Blueair 500 Series: Model 503 Review

Despite being slightly more expensive than similar models, this air purifier delivers a great performance, it is very silent and comes with numerous features.

Blueair 500 Series: Model 503 Ratings

DESIGN - 95%



Despite being slightly more expensive than similar models, this air purifier delivers a great performance, it is very silent and comes with numerous features.

User Rating: 4.29 ( 8 votes)

Blueair is an established air purifier maker that relies upon a Swedish engineering focus and emphasizes product support and quality construction. Blueair’s 500 series uses HEPASilent technology to filter dust, mold spores, pollen, smoke, and other pollutants. Find out more about the Blueair 503 air purifier here.


  • Wide coverage
  • Removes particles and gaseous contaminants
  • Offers four speed options
  • Announces precisely when a filter replacement is needed
  • Easy to clean
  • Long filter lifespan


  • The design is rather bulky
  • Noisy at the highest speed
  • Warranty length of only 1 year

Technical Specifications

Air purifiers from the Blueair 500 series are suitable for large rooms where their rather bulky form and loudness (at maximum speed) would be less noticeable. The 503 model specifically covers 580 sq. ft. of space and purifies air using HEPASilent technology, which combines a HEPA-type filter, a SmokeStop filter, and electrostatic filtration. It features four speed settings, a clean air delivery rate (CADR) rating of 375 CFM, and a noise output range of 32 to 66 dB. Finally, the 503 consumes between 35W to 120W of power.

Specifications Sheet

Specs 503
Dimensions 26” x 20” x 13”
Weight 35 lbs.
Area Coverage 580 sq. ft.
Noise Level 32 – 66 dB
Power 35 – 120W
CADR Rating for Smoke 375 CFM
CADR Rating for Pollen 375 CFM
CADR Rating for Dust 375 CFM
Fan Speeds 4
Filter Type HEPASilent (HEPA + electrostatic + SmokeStop)
Odor Reducing Filter SmokeStop
Control Panel Speed control knob
Timer Function None
Warranty 1 Year


The Blueair 503 is an air purifier that promises excellent results in terms of reducing indoor allergens and odors. Its 375 CFM ratings for dust, pollen, and smoke attest to this. To filter out particles, the HEPA-type filter works with electrostatic filtration. Meanwhile, the SmokeStop Filter traps odors and gasses like VOCs and smoke. Boasting SurroundAir technology, Blueair also emphasizes air intake by designing the 503 to take in air from three different sides to maximize airflow and avoid drafts.


The only notable special feature offered by the Blueair 503 is its magnetic filter timer. Coming as a separate device with a magnetic backing, the filter timer can be attached to frequently-visited areas in your home (such as the refrigerator) for maximum visibility. It displays the precise number of days you have left before the filters in the 503 needs replacing, which is great if you’re the type who hates surprises.


The Blueair 503 is visually pleasing thanks to its Swedish design, but it does look dated compared to its more contemporary rivals. Available in dark gray and housed in a steel casing, this air purifier shouldn’t find it too hard to blend in many types of environment.

This model does take up a lot of space, though, with its 26” x 20” x 13” dimensions. Moving it around can be difficult as well, considering that it weighs a whopping 35 lbs. Although the air purifier is easy to use with its four-speed control knob, it lacks electronic buttons and an LED screen.

Warranty and Support

The Blueair 503 comes with a one-year warranty. This warranty period is relatively short for an air purifier, which makes it one of the 503’s biggest negatives. On the other hand, Blueair is known to have multiple customer support channels since it is a popular brand. With that said, they’re easy to contact through the media listed on their website.

Final Thoughts

Boasting both mechanical and electrostatic purification methods and a coverage area of up to 580 square feet, the Blueair 500 Series: Model 503 is a decent air purifier for people who are battling indoor pollution issues, but it’s not the most modern air purifier in terms of design, user experience, and features.

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