How Often Should You Change Your HVAC Filter?

A dirty filter is the single most common cause of poor airflow, frozen coils and wasted energy. Here is how to stay ahead of it.

General guidelines

Standard one-inch filters are commonly changed every one to three months. Thicker media filters may last six to twelve months, according to the manufacturer. Check monthly at first so you learn how fast yours loads up.

What shortens filter life

Pets, dust, renovation work, high usage during the long cooling season and nearby construction can all load filters faster.

Choosing a filter

A higher efficiency rating captures smaller particles, but it can also restrict airflow if the system was not designed for it. If you are unsure, ask us before switching to a much denser filter.

Signs your filter is overdue

Weak airflow, dust around vents, a system that runs longer than usual or ice on the coil.