So far so good.
After looking at dozens of Reviews online about Air purifiers I settled on blue air as the company I would purchase from. The two units I purchased replace two units from.Molekule. As Of now, I feel like the blue air units do a better job at maintaining air quality. At their lowest speeds, they are virtually silent, and if you use the auto setting remain silent until the unit senses are declined an air quality… Making the unit kick into a higher gear to clear the air. At that point you do notice Some noise, but nothing uncomfortable or unreasonable in volume. Also, I find that the filters are very easy to replace and or certainly not as expensive as the filters I needed to purchase For my other system. So far, I am pleased with the purchase.