What are the Main Types of Air Filters?

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John
June 30, 2023
News Reviews

Air filters are important in an HVAC unit, and their main function is to eliminate toxic particles from the air coming through it. Perfect filtration is key, as it keeps the indoor air quality in the best state. Professionals use the MERV rating to determine filter efficiency; research will enable you to make a more informed decision.

MERV rating ranges from 1-16, with 16 given to the best-performing filters. Remember, the MERV rating for different air filters depends on the manufacturer and quality. Below we discuss how to choose the best laminated filter media roll.

Types of Filters

The leading difference between different air filter designs is determined by their ability to eliminate air-borne pollutants in your premises. This ability significantly depends on the layout and type of material in question.

The most common air filters include the following;

Fiberglass Air Filters

These filters are also known as flat-paneled filters, and they are made up of glass strands put together by a metallic grate. These filters are among the most preferred in an HVAC unit due to their affordability.

Despite these filters being overly common, they have a minimal impact on indoor air, as they only eliminate 20% of particles.

Pleated Filters

Pleated filters are made using a fabric medium made using either cotton or polyester. The material is arranged into a fold to enhance the filter’s surface area, meaning filters with many folds are more effective.

Pleated filters are more expensive than the above type and more effective against contaminants. These filters capture tiny pollutants like pet dander and pollen, making them the ideal choice.

HEPA Filters

HEPA stands for high-efficiency particulate air, and they eliminate over 99% of air-borne pollutants, including pollen, dust, and bacteria. These filters have high efficiency, making them ideal for people with an air conditioner allergy.

However, HEPA filters are costlier than pleated and fiberglass filters.

UV Light Filters

UV light filters eliminate bacteria using short-wave UV light. These filters have a UV lamp that cleans passing air, making them ideal for eliminating harmful microorganisms like mold spores.

However, these filters have their downsides. These filters can turn oxygen molecules into ozone molecules, which can cause health effects like coughing. Even though these filters eliminate viruses and bacteria from the air, they have a minimal impact on pollutants like dust.

Electrostatic Filters

Electrostatic filters create static energy using a blend of paper and cotton fibers. This static then traps all pollutants within the filter screen. Electrostatic filters are ideal for allergic people, as they stop allergens from spreading in your house.

Electrostatic filters are equipped with a carbon filter to improve efficiency. This AC filter type can be pleated or flat-paneled and occur in disposable and washable options.

Final Thoughts

Air filters play a key role in your interior air quality and should undergo the necessary maintenance practices to ensure you stay healthy always. Air filters are available in different types, including HEPA and electrostatic designs.

The above article has discussed the main types of air filters, and more information is available online.