HVAC

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

Exploring Various Types of HVAC Filters

HEPA (High-Efficiency Particulate Air) Filters

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

The pros include:

  • Highly effective
  • Can filter both small and large pollutants such as dander and pollen

The cons include:

  • Prone to sedimentation, resulting in reduced efficiency
  • Can’t eliminate odors, fumes, and gases present in the indoor air

Activated Carbon Filters

Activated carbon filters usually have minute absorbent pores that unite particulates present in the air through chemical reactions. The carbon particles usually bond with pollutants, trapping them in the process. Activated carbon filters can effectively trap odors, fumes, smoke, and gases. Other filters can also be used alongside activated carbon filters.

The pros include:

  • Good air filtration
  • Efficient operation since trapped pollutants aren’t released back into the air; this is because the pollutants and carbon particles have a strong bond

The cons include:

  • Unable to filter microorganisms such as viruses and bacteria
  • Not as effective when compared to other types of HVAC filters

Electrostatic Filters

An electrostatic filter produces static magnetism that attracts airborne particles. Strong static magnetism ensures trapped particles remain in place, which means the air in your home will be 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 pros include:

  • Cost-effective
  • Good air filtration since an electrostatic filter can trap smaller pollutants
  • With a MERV rating of 6, an electrostatic filter can operate efficiently

The cons include:

  • Insufficient airflow when the electrostatic air filter is clogged
  • If using a reusable electrostatic air filter, it needs to be cleaned at least once a month to ensure 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, labs, and daycares.

The pros include:

  • Good air filtration
  • Offers good results

The cons include:

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

Factors to Consider When Choosing HVAC Filters

The Size of the Air Filter

Air filters come in different sizes. If you aren’t sure which size is meant 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. Every material has its pros and cons. For instance, fiberglass is one of the more affordable materials; however, it isn’t as effective as polyester and cotton and is also less durable. Always weigh the pros and cons to make an informed decision.

Performance of the Filters

The efficiency of a filter is measured by the MERV rating. If you have issues with allergies, you can purchase a filter with a MERV rating of 8 or above. Nevertheless, you need to ensure that the air filter you’re purchasing 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 instance, does your home accumulate a significant amount of dust or pet fur? If so, you need to replace your air filters frequently. Generally, if you have a 1-inch air filter, you need to check it monthly. Apart from the monthly checks, the air filter is supposed to be replaced when necessary, usually every 90 days.

Upgrade Your HVAC System’s Performance With the Right Filter Choice

Custom Air Inc. has been serving the residents of the Piedmont Triad area for over two decades. 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 packaged HVAC system. If you need any of these services, contact us today.

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