I am currently updating my beloved old 1930's home located in a foggy coastal region of SOCAL mostly due to water damage in the bathroom through the common bedroom wall due to an unknown plumbing leak. I have been suffering from major health issues recently and have finally confirmed a severe allergic reaction to molds after much $$$, meds and difficulty with doctors/tests. I had been running 2 ionizers before the Alen BreatheSmart FLEX arrived a couple weeks ago. I can say for a fact that after running the Alen purifier for about a week I was happy to find that the collection grids on the old ionizers have only about 10% of the dust/mold collected on the plates than previous to using the BreatheSmart FLEX. I have retired the ionizers and am planning on gifting this FLEX to my mom and ordering another Alen but will select the upgrade version of the BreatheSmart FIT50 with auto feature after my construction is done. YAY! Thank you for a fine product.