ASHRAE 52.2, method of testing general ventilation air-cleaning devices used for removal effciency
ASHRAE
1999
ASHRAE, (1999), "ASHRAE 52.2, method of testing general ventilation air-cleaning devices used for removal effciency", .
Abstract: |
"This standard addresses air cleaner performance characteristics of importance to the users; the ability of a device to remove particles -from the airstream and it's resistance to airflow. Air cleaner testing is conducted at airflow rates of not less than 510 cfm nor greater than 3180 cfm. A sample of air from a general ventilation system contains particles with a broad range of sizes having varied effects, sometimes dependent on particle size. Coarse particles for example, cause energy waste when they cover heat transfer surfaces. Fine particles cause soiling and discoloration of interior surfaces and furnishings as well as possible health effects when inhaled by occupants of the space. When air cleaners are tested and rated for efficiency in accordance with this standard, there is a basis for comparison and selection for specific tasks. The test procedure uses laboratory generated potassium chloride particles dispersed into the airstream as the test aerosol. "A particle counter measures and counts the particles in 12 size ranges both upstream and downstream for the efficiency determinations." -- by Paul F. Johnstone |
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