Fair, but just remember that the purpose of a filter (in this context) is to keep particulate matter out of the evaporator to protect it from damage. Since clea

Fair, but just remember that the purpose of a filter (in this context) is to keep particulate matter out of the evaporator to protect it from damage. Since cleaner air is just a side-effect of that protective effect, I would agree that there’s probably better ways to clean air if that’s really your goal. It’s kind of like how (traditional) circuit breakers are designed to protect the premises wiring from catching fire when too much current passes through them. They could care less if you get electrocuted or you overload a higher-gauge extension cord (GFCI and arc-fault are another story though).