(Last Updated On: March 24, 2023)
What Is a HEPA Filter?

In order to choose the right air purification technology, it is important to identify what features you are looking for and the key differences between brand models. The best air purification technology currently on the marketing is HEPA, or HEPA-type, filters. HEPA’s advanced technology helps to capture up to 99% of airborne particles, making them effective for air quality maintenance.

HEPA Filter for an Air Purifier

So, what is a HEPA filter? HEPA stands for High Efficiency Particulate Arresting, and was designed in the 1940s to prevent airborne radioactive contaminants from spreading. In the 1950s it became commercialized and has evolved to serve the needs of homeowners, hospitals, high tech industries, pharmaceuticals, aerospace, and nuclear power.

What Is a HEPA Filter Made Of?

There are several requirements that must be met in order for an air filter to meet the HEPA standard. It must be able to remove 98% of all particles that pass through and must satisfy the standards of the United States Department of Energy (DOE), which regulate the HEPA standard.

HEPA filters capture smaller pollutants and particles other filter types. This is due to a combination of three mechanisms: interception (particles that go through the air stream adhere to the interior fiber), impaction (larger particles are not able to avoid fibers so they embed in one directly), and diffusion (which raises the probability that particles will become stopped through the interception or impaction mechanisms). Brands such as Alen or BlueAir meet this standard with their use of electrostaticity in the airflow. This added technology causes pollution particles to stick to the filter media, which makes it far more effective.

What Is a HEPA Filter Being Used for in My Vacuum?

It is common for vacuum cleaners to feature HEPA in their filtration system, and you may be wondering the difference between the two. These efficient HEPA vacuum filters trap even the finest of particles while vacuuming, including dust mites and pollen, which are the direct source of allergy and asthma symptoms. However, in order for a vacuum cleaner filter to be efficient, it should be designed in a way that the air that is drawn inside the machine and expelled through the filter. This is sometimes called sealed HEPA and should not be confused with the simple HEPA label. In a regular HEPA filter there is still a chance that some air can pass through the filter.

Along with vacuums, some new car models feature air filters that look very similar to HEPA filters; however, they should not be mistaken as such. In addition, modern airplanes use HEPA to prevent the spread of airborne pathogens in the recirculated air.

HEPA Filters for Your Home

When asking which is the right HEPA filter and air purifier for your home, there are many things to consider. Important criteria, such as the coverage area or how simple it is to replace the filter should be examined prior to purchasing.

If you’re still wondering which filter is best for your family, visit our Air Purifier Filters page to learn more.