• Does Blueair's ionization process produce dangerous levels of ozone?

No. The most stringent government standards for indoor ozone are those of the Food and Drug Administration for indoor medical devices, which specify that ozone output be no more than .05 ppm. The Blueair 501 has been tested for ozone emissions by the Swedish National Testing and Research Institute according to the EC/IEN 60335-2-65 §32 standard. The unit has been placed in a 26 square meter closed room and continuously tested for 24 hours. In this a closed test room, probes measured ozone levels at 0.001 ppm - a tiny fraction of the amount deemed hazardous to human health. Our design safeguards against excessive ozone production, and then removes ambient ozone particles from the air.
You can download the complete conclusions of this test by clicking here.

The test demonstrates that HEPASilent™ filter technology reduces ozone in a sealed room, despite the trace amounts of ozone produced as a by-product of ionization technology.

• When should I replace the filters?

The life span of your filters depend of two main factors:
- Level of usage of your purifier: is it intensive or occasionnal? Usually filters used in electronic air purifiers will last longer as the purifier only works when the air is dirty.
- Indoor air quality: if your air is full of particles (for example if you just painted the walls), you will have to change the filter more regularly.
In most cases, we recommend changing the filters every six months.

• What is the CADR?

The CADR, or Clean Air Delivery Rate, measures the efficiency of an air purifier. It indicates how well the purifier filters pollens, dusts and cigarette smokes present in the air. The higher the CADR, the more powerful the air purifier.

The CADR of Blueair products is measured by the AHAM (American of Home Appliances Manufacturers). On this website, we display the CADR of each purifier on its product page.

• Where are Blueair products used?

Blueair units are used all over the world in houses, offices, medical practices and surgical units.

Furthermore, the Blueair purifiers have been tested numerous times by independant organizations.
A test realized in a Swedish school by Allergena shows a 94% reduction of bacteria in the air and a 99% reduction of moistures after using a Blueair purifier for 14 days. You can download the complete findings of this study by clicking here.

A second test realized in the university hospital of Karolinska (Sweden) has proven a reduction of 90 to 95% of the bacteria present in the air. You can download the conclusions of this test by clicking here.

• How are the 01 and 03 models different?

• Are Blueair's products suitable for people with pollen allergies?

Blueair air purifiers are equipped with very powerful filters that captures pollens. In fact, when tested by independant organisations, they consistently obtain high values of pollen elimination. As such, they can improve the quality of life of allergic persons.