your smartphone via the Blueair app or connect with your Amazon Alexa enabled device for voice control.
Customize settings
Adjust air purifier settings like child lock, night mode schedule, LED brightness, and more to fit your lifestyle.
Room size (air changes per hour)
Completely filters room air in rooms up to 62 m² (4.8 air changes per hour) and up to 149 m² (2 air changes per hour). Blueair recommends 4.8 air changes per hour according to AHAM.

Additional Features

Speed control options 1 - 2 - 3 - Auto - Night
Integrated air sensors Yes

Why Choose Protect 7740i?

Quietly fill your room with more clean air

HEPASilent Ultra™ is our most advanced filtration technology ever. Every component is uniquely designed in Sweden to provide the maximum performance and energy efficiency. This patent-pending technology combines electrostatic and mechanical filtration to kill 99%² of germs and remove dust, pollen, dander, mold, VOCs, and odors. HEPASilent Ultra™ delivers 50% more clean air³, uses 55% less energy and has a 10% lower noise than traditional true HEPA filtration⁴.
24/7 protection against viruses and bacteria

Even when your air purifier is on standby, the patent-pending GermShield™ technology proactively monitors your room and kills⁶ viruses and bacteria on the filters using low air draft and plasma charging. A gentle stream of air then ensures no new growth of germs.
More clean air to every corner of the room

Unlike other air purifiers that only push clean air to a small part of the room, the patent-pending SpiralAir™ outlets are uniquely engineered to deliver 360°, omni-directional airflow - quickly circulating more clean air to every corner of the room - so you breathe clean air wherever you are.
Air quality numerical display

An intuitive 5-color indicator bar gives quick updates on particle and gas levels, and a numerical display quantifies the levels for PM1, PM2.5 and PM10 particles.
Designed with smart features

Designed with smart features like Clean air ETA⁸ and real-time pollutant tracking, you can be sure your air is always clean.

Your Cart

Protect 7740i

Why Choose Protect 7740i?

Quietly fill your room with more clean air

24/7 protection against viruses and bacteria

More clean air to every corner of the room

Air quality numerical display

Designed with smart features