Blueair 203 Air Purifier

Our Expert Rating:

The Blueair 203 air purifier is discontinued. As an alternative we recommend the Blueair Classic 205 Air Purifier. Filters available for purchase below.

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Blueair's compact 203 air purifiers are ideal for smaller sized bedrooms and offices up to 581 sq. ft. Featuring HEPASilent technology and environmentally friendly filters, the Blueair 203 is able to deliver more clean air at a faster rate with less noise. Its 3 speeds are very quiet and on the lowest speed you can barely tell it is on. It is energy star qualified and uses only 20 watts on low and 80 watts on high speed. Blueair air purifiers are made for continuous use 24/7. Their Swedish design is not only attractive but built to last for years.

See the entire family of Blueair Air Purifiers.

  • For general indoor air pollution control including pollen grains, house dust mites, mold spores, and pet dander in a small bedroom or office
  • Maximum room coverage: 581 sq. ft (2 air changes/hr)
  • Recommended room coverage: 240 sq. ft (5 air changes/hr)
  • Award winning Swedish design
  • HEPASilentâ„¢ Filtration technology
  • Includes 1 HEPASilent particle filter of polypropylene
  • Captures 99.97% of all particles down to 0.1 microns
  • Internal ionizer
  • Zero ozone emission
  • 3 fan speeds
  • Near silent operation: 32-56 dB(A)
  • Manual controls
  • Air inflow through back, outflow through top
  • Built-in handles
  • Energy Star qualified
  • CARB certified
  • Color: White with dark grey
  • Galvanized steel housing with powder coated finish
  • Assembled in the China

Filter Change Indicator

The Blueair 200 Series Air Purifiers intake air through the back of the unit. The air is passed through the pre-filter where large particles are trapped, then through the electrostatic HEPA-type filter where the small particles are trapped, and then through the ionization chamber where the air mixes with negative ions. Negative ions are then released with the clean air through the top of the unit. The ions collide with the particles in the room air and the particles become charged. Then when the air cycles back through the unit, the charged particles cling to the electrostatic filter media. The combined filtration technologies allow the Blueair Air Purifiers to achieve 99.97% filtration efficiency. Blueair Model 301, 402 Air Purifiers Diagram
Click to enlarge
1. Airborne Particulate Filtration
2. Gas, Chemical & Odor Filtration
3. Room Coverage
4. Noise Rating
5. Filter Life & Replacement Costs
6. Ease of Operation & Filter Replacement
7. Quality of Construction: Air-tight design, no off-gassing
8. Electronic Filter Life Monitoring
9. Manufacturer's Credibility, Warranty & Return Policy
10. Quality of Filters
11. Value for Price
The Blueair 200 series utilizes a different design from the rest of the Blueair models. Whereas, the ionizer in the larger Blueair models is located inside the unit before the filter which charges the incoming particulates as they enter the unit prior to being filtered, the ionizer in the 200 series is located at the top of the unit which releases negative ions into the room, charging the particles in the air. One might wonder if the 200 series design is as effective as the one used in the larger models and the answer is yes. The negative ions are released into the air and collide with the airborne particles where they become negatively charged. These charged particles are then drawn into the air cleaner where the electrostatic attraction to the filter surface results in their removal. Since the particles in the room do not receive as strong a charge as in the larger Blueair models, they have compensated by using a higher grade filter media specifically for the 200 series. This gives the 200 series the same filtration efficiency as achieved in the other Blueair models.


  • Combines electrostatic and mechanical filtration technology to effectively capture a wide range of large and small airborne particles providing relief from allergy and asthma symptoms.
  • Optional Gas & Odor SmokeStop filter has 2 lbs. of impregnated activated carbon to provide sufficient removal of gases, odors, and VOCs.
  • Less filter restriction allows for higher air flow while maintaining a reduced noise level for continuous day or night use
  • Easy to operate and changing the filter only takes a couple of seconds with no need for tools.
  • Durable steel construction the grills and powder-coated steel exterior are easy to wipe clean, will not pick up grime or oily stains the way plastics can, and will not off-gas.
  • Safe use of electrostatic technology without producing ozone.
  • Includes a magnetic timer that reminds you to change the filters every 6 months.


The Blueair 200 series is the perfect choice for someone on a limited budget who wants an efficient, well-made air cleaner for a small room. Although Blueair has diverted to a different design with the 200 series, the efficiency at which it performs is not affected. It continues the reputation Blueair has for making very quiet air purifiers, and this one happens to be their quietest. It is even notably quiet on the high speed. Like the other models, the filters need to be replaced every 6 months and they are expensive at $100 to $200 annual cost depending on whether or not one chooses the HEPASilent particle filter or the Gas & Odor SmokeStop filter. We wish Blueair would have designed their units with a separate pre-filter to extend the life of the main filter and lead to less overall maintenance costs in the long run. However, the addition of a pre-filter could affect the airflow reducing its room coverage, resulting in the need for a larger fan which would increase noise level. Therefore, Blueair decided to stay with their current design of 3 filters-in-one which remove the large particles in the front, medium size towards the middle and ultra-fine towards the back. Overall, a great quiet air purifier for a small room.

Blueair Classic 203 Slim Air Purifier with HEPASilent Filter


Blueair Classic 203 Slim Air Purifier with HEPASilent Filter

  • Size: 21'H x 17'W x 9.5'D
  • Cleaning range: for rooms up to 240 sq. ft.
  • Fan speeds: 3
  • Controls: manual dial
  • Included Filter: 1 HEPASilent particle filter of polypropylene
  • Recommended for: general indoor air pollution control including pollen grains, house dust mites, mold spores, and pet dander in a small bedroom or office
  • Colors: White

Technical Specifications of Blueair Classic 203 Slim Air Purifier with HEPASilent Filter

  Blueair Classic 203 Slim Air Purifier with HEPASilent Filter
Model Number
Model Number 203
Square Foot Coverage
Square Foot Coverage 240 sq. ft. (5 air changes per hour)
Power Requirements
Power Requirements AC 120V, 60 Hz
Energy Consumption
Energy Consumption 20-80 watts
Clean Air Density Rate (CADR)
Clean Air Density Rate (CADR) Smoke = 155, Dust = 155, Pollen = 155
Delivered Air Flow
Delivered Air Flow 60-150 cfm
*GO SmokeStop filters reduce airflow to some extent (5-15%)
Decibels 32-56 dB(A)
Dimensions 21'H x 17'W x 9.5'D
Weight 25 lbs.
Pre-filter No
Particle Filter
Particle Filter HEPASilent filter
Carbon weight
Carbon weight 2 lbs. of activated carbon in GO SmokeStop filters
Warranty 5 year limited warranty

Video Reviews of Blueair Classic 203 Slim Air Purifier with HEPASilent Filter

Filters & Accessories for Blueair Classic 203 Slim Air Purifier with HEPASilent Filter

Blueair 200/303 Series HEPASilent Particle Filter

Includes 1 HEPASilent particle filter for the Blueair 201, 203, 205, 250E, 270E, 303 air purifiers. One complete filter change. Replace every 6 months.

Availability: In Stock. Ships Same or Next Business Day. Does Not Ship to Canada.



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