Changing the Furnace Filter Impacts Your HVAC System Efficiency

March 20, 2015

Reducing heating and cooling bills is on the minds of many Sarasota area homeowners these days. Programmable thermostats are more popular than ever, and high-efficiency HVAC systems are in more homes. One simple task that drives HVAC system efficiency that doesn’t require programming or a substantial investment is changing the furnace filter regularly.

Filters Protect the HVAC System

The furnace and A/C system can circulate a home’s airflow many times over in one day during peak usage. Airborne contaminants can bind to HVAC components, such as the blower motor, evaporator coil and air ducts. When contaminants accumulate on system parts, heating and cooling efficiency is reduced and the HVAC system can break down.

Regularly changing the furnace filter is essential for maintaining a functional and efficient HVAC system. The U.S. Department of Energy states that a clogged air filter can increase heating and cooling energy consumption up to 15 percent. Reduced efficiency is caused by both a clogged air filter, which demands greater work from the blower motor, and reduced heat exchange.

The evaporator coil of the indoor air handling unit (AHU) needs free airflow to instigate and drive efficient heat exchange. However, debris can easily bind to the coil and fins. These components are also easy breeding grounds for mold, mildew and bacteria, which can obstruct airflow and heat exchange. When airflow is restricted in a heating system, the furnace will become too hot and shut down.

Changing the Furnace Filter

It’s important to use an air filter of good quality. Cheap disposable fiberglass filters don’t capture most mold spores and bacteria, and many particles pass through, which contribute to reduced efficiency. Read filter packaging and select a filter that captures the contaminants you desire removed from your home. The filter must fit snugly. Whichever filter you decide upon, make sure to check it as suggested by the manufacturer.

Learn more about changing the furnace filter regularly from the HVAC pros at Custom Air & Plumbing or contact us today at (866) 819-0992 to schedule routine HVAC system maintenance.