How Often Should You Change Air Conditioning Filters?

Different filters require different change intervals.

Changing Depends on Filter Type

According to the heating and air conditioning website Furnace Filter Care, different quality features require changing at different intervals. Highly efficient filters require changing at least once per month, and users with economy filters, sometimes known as panel filters, should change them every two to three months. Owners who have invested in a reusable filter should clean the filter at least once per month.

Environmental Factors Matter

Though different air conditioning filter types require changing at different intervals, environmental factors also have a considerable impact on change frequency. Users should change filters in dirty environments more frequently than filters in very clean environments. Other factors like pet fur and dust can shorten a filter's life.

Bottom Line

Very efficient filters require changing at least once per month, and less efficient filters require changing every two to three months. Users in dusty or dirty environments should change air conditioning filters more often.

References

• Furnace Filter Care: When To Change Your Air Conditioner Filter
• Heating & AC: Frequently Asked Questions