Blueair Classic 205 Review In 2022

The cheapest Classic air purifier that is Wi-Fi enabled, Blueair 205 might not have the strongest applicable area and airflow delivery, it is still very much a Blueair purifier that does not trim on any features compare with the higher range models. Based on the airflow delivery rate, applicable radius, noise level and electricity usage, does the price VS versatility worth considering over its higher range siblings? Hit on the hyperlink below to explore more on Blueair Classic 205 review.
online price (US)**
±349.99 $$$$$/ 7

(annual filter cost ±150-300)

** MRSP (Manufacturer's Suggested Retail Price)/ RSP (Retail selling price) is accurate at the time of posting.
^ Annual filter cost is calculated based on filter price and 12 hours of usage. Pricing could vary depending on air quality, usage frequency, and speed.
` The indicated online price guides as follows: $ = under $50, $$ = $50-100, $$$ = $101-200, $$$$ = 201-300, $$$$$ = $301-400, $$$$$$ = 401-500, $$$$$$$ = over $500.

Blueair 205 Specification

ProductBlueair 205
17 x 21 x 8 in
(43.2 x 53.3 x 20.3 cm)
Weight24 lb (10.9 kg)
Coverage (up to)280 sq. ft. (26 m2)
Airflow speed75 - 220 cfm (127 - 374 m3/h)
Dust free (CADR)200 cfm (340 m3/h)
Pollen free (CADR)200 cfm (340 m3/h)
Smoke free (CADR)180 cfm (306 m3/h)
Humidifying(H) speed
- Lifespan
- Replacement cost ($)
HEPA filter
- Lifespan
- Replacement cost ($)
Blueair Classic 200/300 Series Particle Filter
6 - 12 months
+- 49.95
Carbon filter
- Lifespan
- Replacement cost ($)
Blueair Classic 200/300 Series SmokeStop Filter
6 - 12 months
+- 99.95
Ionizer/ TechnologiesHEPASilent Technology
UV-light/ PCO
Other filter
All-in-one filter
- Lifespan
- Replacement cost ($)
Optional/ Addon
Noise level32 - 56 dB
Power usage level20 - 80 W
Timer/ SchedulerVia App
Auto mode
Air qualityAQ indicator
Filter change indicator
More color options
Wi-Fi/ BTBluetooth
Remote control
Child lock
Warranty5 years
Email/ Phone support

Key Features

  • 3-stage filtration with HEPASilent Technology
  • Wi-Fi supported (Blue Friend app/ Alexa)
  • Smartphone remote control (timer, fanspeed, LED light, night mode, child lock, tracking)
  • Electrostatic Particle charging (Ionizer)
  • 200/300 Series Particle Filter
  • 200/300 Series SmokeStop Filter
  • 3 fan speed
  • [OPTIONAL] Blueair Aware monitor
  • 5 years warranty

Design And Usability

Blueair 205 dimension
17 x 21 x 8 in
(43.2 x 53.3 x 20.3 cm)
Blueair 205 weight
24 lb (10.9 kg)

The smallest and lightest Wi-Fi ready air purifier in its Classic stable, Blueair 205 air purifier stands at 17 x 21 x 8 in size with 24 lb in weight. Made from galvanized steel that guarantees no chemicals off gassing unlike most plastic materials, Blueair Classic 205 has one of the best build quality around and is exceedingly durable. Best of all you can fully recycle the air purifier when it reaches its lifespan. As for mobility, Blueair 205 is still considerably bulky although it comes with side handles that would work even better if casters is included (optional purchase).

Like all Classic models, there are 2 ways of controlling the air purifier however we will focus on the second method later on. The first and most common way is using the main buttons via its top control panel. You can control the fan speed, connect to your Wi-Fi devices and check filter status. Each buttons comes with live LED display that will show the mode you are currently in. To further elaborate, let’s start with the fan speed button, 1 blue bar will light up if you are in first speed, 2 blue bar for second speed and so on. For the Wi-Fi button, the LED blue light will continue to blink if is ready to connect and stays blue if is connected. Finally for the filter button, LED icon will light up in grey + blue by default and change to orange when replacement filter is needed. To reset the filter button, simply hold the button for around 5 seconds.

Other standard features you would find include a 3-stage filtration with HEPASilent Technology, 3 speed, smartphone integration, filter replacement with no screws needed, filter replacement indicator, zero ozone emission, CARB certified, ENERGY STAR rated and 5 years warranty.

Blueair Friend app

As mentioned earlier, Blueair 205 is Wi-Fi ready where you could pair with your smartphone to operate the air purifier remotely. Available in both Android and iOS, first you have to download/ install Blueair Friend app on your mobile phone. Once everything is in order, you could adjust the fan speed, LED brightness intensity, setup timer, enable/ disable child lock, night mode and finally advanced scheduling for speed/ LED based on either hours or days. Other than that, you can keep track outdoor air quality in most major urban areas and few other miscellaneous AQ logs. If you have the optional Blueair Aware monitor, you can also enable Auto mode for autonomous operation and monitor room air quality based on your various indoor activities.

Airflow, Coverage, And CADR

Blueair 205 coverage
Purifying coverage
280 sq. ft. (26 m2)
Blueair 205 fanspeed

While both Blueair 405 and 605 has excellent purifying coverage, Blueair 205 on the other hand has a moderate purifying coverage catered for medium size room. At 280 sq. ft. applicable area (5 air charges per hour), Blueair Classic 205 would be best suited for bedroom or any room size that does not exceed the recommended coverage. The 3 speed 75 - 220 cfmairflow delivery is consistent with air coming in from bottom, back and side of the air purifier.

BrandPurifying CoverageFan Speed
Blue Pure Fan200 sq. ft.3
Medify Air MA-501,100 sq. ft.4
Coway Airmega 150214 sq. ft.3
Winix AM80230 sq. ft.4
Coway Airmega AP-1216L330 sq. ft.3
Alen BreatheSmart Flex700 sq. ft.4
Blueair 205 dust CADR
200 cfm (340 m3/h)
Blueair 205 pollen CADR
Pollen CADR
200 cfm (340 m3/h)
Blueair 205 smoke CADR
Smoke CADR
180 cfm (306 m3/h)
Moving on to the CADR, expect an average of dust clean air delivery rate at 200 cfm, pollen CADR also at 200 cfm and smoke CADR at 180 cfm. Decent return although far from the best which you could compare via the specification table above.

Filters And Performance

All Classic air purifier utilize the same HEPASilent technology that promises 99.97% efficiency filtration rate against particles as small as 0.1 micron. No exception here as it combines electrostatic and mechanical filtration where all incoming particles will be electrostatically charge. With all particles charged, pollutants like pollen, mold dust mites will be more clingy to the filters thus reducing the chances of these particles from getting away. Same theory would applied to the SmokeStop filter where it will focus on chemicals, smoke and odors instead. Additionally, The filters is designed in gradient structure and thermally bonded which further prevent particles from escaping even under heavy load circumstances. Another benefits of Blueair 205 filter is it uses natural anti-bacterial polypropylene fibers which is incidentally waterproof. Bacteria and mold would be inhibit from growth as these microorganism require water to thrive. Finally Blueair Classic 205 Smokestop would also slightly reduce surrounding ozone level by releasing cleaner and less ozone concentrated air.

Noise And Energy Usage

Blueair 205 noise level
Noise level
32 - 56 dB
Blueair 205 power consumption
Power consumption
20 - 80 W
Despite being the smallest Wi-Fi Classic air purifier, Blueair 205 noise level is similar at 32 - 56 dB. At low speed, it's perfectly silent without any fan noise while noise is clearly audible as you move up the level. Same pattern with the power consumption, power used is less than a light bulb at low speed while at around 20 - 80 W if you toggle between the speed during operation.
Noise TypeDecibels
Blueair 20532 - 56 dB
Breathing10 dB
Rustling leaves20 dB
Whispering/ Quiet library30 dB
Light rainfall40-50 dB
Conversation50-60 dB
Vacuum cleaner/ Hair dryer/ Washing machine65-80 dB
City traffic80-90 dB

Pricing And Maintainence Cost

Blueair 205 MRSP/ RSP
+- 349.99
Blueair 205 annual filter replacement cost
Annual Filter Cost
+- 150 - 300
^ Replacement filters/ estimated cost
Blueair classic 205 air purifier is the cheapest Wi-Fi ready air purifier in its Classic series however, there are many cheaper alternatives with wider purifying coverage that you could also considered. As for Blueair 205 filter replacement cost, both particle filters are considerably expensive but it is still the least expensive in the Classic range whether in 6 months’ time or 1 year. Like most Blueair Classic air purifier, you can purchase a Blueair Aware monitor to check surrounding air quality or enabled hidden Auto mode feature via Blue Friend app.

Blueair 205 VS The Challengers

Blueair Classic 405

Blueair 405

A worthy upgrade, top up more to enjoy stronger airflow, CADR and wider purifying coverage for large room size.
Medify Air MA-40 Air Purifier Review

Medify Air MA-40

Around the same price but comes with wider purifying coverage, higher CADR and cheaper annual filter replacement cost.

Final Thoughts On Blueair 205

Overall, Blueair 205 is an impressive air purifier with fine airflow delivery rate. Comparing the entire list of strong points/weak points, you should exclude the flaws that do not get in the way of the air purifier practicality.


  • Cheapest Wi-Fi ready Blueair Classic air purifier.
  • Unique HEPASilent Technology setup that electrostatically charge particles at initial stage.
  • Effective gradient structured style particle filter and SmokeStop Filter.
  • Durable galvanized steel body that does not off-gas chemicals.
  • Remote access to the air purifier via Blueair Friend app or link it with Amazon Alexa.
  • 5 years warranty.


  • CADR and purifying coverage is average at best.
  • Potentially high annual filter replacement cost on frequent use.
  • No pre-filter to deal with large particles like dust, hair.
  • Lacks air quality monitoring and Auto mode by default (Requires Blueair Aware monitor purchase).
Blueair Classic 205

Max Fernandez

A loving father and a dedicated reviewer for airfuji.com with more than 1000 air purifiers under his belt. Max Fernandez is also one of the million patients currently suffering from asthma. Feel free to nudge him if you have any questions.
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