The frequency of changing air filters depends on various factors such as the type and quality of the filter being used, the size of the home, air quality outside, and whether or not you have pets .
For example, if you have fiberglass filters which are relatively poor quality, experts recommend changing them once every 30 days. However, the general recommendation for how often to change air filters can range from every 30 days to every year.
If you live in an area with constant high or low temperatures during your daily drive, regularly drive in extremely dusty or sandy conditions, or live or work near a construction zone, you should replace the filter at least once a year or sooner.
