If you’re a fan of Swedish brands (e.g., H&M, IKEA, Skype, Spotify…), then you’ll give Blueair a chance — that is, if you don’t love it already. Since its founding in 1996, Blueair has established itself as a force to be reckoned with when it comes to air purification systems. Now, it has at least 4 lines of air purifiers: Classic, Sense+, PRO, and Blue Pure.

Blueair 505 vs 605… Let’s compare two Blueair Classic air purifiers.

On one hand, there’s the Classic 505, a Wifi-enabled device designed to clean an area of up to 698 sq. ft. On the other is the Classic 605, a 31-lb. air purifier equipped with what the brand calls HEPASilent Technology.

Which of these two models should you choose? To help you with the answer, take a look at this comparison report.

Comparison Chart: Blueair 505 vs 605

Blueair Classic Air Purifier
Model Check Price » Blueair 505 Check Price » Blueair 605
Coverage Area 698 sq. ft. (65 sq. m.) 775 sq. ft. (72 sq. m.)
CADR (smoke, dust, pollen) 450, 400, 450 CFM 500, 500, 640 CFM
Air changes per hour 5 5
Dimensions (H x W x D) 660 x 500 x 340 mm (26 x 20 x 13 in) 660 x 500 x 340 mm (26 x 20 x 13 in)
Product weight 14 kg (31 lb) 14 kg (31 lb)
Energy consumption 15 – 100 watts 15 – 100 watts
Sound level 32 – 62 dB(A) 32 – 62 dB(A)
Remote control Yes, via Blueair Friend App Yes, via Blueair Friend App
On/off timer Yes, via Blueair Friend App Yes, via Blueair Friend App
Speed control options 1 – 2 – 3 1 – 2 – 3
Filter replacement indicator ✅ ✅
Casters ✅ ✅

Key Differences

Based on the chart presented above, when it comes to features, the Blueair 505 and 605 are no different.

For instance, they’re both equipped with HEPASilent Technology, a feature that combines mechanical and electrostatic to capture and eliminate airborne pollutants.

They’re also both Wifi-enabled, and are Alexa-compatible. Yes, with your Alexa device, you can command these Blueair air purifiers without having to set or program them yourself. Let’s not forget that there’s also a Blueair Friend app for added features.

Now, what’s the difference?

Coverage Area

Nope, it’s not the size, and neither is the weight. Both weigh 31 lbs. or 14 kg. They have casters, so don’t worry about transferring them from one room to another.

One of two areas in which the Blueair 505 and 605 differ in is their coverage area.

The Blueair Classic 505 is designed for medium to large rooms with an area of up to 698 sq. ft. (65 sq. m.). In comparison, the Blueair Classic 605 is ideal for larger rooms of up to 775 sq. ft. (72 sq. m.).


Another difference is their CADR rating. CADR stands for “Clean Air Delivery Rate,” a measurement of how effective an air purifier sucks in and eliminates airborne particles. In other words, it’s used to indicate the volume of dust, smoke, and pollen that are filtered by a device. In general, the higher the CADR number (usually designated in CFM), the better the air purifier.

Based on the data provided by Blueair, the Classic 605 has better CADR ratings.

Also read: Blueair Blue Pure 121 Review, Solution for Allergies?

Our Final Word: Blueair 505 vs 605

Which one should you get? Let’s end this Blueair 505 vs 605 right with our recommendation.

Both are effective in purifying the air to give you only clean air to breathe. Your choice is dependent on the size of your room. For larger rooms or living spaces, get the Blueair 605. If not, then stick to the Blueair 505.

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Best Air Purifier 2023

Best Air Purifier 2023