Why Heating Systems Need the Air Filter

Every furnace and heat pump has an air filter in the return vent, the purpose of which we’ll outline below for you. Needless to say, it is an essential component and, assuming that you own a disposable filter and not a washable type, must be replaced on a regular basis.

Keeping Components Clean

Many people think air filters are meant to keep the indoor air clean, but this is not their primary purpose. Filters first of all capture pollutants before they enter the furnace or, in the case of a heat pump, air handler. There are sensitive components inside that would not work as efficiently if covered in dirt and dust.

Take the burners in a furnace, for example. Covered in dirt, they won’t allow the heat exchanger to heat up the air, which means that whatever circulates through your home will be lukewarm. The furnace will also run longer, raising your utility bills. Another component you don’t want to be dirty is the furnace fan blade; it won’t spin as efficiently and may even cause the system to overheat.

Cleaning the Indoor Air

Filters will, at least indirectly, help you maintain healthy indoor air. Depending on their type, they could prevent the circulation of not only dust and dirt but also mold spores, pet dander, and dust mite droppings.

What Happens When Filters Are Dirty

Once their entire surface area has been taken up with pollutants, filters do no good. Instead, pollutants will pass through and gather in the furnace, air handler, or ducts. Clogged filters also restrict airflow, and to maintain the same rate of airflow, the heating system will need to work harder. This stress will ultimately reduce the system’s life span.

NATE-Certified Technicians to Serve You

Replacing or cleaning the filter is something that every homeowner in Mount Airy, NC, should be doing on a regular basis. However, it also makes up a part of professional maintenance. If you’re having trouble with your furnace, air conditioner, or mold, we can help with that too. Get in touch with J's HVAC Unlimited today to schedule a tune-up, and we’ll guarantee that you’ll be satisfied in the end.