What Are The Different Kinds Of Furnace HVAC Filters?
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What Are The Different Kinds Of Furnace HVAC Filters?

Not all filters are created equal. Did you know there are different types of filters for HVAC systems? Here are the most common types of furnace filters:

Flat-panel:
This is the type you might typically see in home improvement stores, where fibers (usually fiberglass) are stretched over a flat frame. It is usually the least expensive type of filter, but it tends to be lower quality and many particles can get through.

Closeup view on air filter. Filtration concept.

Pleated:
Pleated filters feature dense screens of plastic or cotton fibers. Just as flat-panel is named because the fibers are stretched flat, pleated filters are named because of their distinctive pleats. The greater surface area allows for better filtration, so these filters stop more particles.

Washable:
Reusable filters can be washed or vacuumed repeatedly to remove debris buildup. They come in pleated and flat-panel options, but they won’t last forever and will eventually need to be replaced.

Electrostatic:
These filters are electrostatically charged to specifically capture more tiny particles from bacteria, smoke, pollen, and other environmental contaminants. These electrostatic filters can come disposable or washable, flat-panel or pleated.

High-efficiency particulate air (HEPA):
You’ve heard a lot about this type of filter in the last year! The Energy Department supports the use of HEPA for any filter that reliably removes at least 99.97 percent of particles in the air that are 0.3 microns or larger. These are heavily used by hospitals and commercial facilities, although the COVID-19 pandemic saw a rise in residential use as well.

There are many different types of filters for HVAC systems. For consistently clean air, regularly change your filter so that it can keep dust, mold spores, and other contaminants out of your home’s air.

A note regarding COVID-19

Due to shortages caused by the pandemic, the only filters available for standard 1″ filter grilles are pleated filters. These must be changed monthly as most systems that are 14 SEER and less struggle to pull air through them because the blower motors are not strong.

Lennox also offers Healthy Climate 11 filters. These are 5” filters with a deep pleat that captures more particles without making your system overwork or releasing ozone. These are designed for 15 SEER systems and up. They are mounted at the air handler or furnace and only have to be changed annually! If you’re interested in these filters that capture more and last longer, contact PECO at (864) 639-2424.