I was unaware of how polluted indoor air could be and decided to check our an air purifier for the flat. Blueair offered its Classic 405 air purifier, allowing me to clean the air by the kitchen and the living room.

I am in love the look of this air purifier. The size of it is big but will fit into any decor. This is down to the narrow shape, allowing it to go into different spots. Though the manual states exactly how it should be placed allowing air to flow around it. The wifi features allow me to install the Blueair app, so I can schedule when the Classic 405 will go into overdrive or quiet. So it won’t keep us up at night. The app will also keep you up to date with the life span of the filter, letting me know when to buy a new one.

The air quality in the living room was improved while running the air purifier. Removing 99.97% of air particles as small as .3 microns, and with a 360-degree filter, it’s cleaning the air from every direction. I also had to check a couple of times if it was working as it runs silently. It also has a timer with auto shut off at the ends of a cycle. You can also increase how hard it runs if needed, or you can leave it on auto and this thing will check the air and run harder if needed.
Blueair Classic 405 Air Purifier Specs
Room size | 40m2 (434 sq ft)?Room size is based on 8′ ceiling. If your ceilings are higher, the air purifier will still clean your air but at a slightly lower CADR. |
CADR (Smoke) | 476m3 per hour (280 cfm) |
CADR (Dust) | 510m3 per hour (300 cfm) |
CADR (Pollen) | 510m3 per hour (300 cfm) |
Air changes per hour | 5 |
Dimensions (H x W x D) | 590 x 500 x 275 mm (23 x 20 x 11 in) |
Product weight | 15 kg (33 lb) |
Energy consumption | 15 – 90 watts |
Sound level | 32 – 52 dB(A) |
Integrated air sensors | No |
Remote control | Yes (via Blueair Friend App) |
On/off timer | Yes (via Blueair Friend App) |
Filter replacement indicator | Yes |
Speed control options | 1 – 2 – 3 |
Casters | Optional |
Air outlet | Side |
Air inlet | Side |
Wi-Fi connectivity | Compatible with 802.11 b/g/n router on 2.4GHz Wi-Fi Network band. Network security; open, WEP, WPA, & WPA2 |

The filter can be slipped out easily and uses a nice little door mechanism. You can buy the simple filters or ones specifically for smokers, which will be one I will have to get for next time.
This is a must have for any large house/flat. It can run in the background and clears the air in the room and also leaves a lovely smell running through it. Finally, check out our other lifestyle reviews.
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