Sentry Air Systems High Efficiency Filters
To filter out harmful particulates and carcinogenic fumes, fume extractors and air purification systems utilize HEPA, ASHRAE, and ULPA to remove these respirable pollutants from the air. Unlike typical filters, high efficiency air filters are made of a complex web of fibers composed of dense glass, and pleated, similar to an accordion, which increases the total surface area and creates lower resistance to airflow. Due to the lower resistance, these filters are recommended for applications that require high efficiency to remove particulates with a size of less than 0.6 microns.
All Sentry Air Systems ASHRAE, HEPA and ULPA filters are 100% fire retardant, polyalphaolefin (PAO) batch tested, feature unabridged gasket closed cell neoprene and have multi-level quality assurance.
Filter Efficiency Comparison Chart
ASHRAE Filters - High Efficiency
An ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) filter refers to a fibrous filter that has efficiency up to 95% on particles as small as 0.5 microns. The MERV efficiency rating is 14 for this filter and can be used to capture bacteria, pollen, spores, and other harmful particulates.
HEPA Filters - Higher Efficiency
High efficiency particulate air (HEPA) filters must meet the efficiency rating of 99.97%, on particles as small as 0.3 microns, set by the US Department of Energy to be a true HEPA filter. HEPA filters have a MERV rating of 17 and provide excellent filtration for bacteria, lung damaging dust, spores, pollen, pulverized coal, and metallurgical dust and fumes.
ULPA Filters - Highest Efficiency
Ultra-low particulate air (ULPA) filters have efficiency of up to 99.9995% on particles as small as 0.12 microns. ULPA filters have a MERV rating of 20 and are the highest quality filters available. ULPA filters provide better filtration for tobacco smoke, oil smoke, insecticide dust, carbon dust, and even capture some viruses.
Activated Carbon Filters
Activated carbon filters, or activated charcoal filters, can remove volatile organic compounds when HEPA filters alone don’t work adequately. Fumes from painting and cleaning products as well as cigarette smoke can be removed with an activated carbon filter. However, to remove particulate and chemical fumes, activated carbon filters should be used in conjunction with HEPA filters to provide the best solution.
Pre-filters
Pre-filter pad replacements help the filtration system capture and remove harmful particulates emitted from different processes. Also available, Activated Carbon pre-filters which also help remove harmful fumes and odors emitted from different processes. The pre-filter is used in conjunction with a HEPA, ASHRAE, ULPA, Activated Carbon, or specialty-blended filter.
Looking for Specialty Blended Filters, give us a call at 800-878-2822.