When it comes to air purification, HEPA filters are the gold standard. All HEPA filters have a MERV rating of 17 or higher, making them far more effective than other air filters on the market. Manufacturers of commercial-grade air purifiers, such as ISO-Aire, recommend using air filters with a MERV 13 rating or higher whenever possible. This is especially beneficial for people with asthma and allergies, as well as for homes with pets. The difference between a MERV filter and a HEPA filter can be explained by Kevin Albers, ISO-Aire developer, in this short video.
If you use the HEPA test on a 95% ASHRAE air filter, it will achieve an efficiency of approximately 50% with 0.3 micron particles once they have been dusted. This means that HEPA air filters are at least 50% more effective at removing breathable-sized airborne particles than any of the ASHRAE air filters available on the market. When searching for the best air filter for your home, you may come across recommendations for both MERV and HEPA air filters. Many ventilation systems are not designed to accommodate HEPA filters, but these filters are available as portable air filters or vacuums. While any air filter is better than having no air filter at all, you'll find that the air filters in the MERV 11—13 range are perfect for most residential spaces. A HEPA filter with a MERV 17 rating will trap 99.97% of air particles that are 0.3 microns in size, but will capture an even greater percentage of particles smaller or larger than that size.
Commercial air conditioning systems can be designed to house higher-efficient air filters, including HEPA filters. ASHRAE or MERV air filters are tested using dust spot tests, which incorporate fine dust, powdered carbon, and some cotton liners. If you're considering switching to a higher-efficient air filter, it's important to check with a local Carrier expert or HVAC professional to ensure that your home or office air conditioning system is capable of supporting that type of filter. In conclusion, HEPA filters have a MERV rating of 17 or higher and are far more effective than other types of air filters on the market. They are recommended for people with asthma and allergies, as well as for homes with pets. It's important to check with an expert before switching to a higher-efficient filter to make sure your system can support it.
