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Your furnace filter directly impacts indoor comfort levels as well as your heating bill. When shopping for filters, it’s important to choose one that enhances the efficiency of the furnace in your Sanford, North Carolina, home.

Spun Fiberglass Filters

Merv Rating: 1-4

Spun fiberglass filters will capture about 80 percent of airborne particles that are 50 microns and larger. They can effectively filter about 25 percent of particles that fall into the three to 10 micron range. Spun fiberglass filters are the best option for achieving maximum energy efficiency because they barely restrict airflow.

Disposable Pleated Paper Filters

Merv Rating: 5-8

A disposable pleated paper filter will trap 80 to 95 percent of airborne particles that are five microns and larger. They are well known for their effectiveness in filtrating air and improving indoor air quality. Compared to spun fiberglass filters, disposable pleated paper filters are about four times as expensive. These filters perform better at filtrating air than spun fiberglass filters, but they aren’t as energy efficient.

Also, when thinking about disposable filters, it’s important to keep in mind that they require more frequent changing. So, not only are they more expensive, but you’ll also be changing them more often than other types. Changing them so often occurs because of their enhanced level of filtration. They trap a significant amount of airborne allergens, meaning they get dirty quickly. Furthermore, to achieve maximum efficiency with a disposable filter, you’ll need to set the fan to "On" instead of "Auto." This will likely increase your energy bill.

Electrostatic Filters

Merv Rating: 2-10

Electrostatic furnace filters capture airborne particles by using self-charging fibers. Airflow is minimally restricted, making these filters good for achieving maximum energy efficiency. Electrostatic filters are available in disposable and washable versions.

Cape Fear Air Conditioning, Heating, & Electrical Company, Inc. specializes in a variety of furnace installation, repair, and maintenance services. Contact us today at 910-216-9394 to learn more about choosing the right filter for your furnace.

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