Request a Quote:
How often should furnace filter be changed?
In general, this is how often changing furnace filters needs to be done: For 1- to 2-inch filters, replace them every 1 to 3 months. For 3- to 4-inch filters, replace them every 6 to 9 months. For 5- to 6-inch filters, replace them every 9 to 12 months.
What happens if you don’t change your furnace filter?
Without a new air filter, the furnace will overheat every time it starts up again. This is referred to as short cycling. Dirty furnace filters cause your furnace to work harder than it should due to a decrease in airflow. The harder your furnace works, the quicker its parts will wear out and need repairs.
Basic furnace filters are designed to trap dust, dirt, and airborne particulates before they can get into the system and potentially damage the fan or the heating coil. More expensive filters perform the same role, plus they can enhance the air quality in your home by trapping bacteria, pollen, and mildew and mold spores. Since most of the air in your house circulates through your HVAC system, furnace filters are your first line of defense against dust and airborne allergens.