Tag: MERV

MERV—Minimum Efficiency Reporting Value vs. Percent Efficiency

In the United States, ASHRAE standard 52.2: 2007 gives us the requirements for filter efficiency. Efficiency is determined by types of particles, rather than an overall efficiency. This rating is known as MERV—Minimum Efficiency Reporting Value and is in contrast to percent efficiency. MERV rates both how effective the filter is at stopping particles of […]