How often do I change the filter?
Keeping your filters clean is one of the most important and inexpensive ways homeowners can both increase the performance and help prolong the life of their HVAC systems. Dirty air filters can reduce the amount of airflow through your system, making your system work harder. Homeowners should avoid running their HVAC systems without filters. Filters improve indoor air quality, while preventing the accumulation of dust and dirt on the working parts of your furnace or air handler. Accumulated dirt can drastically reduce your system’s efficiency and performance, and it is frequently the cause of system breakdowns.
You should change your filters whenever they are dirty. For an easy rule of thumb, the Department of Energy recommends replacing regular air filters in your furnace every month.