What is the MERV 13 Rating Equivalent To?

When it comes to air filters, the MERV 13 rating is often a popular choice. But what does this rating mean and is it enough to provide adequate protection?The MERV 13 rating is equivalent to the MPR 2800. This rating indicates that the filter will trap at least 75% of air particles between 0.3 and 1.0 microns in size. It will also capture 90% or more of particles between 3 and 10 microns in size.

While this is a step in the right direction, it may not be enough to protect against smaller particles such as the coronavirus, which measures 0.1 microns. When shopping for a new air filter, it's important to check the MERV (Minimum Efficiency Report Value). A HEPA filter with a MERV 17 rating will trap 99.97% of air particles with a size of 0.3 microns, and even more of those that are smaller or larger than that size. However, due to logistical problems and the high cost of installing a higher MERV filter, the CDC and ASHRAE recommend adding commercial portable HEPA air purifiers with the appropriate ACH (hourly air change) for the space. A HEPA filter is considered the ultimate solution when it comes to air filters and far exceeds what a MERV 13 can do. If you want a filter that will improve indoor air quality and not just protect your heating and air conditioning system, opt for a MERV-13, FPR-10, MPR-1900 or higher.