I'm using Novita NAP600. Received as a hse warming gift but I decided to put at my mom's place as I did my confinement there and cz my dad smokes. It really helps me to contain my asthma. I used to need my blue ventolin every night whenever I stayed over at my mom's but since I put the purifier there and throughout my confinement, I did not need to use my inhaler at all (my irresponsible dad still continued smoking in the hse -.-).