Changing or cleaning your furnace filters are important for your furnace system’s performance, energy efficiency, and indoor air quality. By doing so, you’ll have more effective and efficient furnace that provides better indoor air quality. Buying higher rated MERV filters make a difference too! The higher the rating, the better air quality.
Below are articles that provide more detail on what a furnace filter is, what are the different types, and when they need to be changed.
General information on what is a furnace filter:
Different types of air filters:
Why and when filters should be changed: