If you have a large household or pets in the home it’s more likely that the home will accumulate more dust, dirt and pet dander etc. so, this is one situation where your home would benefit from replacing the filters more frequently, it can even be done every month. Another good reason to change filters more often is if any members of the household suffer with allergies or if there is anyone who smokes indoors.
Something else that will have a big impact on indoor air quality is the homes outdoor surroundings. For example, if you live in a rural agricultural area or if construction is taking place nearby, these would be good reasons to change filters regularly. You should also change them if there have been any wildfires in the area.
If you notice that the HVAC filter is damaged at all or if it is wet or damp, then this should be changed immediately as harmful toxins like mold spores could end up being released into the home. As we can see, regularly replacing the homes HVAC filter goes a long way to maintaining a healthy indoor air quality. You should also have the system serviced once a year.