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How Changing the Furnace Filter Impacts HVAC System Efficiency Year-Round

Thursday, February 19, 2015

As long as it's in operation, your home's central HVAC system is circulating air throughout your house. As it does, small particulates like dust, dander, pollen and other airborne pollutants are picked up and carried through the ductwork. Without a filter, these could be carried into the HVAC system, building up on fan blades and even being pulled into the furnace, causing a fire hazard. The filter protects the HVAC system, and changing the furnace filter every month does too.

As the furnace filter catches particulates in your air supply, it begins to clog up. The more clogged the filter becomes, the harder it is for air to pass through, and that means that your fan has to work harder and harder to circulate air, risking burnout of the fan motor. It also means lower airflow throughout your home and slower temperature adjustment. If air can't circulate well, it could also lead to your furnace overheating as the heat it produces isn't carried away. A clogged fan is the number one cause of HVAC system failure.

Fortunately, changing the furnace filter is easy in most systems. You should consult with your system documentation to learn where the filter is located and what filter sizes and MERV ratings work with your unit. Higher MERV ratings are more efficient at catching pollutants, but only as long as the fan motor is rated to work with them. If not, they obstruct airflow just like a clogged system does.

Once you've found your filter and bought a replacement, just slide the old filter out and the new filter in. Then you can continue breathing easy, and your furnace can work at its optimal efficiency.

Learn more about furnace filters and how it affects system efficiency via Texas Air Comfort or contact us today at 866-984-8552 to schedule an appointment.

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