Doing the absolutely error-proof "ah-choo" test, I proved to myself that nothing equals a HEPA2 filter. Of course that means more electrical energy and a box that plugs into something but a month or two of operation then checking the filter element made what's left of my hair stand up on end. To think that stuff goes on a one-way trip into my lungs is frightening.
It's not just dirt. Mold spores made me suit up and mix up a mild chlorine solution and mist it through the evaporator coils. I use a full face shield.
