Answers to the most frequently asked questions about clean indoor air, how Blueair works.

About Clean Air
Why should I consider an air purification system?
What does CADR mean?

How do I make a fair comparison of air purification systems?
How small is a micron and why does it matter?

How Blueair Works
Which Blueair unit is the best for me?
What type of Blueair filter do I need?
What are Blueair filters made of?
What does HEPA stand for?
How does HEPASilent™ technology achieve such high levels of filtration?
Can Blueair systems remove indoor gases?
Can Blueair systems trap airborne bacteria?
Does using a Blueair system have any environmental impact?
Does Blueair's ionization process produce dangerous levels of ozone?

How to Maintain Your Blueair
How can I get the most from my Blueair system?
How often should I change the filter in my Blueair unit?