For those in the PNW, an air filter that catches 99% of airborne particulates is *worse* than just breathing in all the ash and soot from those wildfires because it gives a false sense of clean air!No, it isn't. A filter that catches 75% is *worse* than nothing because it cultivates an false sense of security.
Even though having 1% of those particulates in your home is mathematically better than having 100% of those particulates in your home.