The filters in a gas furnace keep dust and debris off of the blower fan so that clean air is distributed into your home. However, these filters must be replaced in order to keep the system working as intended. If you have never replaced your furnace filter before, the guide below will help you determine which type you need and what you should consider before purchasing one. 

What Are the Types of Filters?

There are a wide variety of filters that capture particles of varying sizes. Here are a few common choices to consider.

• Fiberglass Filters: These disposable synthetic filters are known for their affordability. While they protect your furnace from large debris that may restrict airflow, they only have a rating between one and four on the MERV (Minimum Efficiency Reporting Value) scale. This means that they catch approximately 20% of particles that are between three and ten microns. 
• Electrostatic Filters: These filters act as a magnet by attracting air particles with electrostatic charges. Since they are washable, they last longer than disposable filters but must be completely dried before re-installation to keep mold from forming.
• HEPA Filters: High-Efficiency Particulate Air (HEPA) filters trap 99.97% of airborne particles that are 0.3 microns or greater.  This includes dust, pollen, mold, and bacteria. As a result, HEPA filters are suitable for households that suffer from seasonal allergies. 

How Often Should You Change the Filters?

While disposable gas furnace filters should generally be replaced every three months, this may differ depending on how often you use the HVAC system, how many pets you have, or how sensitive you are to the allergens in the air.

Additionally, if your home is large or you live in a big city with pollution, checking the status of your filters each month may be necessary to keep your indoor air clean.

If you are searching for an HVAC technician to help you maintain your system, South Carolina Mechanical in Conway, SC can help. This reliable company offers a wide variety of affordable services, including HVAC repairs, installations, and seasonal maintenance. They are also available 24-hours a day for clients dealing with heating and cooling emergencies. Visit them online for more information about their services, or call (843) 333-1494 for a free estimate today.