ASHRAE Standard 52.2 (“Method of Testing General Ventilation Air Cleaning Devices for Removal Efficiency by Particle Size”) will require the air filter industry and the user community to start thinking differently about filter efficiency. The Standard has been through many revisions since the first ASHRAE research project in 1992 that developed a new method of testing. This article will review the major differences between the test methods of ASHRAE 52.1 and ASHRAE 52.2 to help those in the industry begin educating those in the user community.
Question #2: From the enduser’s viewpoint, will ASHRAE 52.2 be: