{"product_id":"dop-pre-filter-for-dri-eaz-defend-air-500-air-scrubber","title":"Dri-Eaz® F415 DOP Stage 2 Pre-Filter for DefendAir HEPA 500","description":"\u003cp\u003e\u003cstrong\u003eUpgrade the Dri-Eaz DefendAir HEPA 500 to a true high-efficiency, three-stage air filtration system with the addition of the DOP filter.\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWhen used with the standard pre-filter, DOP Stage 2 pre-filter, and the HEPA primary filter, the unit passes laboratory DOP testing conducted per ANSI standards—achieving a 99.97% efficiency rating against oily aerosol particles as small as 0.3 microns. This level of performance makes the HEPA 500 suitable for demanding environments that require first-pass, high-efficiency air filtration.\u003c\/p\u003e\n\u003cp\u003eDOP (Dispersed Oil Particulate) is a recognized standard test procedure used to measure HEPA filtration effectiveness. During this test, an extremely fine aerosolized particulate cloud is introduced under controlled conditions to verify filtration performance. DOP testing is commonly required on strict air-quality control projects.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUsage Notes:\u003c\/strong\u003e\u003cbr\u003e• Install the DOP filter between the standard pre-filter and the HEPA primary filter.\u003cbr\u003e• For enhanced odor removal, use the Activated Carbon Filter in place of the standard pre-filter together with the DOP filter.\u003cbr\u003e• Meets DOP test requirements when installed as part of a complete three-stage filtration system.\u003cbr\u003e• Expands the HEPA 500’s capability for environments requiring stringent first-pass HEPA filtration.\u003c\/p\u003e","brand":"Butler System Store","offers":[{"title":"Default Title","offer_id":47798441803933,"sku":"ZZEF415","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0752\/6839\/1069\/files\/ef415-dop-hepa-filter-for-hepa-500.jpg?v=1775116269","url":"https:\/\/shop.butlersystem.com\/products\/dop-pre-filter-for-dri-eaz-defend-air-500-air-scrubber","provider":"Butler Supply Co. ","version":"1.0","type":"link"}