Which standard defines the testing method for air filter efficiency?

The standard that defines the testing method for air filter efficiency is ASHRAE Standard 52.2. This standard specifies the procedures for testing the filtration efficiency of air-cleaning devices for general ventilation, particularly measuring how effectively filters can capture airborne particles of varying sizes.

ASHRAE Standard 52.2 utilizes a standardized protocol to assess filter performance, which includes a quantifiable method for determining how much particulate matter is removed from the air passing through the filter. This standard provides different efficiency ratings based on the size of particles that are being filtered, which helps in comparing the performance of different air filters under consistent testing conditions.

Understanding this standard is critical for professionals in the air filtration industry, as it establishes a benchmark for the efficiency and effectiveness of air filters, aiding in the selection of appropriate filters for specific applications based on their efficiency ratings.