Replace Your Air Conditioner Filter

This is one of those chores most people know they're supposed to do, but few remember.

What?

Replace the air filter on your air conditioner.

When?

Now, and again in three months (for the average home).

Why?

Because a dirty filter restricts airflow through your cooling system. Reduced airflow can mean uneven cooling, increased fuel bills, and added stress on your air conditioner.

How?

Locate the filter, which usually is where the cold air enters the furnace, near the fan section (see the diagram). The airflow arrow on the filter should point toward the furnace.

Slide the filter out and note its size. It's written on it somewhere. Buy a half-dozen filters from the hardware store.

Replace the filter now and check it monthly. Replace it as needed, but at least every three months. The rate at which it gets dirty depends on the number of people, pets and amount of dust in your home.

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Tips

• Mark airflow direction on the ductwork with a marker so that it is easier to remember the orientation of the filter the next time.
• You may want to have the ductwork cleaned to remove the previous owners' debris. Once is enough though ? don't get talked into doing it annually.
• Consider an electronic air filter if you have a family member who suffers from allergies or one who smokes. It does a great job of taking very small particles out of the air. But remember, because it does a better job of cleaning, it gets dirty faster. Clean it once a month.

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