Man correctly installing an air vent

Why Are HVAC Air Filters so Important?

Often overlooked, air filters are a vital component of HVAC systems. While their primary function is to remove harmful particles from the air as it circulates, air filters also help regulate air temperature and keep HVAC systems in healthy working order. Here’s a look at why air filters are so important for indoor air quality and HVAC system health.

Cleaner Air

It goes without saying that air filters are primarily tasked with cleaning the air. Without air filters, dust, pollen, dirt, and pet dander would float freely through HVAC systems and the buildings they heat and cool. These allergens and harmful airborne particles wreak havoc on indoor air quality and can trigger allergies, asthma, and respiratory problems in occupants. Seeing the built-up debris on a well-used air filter is an easy way to understand their key role in improved indoor air quality.

A Healthier HVAC System

Having clean, functioning air filters is also critical to an HVAC system’s overall performance and efficiency. Having a filter in place prevents particles and moisture from building up elsewhere in the system, for example. Additionally, when air can move freely through a clean filter, the system can more consistently heat and cool a building. Clean filters also ensure that an HVAC system doesn’t have to work overtime, which prevents it from overheating, freezing up, and needing frequent repairs.

Lower Energy Consumption

In addition to requiring fewer repairs and running more efficiently, HVAC systems consume less energy with a clean filter in place. Dirty, clogged filters prevent the air from circulating properly, which causes heating and cooling systems to compensate by burning through more energy. By simply replacing HVAC air filters regularly, homeowners and building managers can keep energy consumption and expenses to a minimum.

Regularly replacing your HVAC system’s air filters is one of the most important things you can do to keep your home efficiently heated and cooled. When problems still persist, our team at Northfield Heating And Air can provide Chicagoland-area residents with air conditioning and heating repairs, as well as new air conditioning and heating installations. To schedule service, contact us today by calling (847) 251-2740.


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