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Everything You Need to Know About Air Filters

Posted on Air Quality, Blog June 20, 2017

It’s easy to forget about your AC unit’s air filter, but changing it regularly is important. Wondering why? Here’s everything you need to know about air filters.

What They Do

Air filters protect your AC unit by preventing dirt from entering it. So long as the cooling system stays clean, it remains efficient and saves money on your energy bill. When you don’t change a dirty air filter, the small amount of air that gets through tends to push grime into the unit.

Air quality is another important consideration. High-quality air filters block air pollutants like dust, pollen, and mold. If you or someone in your family has allergies or asthma, changing the air filter is necessary for health reasons.

How to Choose One

You need to know what size to shop for. If you don’t know the dimensions of your current air filter, take it out and measure its length, width, and height. Next, decide what level of air purity you want for your home. A high-efficiency filter removes 85 percent of air pollutants, while a fiberglass air filter mostly just protects your AC unit. Look at the MERV rating — the higher the number, the more air-borne pollutants it blocks.

When to Change It

Most manufacturers recommend replacing the air filter every 30 to 90 days, but the exact schedule you follow depends on your situation. You should change the filter if the unit is running often during summer months or if someone in the house has allergies. Pet owners should change the filter more often than non-pet owners. If you have a vacation home that you rarely use, you can use the same filter for six to 12 months.

Now you know why air filters are so important for your AC unit. To improve your home’s air quality even more, consider having your air ducts cleaned. Call All Year Cooling 855-825-8861 to schedule an appointment. Our friendly staff will be happy to help you.


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