The term HEPA represents a special kind of air filter that’s more effective in filtering out tiny particles. While you may know about HEPA-equipped air purifiers and vacuum cleaners, some HVAC systems are also equipped for these special filters. If you’re looking to upgrade your home comfort system or supplement it with indoor air quality solutions, the following guide will help you understand more about this technology.

What Is a HEPA Air Filter?

A high-efficiency particulate air filter is engineered to filter out 99.97% of particles that are as small as 0.3 microns. This specific measurement is important because particles this small can pass through traditional filters and may get released into treated air. The fine fibers in a HEPA filter prevent this from occurring, ensuring the levels of pollen, mold, dander, and other contaminants are reduced. This level of protection is often recommended for those with allergies, respiratory illnesses, or pets.

By comparison, a minimum efficiency air filter, which is found in most HVAC systems, is rated for filtering out 75% of airborne particles 0.3 microns or greater. While this means it won’t catch all of the contaminant particles that a HEPA filter will, it’s an effective safety measure for the average household. When choosing a minimum efficiency filter, products with a MERV (minimum efficiency reporting value) rating between 13 and 16 will generally suffice for adequate performance.

How Does a HEPA Filter Work? 

There are four ways that the HEPA filter works to trap particles in treated air. First, particles fly straight into the filter’s fiber and get caught. Particles that evade this direct impact then pass between two different fibers in the filter. If the particle’s larger than the gap between the fibers, it gets trapped in a process called sieving, which involves two fiber layers. 

Some particles are pushed through these gaps along with the air current, but they’re eventually intercepted. Air forces the particles against the fiber walls, where they become lodged and unable to break free. The smallest particles are lighter and may move faster through this filtering process. As a final line of defense, though, their erratic paths force them into the filter’s fibers, where they get stuck. 

If your current system is designed for regular air filters, you can’t just replace it with a HEPA filter. Located in Thomasville, NC, Comfort Tech Heating & Air Conditioning can help you upgrade your HVAC system to one that accommodates HEPA filters for supreme indoor air quality. By mentioning their website, you’ll receive a $20 discount on your first service call. You’ll also be eligible for an additional $50 Visa check card if one of your referrals gets a new system installed in the Piedmont Triad area. Learn more about their EPA-certified services online or call (336) 472-5858 to request a free estimate for guaranteed service.