How Often Should Air Filters Be Changed?

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Standard Residential Air Filter

The air filter is typically located in your furnace or air handler. Your central A/C and furnace share the same blower system and ductwork, so the same filter protects both systems.

Here is why changing the filter before and during A/C season matters:

1. Better airflow=colder air

   1. A dirty filter restricts air flow. When airflow is reduced, your A/C has to work harder.

   2. This can result in not cooling your home or business properly.

2. Lower energy bills

   1. Clean filters help the system run efficiently.

   2. This reduces the strain on the blower motor and air conditioner.

3. Protects A/C Coil

   1. Restricted airflow can cause the evaporator coil to get too cold and freeze up.

   2. This results in expensive repairs.

4. Improves indoor air quality

   1. Summer often means more pollen, dust, pet dander and humidity.

   2. A fresh filter helps trap those particles.

5. Reduces wear and tear

   1. Your HVAC system runs longer during hot weather.

   2. A clean filter reduces stress on equipment and can extend the life of each component.

Common Replacement Schedule:

• Every 1-2 months if you have pets, allergies or run the A/C heavily

• Every 3 months for lighter use

• More often during heavy construction, wildfire smoke or high pollen seasons.

  
  

  A clogged filter is one of the most common reasons people think their A/C is "not keeping up" in summer heat.