During this unprecedented time, many people are getting HEPA filters for commercial buildings. HEPA is an acronym standing for High-Efficiency Particulate Air filter. In order to be labeled a HEPA filter, it has to be tested and approved. The Institute of Environmental Sciences and Technology dictates that a HEPA filter must trap 99.97% of particulates 0.3 microns or larger. This does not mean that the filter cannot trap particles smaller than 0.3 microns, because many HEPA filters can; it is simply the threshold that must be reached in order to carry the HEPA name.
Benefits of HEPA Filters
- A relatively inexpensive way to improve indoor air quality (IAQ)
- Quiet function and easy installation
How do HEPA filters work?
HEPA filters trap air contaminants in a complex web of fibers. Depending on the size of the air particle, this can happen in four different ways including inertial impaction, diffusion, interception, or sieving. Larger contaminants are trapped via inertial impaction and sieving. The particles either collide with the fibers and become trapped or are trapped while attempting to travel through the fibers. Medium-sized particles, as they move through the filter, are grabbed by the fibers via interception. Smaller particles are dissipated as they travel through the filter and eventually collide with fiber and are trapped.
All air cleaners need periodic cleaning and filter replacement to function properly. Always follow the manufacturer’s recommendations on maintenance and replacement. Call ServicePro today to find out more about HEPA filters and how we can help you with your indoor air quality system.
