An air filter is an essential part of your HVAC system. It ensures that the air you are breathing in is clean and free of dust particles or allergens. As a result, you need to ensure that the filters are in good condition and also change them when necessary. Different types of air filters have MERV (Minimum Efficiency Reporting Value) ratings, which means their ability to filter air particles varies.

Explore Various Types of HVAC Filters

HEPA (High Efficiency Particulate Air) Filters.

The HEPA filter can combine a considerable percentage of particles and allergens present in the air, including those as small as 0.3 microns. His MERV is 16.

The advantages include:

• Very effective
• It can filter both small and large pollutants such as dander and pollen

Disadvantages include:

• Susceptible to sedimentation, resulting in reduced efficiency
• They cannot eliminate odors, fumes, and gases present in the indoor air

Activated Carbon Filters

Activated carbon filters usually have minute absorbent pores that bind particles present in the air through chemical reactions. Carbon particles usually bind to pollutants, trapping them in the process. Activated carbon filters can effectively capture odors, fumes, smoke and gases. Other filters can also be used in conjunction with activated carbon filters.

The advantages include:

• Good air filtration
• Efficient operation as the pollutants captured are not released back into the air; this is because pollutants and carbon particles have a strong bond

Disadvantages include:

• It cannot filter out microorganisms such as viruses and bacteria
• Not as effective compared to other types of HVAC filters

Electrostatic Filters

An electrostatic filter produces static magnetism that attracts particles in the air. Strong static magnetism ensures that trapped particles stay in place, meaning the air in your home is free of allergens. Electrostatic filters come in two variations: disposable and reusable types. Depending on your needs and preferences, you can choose the one that suits you.

The advantages include:

• Cost-effective
• Good air filtration as an electrostatic filter can capture smaller pollutants
• With a MERV rating of 6, an electrostatic filter can work efficiently

Disadvantages include:

• Insufficient air flow when the electrostatic air filter is clogged
• If you use a reusable electrostatic air filter, it needs to be cleaned at least once a month to ensure that it can operate efficiently.

UV (Ultraviolet) Air Filters.

UV HVAC filters kill bacteria and viruses using ultraviolet rays. UV lamps present in the filters disinfect the air passing through the heating and cooling units through germicidal irradiation. UV filters are suitable for different environments, such as kitchens, laboratories and daycares.

The advantages include:

• Good air filtration
• It offers good results

Disadvantages include:

• Less effective as they cannot get rid of pollutants such as fumes, odors, and cigarette smoke

Factors to consider when choosing HVAC filters

Air Filter Size

Air filters come in different sizes. If you are not sure what size is intended for your current HVAC unit, you can check the owner’s manual or contact us at Custom Air Inc..

Filter Material

Some of the materials used when manufacturing air filters include cotton, fiberglass, and polyester. Each material has its advantages and disadvantages. For example, fiberglass is one of the most affordable materials; however, it is not as effective as polyester and cotton and is also less durable. Always weigh the pros and cons to make an informed decision.

Performance of Filters

The efficiency of a filter is measured by the MERV rating. If you have problems with allergies, you can buy a filter with a MERV rating of 8 or more. However, you need to make sure that the air filter you are buying is compatible with your heating and cooling system.

How often air filters should be replaced

Different factors dictate the period for replacing air filters. For example, does your home accumulate a significant amount of dust or pet fur? If so, you need to replace your air filters often. Generally, if you have a 1 inch air filter, you need to check it every month. In addition to monthly checks, the air filter is supposed to be replaced when necessary, usually every 90 days.

Upgrade Your HVAC System Performance With The Right Filter Selection

Custom Air Inc. has been serving residents of the Piedmont Triad area for over twenty years. We offer services such as heating repair, installation, and tune-ups. Additional services include AC repair, installation and maintenance, ductless mini-split AC, duct services, indoor air quality, UV lights, and a packaged HVAC system. If you need any of these services, contact us today.