air filter arrestance definition
This paper deals with ASHRAE filters used in air filtration. applications and summarizes, on the basis of current research. work, some of the reasons for the disagreement that exists. among filter manufacturers concerning the properties and. performance of various types of air filter media in general, glass and synthetic media in particular. Standard Test Airflow Rates. The Minimum Efficiency Reporting Value (MERV) must be stated with the air velocity at which the filter was tested. For example, if the filter was tested with an air velocity of 492 FPM and was found to be MERV 8, the filter’s Minimum Efficiency Reporting Value would be MERV 8 @ 492 FPM. Technical Services Bulletin. ASHRAE Testing for HVAC Air Filtration. A Review of Standards 52.1-1992 & 52.2-1999. The American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE) publishes two different Standards that allow. users to evaluate air filters to be applied in an. HVAC system. 'HEPA - High Efficiency Particulate Arrestance', All Acronyms, 13 April 2017, <https://www.allacronyms.com/HEPA/High_Efficiency_Particulate_Arrestance> [accessed 13 April 2017] These units filter the air passing through them at a very fine scale. The U.S. Department of Energy (DOE) and its contractors use HEPA filters that meet DOE standard STD-3020-97, Specification for HEPA Filters Used by DOE Contractors, to filter 99.97 percent of all particles 0.3 microns or larger. The Three Types of Air Filters. The air-filtration industry has seen its share of changes over the last decade. Manufacturers have created new products that not only have improved indoor air quality (IAQ) but also have reduced the cost of installing and operating air-filtration equipment in commercial and institutional facilities. HEPA Definition. HEPA stands for High Efficiency Particulate Arrestance. The “arrestance” term is sometimes referred to as “air”. So, High Efficiency Particulate Air. HEPA is just a type of air filter. HEPA filter media is commonly made from synthetic fibers and in some cases glass fibers. An “overall” reporting value of a 52.2-evaluated air filter is the expression of the Minimum Efficiency Reporting Value (MERV). The MERV is a single number that is used, along with the air velocity at which the test was performed, to simplify the extensive data generated by the method of testing. Washable air filters. These products are not as common and rely on the build-up of dust along the cloth to improve the efficiency of the filter. Industrial processes involving high volumes of coarse dust are typical applications. Air Filter Arrestance. Arrestance is a measure of the ability of an air filtration device to remove synthetic dust from the air. The arrestance describes how well an air filter removes larger particles - such as dirt, lint, hair, and dust. ASHRAE arrestance is a measure of the ability of a device to remove ASHRAE dust from test air.
A measure of the ability of an air filtration device to remove synthetic dust from the air.