How to Change a Home Air Filter

Changing a home air filter is a quick and simple task that can save you money in the long-run by keeping your furnace from becoming damaged with particles and dust. It can also help prevent respiratory illnesses by improving the air quality in your home.

  • Air filter
  • Vacuum
  • Damp cloth

Changing a Furnace Air Filter

Turn the furnace power off on the main circuit breaker, and locate the air filter in the blower compartment of your furnace.

Slide the old filter or filters out, noting which direction they are facing. Slide the new filter or filters into place, making sure the new filter is pointing the correct way.

Wipe down the area with a damp cloth to gather the lose dust that escaped. Turn the furnace power back on at the main circuit breaker.

Changing a Wall Vent Air Filter

Remove the cover of the vent and remove the air filter. Some vents call for a screw to be loosened and others just fit tightly over the air filter compartment. Some air filters slide out of place while others snap out.

Point the arrow on the new filter's edge toward the ductwork, not toward the living space, and insert the air filter.

Vacuum the area around the filter before replacing the vent. In addition, wipe down the area with a damp cloth to gather the lose dust that escaped.

Tips and Warnings

  • Purchase the same size of filter being used. You can shop around a bit since some filters are more effective than others.
  • Replace air filters every three months.

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