Blueair Classic 205 Review
Blueair 205 Specification
Product | Blueair 205 |
Dimension | 17 x 21 x 8 in (43.2 x 53.3 x 20.3 cm) |
Weight | 24 lb (10.9 kg) |
Fanspeed | 3 |
Coverage (up to) | 280 sq. ft. (26 m2) |
Airflow speed | 75 - 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) |
Filtration | 3-stage |
Pre-Filter - 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 ($) | Blueair Classic 200/300 Series SmokeStop Filter 6 - 12 months +- 99.95 |
Ionizer/ Technologies | HEPASilent Technology |
UV-light/ PCO | - |
Other filter | - |
All-in-one filter - Lifespan - Replacement cost ($) | - |
Optional/ Addon | - |
Noise level | 32 - 56 dB |
Power usage level | 20 - 80 W |
Timer/ Scheduler | Via App |
Sensors | |
Auto mode | |
Air qualityAQ indicator | |
Filter change indicator | |
More color options | |
Wi-Fi/ BTBluetooth | |
ENERGY STAR | |
Remote control | |
Child lock | |
Warranty | 5 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
Pros
- 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.
Cons
- 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).
The starters
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, speed, and CADR
What’s inside count
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.Keep it down
At what cost
^ Replacement filters/ estimated cost
Blueair 205 VS the challengers

Blueair 405
A worthy upgrade, top up more to enjoy stronger airflow, CADR and wider purifying coverage for large room size.