Doesn't filter the air any better than other units on the market for a far less price. After the first replacement filter, a few months after receiving the new Molekule unit, the unit stopped working. Molekule sent another filter and of course, the unit still did not operate correctly. They offered to take the unit back and replace the unit. Good right? You would think so, BUT... I had to buy a box to return the unit and after they received the unit, they sent me a REFURBISHED unit. Who wants a unit that had problems and is now allegedly fixed as a replacement? When you return a defective appliance, you should receive a new replacement. I mean, this is a $1,000.00 unit and your expectations of quality is high. When I questioned receiving a refurbished unit, Molekule said it is against their policy to replace defective units with another new unit. And the new unit was only several months old. I am now trying to get a full refund. So, BUYER BEWARE, do not purchase a Molekule, they do not last, they do not filter air any better than other units on the market and Molekule does not stand behind their product.