{"product_id":"sentry-air-model-300-air-filters-hepa-ashrae-ulpa","title":"Sentry Air Model 300 Replacement Air Filters - HEPA \/ ASHRAE \/ ULPA","description":"\u003ch1\u003eMaintain clean, efficient airflow and dependable contaminant removal with Sentry Air Systems Model 300 Replacement Air Filters.\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eDesigned for use with Sentry Air Systems 300 Series portable fume extractors and air filtration systems, these high-efficiency replacement filters help capture smoke, dust, fumes, airborne particulates and other hazardous contaminants generated during industrial, laboratory and manufacturing processes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAvailable in \u003cstrong\u003eHEPA\u003c\/strong\u003e, \u003cstrong\u003eASHRAE\u003c\/strong\u003e and \u003cstrong\u003eULPA\u003c\/strong\u003e filtration configurations, Model 300 Replacement Filters allow users to select the appropriate level of filtration performance for their specific application and air quality requirements. These filters are commonly used in welding fume extraction, soldering applications, pharmaceutical environments, powder handling, laser marking operations and laboratory ventilation systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDesigned for Sentry Air Systems Model 300 Series including: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\u003ca href=\"..\/products\/30-portable-floor-sentry-fume-extractor\"\u003e\u003cstrong\u003ePortable Fume Extractors\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\u003ca href=\"..\/products\/wall-mounted-fume-extractor\"\u003e\u003cstrong\u003eWall Mounted Fume Extractors\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\u003ca href=\"https:\/\/sperdirect.com\/products\/40-ductless-fume-containment-hood-copy\"\u003e\u003cstrong\u003eBenchtop Fume Extractors\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\u003ca href=\"..\/products\/ductless-fume-containment-hood\"\u003e\u003cstrong\u003eDuctless Fume Hoods\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\u003cstrong\u003e\u003ca href=\"..\/products\/portable-clean-room\"\u003ePortable Clean Rooms\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for Sentry Air Systems Model 300 units\u003c\/li\u003e\n\u003cli\u003eAvailable in HEPA, ASHRAE and ULPA efficiencies\u003c\/li\u003e\n\u003cli\u003eHelps maintain optimal filtration performance\u003c\/li\u003e\n\u003cli\u003eCaptures smoke, dust, fumes and airborne particulates\u003c\/li\u003e\n\u003cli\u003eDurable construction for industrial applications\u003c\/li\u003e\n\u003cli\u003eEasy replacement installation\u003c\/li\u003e\n\u003cli\u003eSupports cleaner and safer work environments\u003c\/li\u003e\n\u003cli\u003eCompatible with a variety of portable extraction systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Options\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHEPA Filters\u003cbr\u003e\u003c\/strong\u003eHEPA filters are designed to capture 99.97% of particles at 0.3 microns, making them ideal for fine particulate removal in a wide range of industrial and laboratory applications. Typical applications include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSolder smoke extraction\u003c\/li\u003e\n\u003cli\u003eWelding fumes\u003c\/li\u003e\n\u003cli\u003eDust collection\u003c\/li\u003e\n\u003cli\u003ePharmaceutical processing\u003c\/li\u003e\n\u003cli\u003eGeneral particulate filtration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eASHRAE Filters\u003cbr\u003e\u003c\/strong\u003eASHRAE filters provide high-efficiency particulate filtration for applications where HEPA-level filtration may not be required. These filters offer an economical solution for capturing larger airborne contaminants while maintaining strong airflow performance. Typical applications include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGeneral dust collection\u003c\/li\u003e\n\u003cli\u003eLight industrial filtration\u003c\/li\u003e\n\u003cli\u003eEducational labs\u003c\/li\u003e\n\u003cli\u003eAirborne particulate control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eULPA Filters\u003cbr\u003e\u003c\/strong\u003eULPA filters provide ultra-high-efficiency filtration and are capable of capturing 99.999% of particles at 0.12 microns. These filters are ideal for critical environments requiring maximum particulate removal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaintenance Recommendations\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFor best performance, replace filters according to system usage, contaminant load and airflow reduction. Regular replacement helps:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMaintain filtration efficiency\u003c\/li\u003e\n\u003cli\u003eImprove airflow performance\u003c\/li\u003e\n\u003cli\u003eExtend equipment lifespan\u003c\/li\u003e\n\u003cli\u003eReduce airborne contaminant exposure\u003c\/li\u003e\n\u003cli\u003eSupport OSHA and workplace air quality requirements\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cspan\u003e\u003cb\u003eSpecifications\u003c\/b\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\" data-end=\"2917\" data-start=\"2546\"\u003e\n\u003cthead data-end=\"2573\" data-start=\"2546\"\u003e\n\u003ctr data-end=\"2573\" data-start=\"2546\"\u003e\n\u003cth style=\"text-align: left;\" class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"2562\" data-start=\"2546\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"text-align: left;\" class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"2573\" data-start=\"2562\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-end=\"2917\" data-start=\"2584\"\u003e\n\u003ctr data-end=\"2630\" data-start=\"2584\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2599\" data-start=\"2584\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2630\" data-start=\"2599\"\u003eReplacement Main Air Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2691\" data-start=\"2631\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2652\" data-start=\"2631\"\u003eCompatible Systems\u003c\/td\u003e\n\u003ctd data-end=\"2691\" data-start=\"2652\" data-col-size=\"sm\"\u003eSentry Air Systems Model 300 Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2733\" data-start=\"2692\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2709\" data-start=\"2692\"\u003eFilter Options\u003c\/td\u003e\n\u003ctd data-end=\"2733\" data-start=\"2709\" data-col-size=\"sm\"\u003eHEPA \/ ASHRAE \/ ULPA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2776\" data-start=\"2734\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2752\" data-start=\"2734\"\u003eHEPA Efficiency\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2776\" data-start=\"2752\"\u003e99.97% @ 0.3 Microns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eASHRAE Efficiency\u003c\/td\u003e\n\u003ctd\u003e95% @ 0.5 Microns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2821\" data-start=\"2777\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2795\" data-start=\"2777\"\u003eULPA Efficiency\u003c\/td\u003e\n\u003ctd data-end=\"2821\" data-start=\"2795\" data-col-size=\"sm\"\u003e99.999% @ 0.12 Microns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2859\" data-start=\"2822\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2837\" data-start=\"2822\"\u003eInstallation\u003c\/td\u003e\n\u003ctd data-end=\"2859\" data-start=\"2837\" data-col-size=\"sm\"\u003eDirect Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2917\" data-start=\"2860\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2879\" data-start=\"2860\"\u003eApplication Type\u003c\/td\u003e\n\u003ctd data-end=\"2917\" data-start=\"2879\" data-col-size=\"sm\"\u003eIndustrial, Laboratory, Commercial\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch4\u003e\n\u003cbr\u003eFilter Efficiency\u003c\/h4\u003e\n\u003ch3\u003eCalculating Filter Efficiency\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEfficiency of a filter is calculated by measuring the particle count downstream and upstream from the filter. \u003c\/strong\u003eThe downstream count is divided by the upstream count then this number is subtracted from one then multiplied by 100 to create an efficiency percentage with this formula:\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0356\/8248\/4360\/files\/filter-efficiency_480x480.png\" alt=\"Filter Efficiency Equation\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003ch3\u003eFilter Efficiency Comparison Chart\u003c\/h3\u003e\n\u003ctable height=\"259\" cellspacing=\".5\" cellpadding=\".5\" border=\".5\" style=\"width: 57.932264%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"300\" valign=\"center\" height=\"50\" align=\"center\" style=\"width: 52.86783%;\"\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eFilter\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"300\" valign=\"center\" height=\"50\" align=\"center\" style=\"width: 45.63591%;\"\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eEfficiency and Particle Size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"300\" valign=\"center\" height=\"50\" align=\"center\" style=\"width: 52.86783%;\"\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eASHRAE\u003c\/strong\u003e\u003cbr\u003eHigh Efficiency\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"300\" valign=\"center\" height=\"50\" align=\"center\" style=\"width: 45.63591%; text-align: left;\"\u003eUp to 95% on particles as small as 0.5 microns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"300\" valign=\"center\" height=\"50\" align=\"center\" style=\"width: 52.86783%;\"\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eHEPA\u003c\/strong\u003e\u003cbr\u003eHigher Efficiency | Industry Standard\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"300\" valign=\"center\" height=\"50\" align=\"center\" style=\"width: 45.63591%; text-align: left;\"\u003eUp to 99.97% on particles as small as 0.3 microns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"300\" valign=\"center\" height=\"50\" align=\"center\" style=\"width: 52.86783%;\"\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eULPA\u003c\/strong\u003e\u003cbr\u003eHighest Efficiency\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"300\" valign=\"center\" height=\"50\" align=\"center\" style=\"width: 45.63591%; text-align: left;\"\u003eUp to 99.9995% on particles as small as 0.12 microns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eParticle Sizes\u003c\/h3\u003e\n\u003cp\u003eTo illustrate the miniscule size of particles that these filters capture, one micron is equal to one millionth of a meter. The human eye cannot see particles smaller than 10 microns. Sizes of common particles are as follows:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHuman hair: 100-150 microns in diameter\u003c\/li\u003e\n\u003cli\u003eEmissions 1 – 150 microns\u003c\/li\u003e\n\u003cli\u003eDust: 100 microns\u003c\/li\u003e\n\u003cli\u003ePollen: 10 - 100 microns\u003c\/li\u003e\n\u003cli\u003eSpores: 3 - 40 microns\u003c\/li\u003e\n\u003cli\u003eMold 3 - 12 microns\u003c\/li\u003e\n\u003cli\u003eBacteria: 0.3 - 60 microns\u003c\/li\u003e\n\u003cli\u003ePure oxygen 0.005 microns\u003csup\u003e4\u003c\/sup\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv align=\"center\" style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0356\/8248\/4360\/files\/ParticleSize-chart.jpg\" alt=\"\"\u003e\u003c\/div\u003e\n\u003cdiv align=\"center\" style=\"text-align: left;\"\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"Sentry Air Systems","offers":[{"title":"SS-300-HF | HEPA Filter - Up to 99.97% Efficiency @ 0.3 Microns for Sentry Model 300 Series","offer_id":53489991909560,"sku":"SS-300-HF","price":252.0,"currency_code":"USD","in_stock":false},{"title":"SS-300-ULPA |  ULPA Filter - Up to 99.9995% Efficiency @ 0.12 Microns for Sentry Model 300 Series","offer_id":53489999151288,"sku":"SS-300-ULPA","price":368.0,"currency_code":"USD","in_stock":false},{"title":"SS-300-95A | ASHRAE Filter - Up to 95% Efficiency @ 0.5 Microns for Sentry Model 300 Series","offer_id":53497228001464,"sku":"SS-300-HF","price":252.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0532\/3735\/0584\/files\/hepa-300-filter.jpg?v=1779317431","url":"https:\/\/sperscientific.com\/products\/sentry-air-model-300-air-filters-hepa-ashrae-ulpa","provider":"Sper Scientific Instruments","version":"1.0","type":"link"}