First, we’re glad to hear that you know about the air filter for your air conditioning system. If your AC is in the same cabinet as your furnace (and this is the most common type of HVAC setup), then the same filter works for both units. It’s important to know about this filter, since you must change it routinely to help your HVAC system work at the optimal condition and avoid several serious problems, which can include the system overheating and the evaporator coil freezing over.
But if you think that the AC filter is there to help improve the air quality of your home, we’re glad you stopped by to read this. Although the filter has some effect on air quality, it’s usually harming the indoor air quality because the filter is too congested. The filter otherwise doesn’t noticeably improve air quality.