Air purifiers

Classic 405



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Subscribe today and enjoy a 5% discount on all future filter orders, always free shipping, and other special offers. Simplify filter replacement and enjoy always clean air with four filter delivery options to fit your air purifier use. We recommend replacing your Blueair filter every 6 months for optimal performance.

The Wi-Fi enabled Blueair Classic 405 air purifier is just right for a medium-sized room that's up to 434 ft2 (40 m2). We are proud to say that it was rated Best in Test by the independent Nordic test institute Testfakta. The institute gives the Classic 405 the highest overall score for its superior air purification performance both at maximum speed and at the low noise setting (up to 37 db).

The Classic 405 is also recommended by the Swedish Asthma and Allergy Association* and is great for making sure that the air in living rooms, family rooms and large bedrooms is virtually free of allergy and asthma triggers.

A digital control panel with easy-to-read LED icons lets you check the status of your air purifier’s Wi-Fi connection, operating speed and filter at a glance. Touch controls make it easy to adjust settings. You can also download the Blueair Friend app and to control Classic 405 from any smart device, whether at home, at work or at play.

Add our Blueair Aware Air Quality Monitor and connect to the Blueair Friend app to confirm that the air is fresh, clean and energizing for everyone you love.

The Classic 405 delivers high performance thanks to HEPASilent™ technology, which combines electrostatic and mechanical filtration technologies. This combination, pioneered by Blueair delivers high Clean Air Delivery Rate (CADR) with whisper-silent operation and high energy efficiency. In fact, the Classic 405 works so quietly that you might have to check to make sure it’s switched on. And on its low setting, the Classic 405 uses about as much electricity as a light bulb.

*The test included air purifiers on the Nordic and UK markets. Read more on Testfaktas website."
Room Size
434 ft2
33 lbs
Air Changes
5 per hour
Yes (via Blueair Friend App)
Sound Level
32 - 52 dB(A)
Fan Speed
1 2 3
Area & Effect
Room size
434 ft2 (40 m2)
CADR (Smoke)
280 cfm (476 m³/h)
CADR (Dust)
300 cfm (510 m³/h)
CADR (Pollen)
300 cfm (510 m³/h)
Air changes per hour
Classic 405
Dimensions (H x W x D)
23 x 20 x 11 in (590 x 500 x 275 mm)
Product weight
33 lbs (15 kg)
Energy consumption
15 - 90 W
Sound level
32 - 52 dB(A)
Air outlet
Air inlet
Remote control
Yes (via Blueair Friend App)
On/off timer
Yes (via Blueair Friend App)
Filter replacement indicator
Speed control options
1 2 3
Wi-Fi connectivity
Compatible with 802.11 b/g/n router on 2.4GHz Wi-Fi Network band. Network security; open, WEP, WPA, & WPA2

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