Review on Replacement Particle Activated Purifier Blueair by Michael Norwood

About the sound: The first stage is almost silent. We almost always leave it at this setting. The second level is perceptible, but hardly perceptible. If your environment is particularly quiet, it may sound loud. We slept with him several times in our apartment on the second floor. The third level, however. it's not quiet. If you've heard small white noise devices in doctor's offices, this is what it sounds like. It's not annoying, but I'm a light sleeper and can't have this in my bedroom. My friend said it wasn't very good but that he could probably sleep through it like an average to sound sleeper. We sometimes use this setting at work - you don't hear it there! We bought it after our apartment filled with smoke when the next block caught fire. We thought the smell was gone by the time we got back from our Thanksgiving sleepover. It turned out that the air in our apartment still smelled bad. We dared and bought this air purifier. After a few days we noticed an improvement in overall air quality, but we weren't sure if it was a placebo effect. About a week after we started using the air purifier, friends came over to play board games and they noticed they couldn't smell any smoke or anything. We are very happy and confident that this will help improve air quality.