MERV 13 filters should be changed every three to six months, depending on the brand of filter, level of contaminants in the air, and the amount of use your HVAC system gets.
Not changing your air filters can lead to a number of problems, including:
Dirty air: Air filters capture contaminants from the air, so if they’re not changed, those contaminants will build up and be recirculated through your HVAC system. This can lead to poor indoor air quality and respiratory problems for occupants.
Increased energy costs: Dirty air filters can restrict airflow and increase the amount of energy your HVAC system uses. This can lead to higher energy bills.
Reduced HVAC system efficiency: Dirty air filters can reduce the efficiency of your HVAC system, leading to higher energy bills and a shorter lifespan for your system.
Increased repair and maintenance costs: Dirty air filters can cause damage to your HVAC system, leading to increased repair and maintenance costs.
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