{"product_id":"replacement-merv-11-3m-filtrete-pre-filter","title":"3M Filtrete Pre-Filter 41144","description":"\u003ch3 dir=\"ltr\" bis_size='{\"x\":11,\"y\":9,\"w\":558,\"h\":29,\"abs_x\":11,\"abs_y\":9}'\u003e\u003cspan bis_size='{\"x\":11,\"y\":11,\"w\":388,\"h\":24,\"abs_x\":11,\"abs_y\":11}'\u003eProtect your HEPA. Keep airflow strong.\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul bis_size='{\"x\":11,\"y\":52,\"w\":558,\"h\":117,\"abs_x\":11,\"abs_y\":52}'\u003e\n\u003cli dir=\"ltr\" role=\"presentation\" bis_size='{\"x\":51,\"y\":52,\"w\":518,\"h\":39,\"abs_x\":51,\"abs_y\":52}'\u003e\n\u003cspan bis_size='{\"x\":51,\"y\":54,\"w\":164,\"h\":16,\"abs_x\":51,\"abs_y\":54}'\u003eOEM 3M Filtrete pre‑filter\u003c\/span\u003e\u003cspan bis_size='{\"x\":216,\"y\":54,\"w\":50,\"h\":16,\"abs_x\":216,\"abs_y\":54}'\u003e for the \u003c\/span\u003e\u003cspan bis_size='{\"x\":267,\"y\":54,\"w\":31,\"h\":16,\"abs_x\":267,\"abs_y\":54}'\u003eXJ‑2\u003c\/span\u003e\u003cspan bis_size='{\"x\":298,\"y\":54,\"w\":201,\"h\":16,\"abs_x\":298,\"abs_y\":54}'\u003e negative‑pressure HEPA unit—\u003c\/span\u003e\u003cspan bis_size='{\"x\":51,\"y\":54,\"w\":473,\"h\":36,\"abs_x\":51,\"abs_y\":54}'\u003epart #41144\u003c\/span\u003e\u003cspan bis_size='{\"x\":99,\"y\":73,\"w\":4,\"h\":16,\"abs_x\":99,\"abs_y\":73}'\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\" bis_size='{\"x\":51,\"y\":92,\"w\":518,\"h\":39,\"abs_x\":51,\"abs_y\":92}'\u003e\n\u003cspan bis_size='{\"x\":51,\"y\":93,\"w\":41,\"h\":16,\"abs_x\":51,\"abs_y\":93}'\u003eRated \u003c\/span\u003e\u003cspan bis_size='{\"x\":93,\"y\":93,\"w\":170,\"h\":16,\"abs_x\":93,\"abs_y\":93}'\u003e80–85% ASHRAE efficient\u003c\/span\u003e\u003cspan bis_size='{\"x\":264,\"y\":93,\"w\":174,\"h\":16,\"abs_x\":264,\"abs_y\":93}'\u003e to capture larger particles \u003c\/span\u003e\u003cspan bis_size='{\"x\":438,\"y\":93,\"w\":41,\"h\":16,\"abs_x\":438,\"abs_y\":93}'\u003ebefore\u003c\/span\u003e\u003cspan bis_size='{\"x\":51,\"y\":93,\"w\":496,\"h\":36,\"abs_x\":51,\"abs_y\":93}'\u003e the HEPA, extending service life.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\" bis_size='{\"x\":51,\"y\":131,\"w\":518,\"h\":39,\"abs_x\":51,\"abs_y\":131}'\u003e\n\u003cspan bis_size='{\"x\":51,\"y\":132,\"w\":212,\"h\":16,\"abs_x\":51,\"abs_y\":132}'\u003eChange when the gauge says so:\u003c\/span\u003e\u003cspan bis_size='{\"x\":264,\"y\":132,\"w\":100,\"h\":16,\"abs_x\":264,\"abs_y\":132}'\u003e use the XJ‑2’s \u003c\/span\u003e\u003cspan bis_size='{\"x\":365,\"y\":132,\"w\":66,\"h\":16,\"abs_x\":365,\"abs_y\":132}'\u003eMinihelic®\u003c\/span\u003e\u003cspan bis_size='{\"x\":51,\"y\":132,\"w\":500,\"h\":36,\"abs_x\":51,\"abs_y\":132}'\u003e pressure gauge or noticeable airflow drop to know it’s time.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 bis_size='{\"x\":11,\"y\":239,\"w\":558,\"h\":45,\"abs_x\":11,\"abs_y\":239}'\u003e\n\u003cspan bis_size='{\"x\":11,\"y\":240,\"w\":431,\"h\":18,\"abs_x\":11,\"abs_y\":240}'\u003eThe 3M Filtrete prefilter protects the HEPA filter and is \u003c\/span\u003e\u003cspan bis_size='{\"x\":11,\"y\":240,\"w\":499,\"h\":41,\"abs_x\":11,\"abs_y\":240}'\u003e80-85% ASHRAE Efficient\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp bis_size='{\"x\":11,\"y\":296,\"w\":558,\"h\":97,\"abs_x\":11,\"abs_y\":296}'\u003e\u003cspan bis_size='{\"x\":11,\"y\":297,\"w\":556,\"h\":95,\"abs_x\":11,\"abs_y\":297}'\u003eDirty air passes through the prefilter. The prefilter removes large particulate. The primary filter then captures the remaining particulate. As the contaminant load on the filters increases, the filters become more efficient in capturing the smaller particles. At the same time, however, the dirty filter allows less air to pass through resulting in less particle collection and a decrease in the overall effectiveness of the air cleaner. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp bis_size='{\"x\":11,\"y\":409,\"w\":558,\"h\":97,\"abs_x\":11,\"abs_y\":409}'\u003e\u003cspan bis_size='{\"x\":11,\"y\":411,\"w\":546,\"h\":95,\"abs_x\":11,\"abs_y\":411}'\u003e\u003cstrong bis_size='{\"x\":11,\"y\":411,\"w\":546,\"h\":75,\"abs_x\":11,\"abs_y\":411}'\u003eThe XJ-2 air cleaner is equipped with a pressure gauge which indicates the restriction to airflow caused by the filters loading with particulate. When the air filter gauge reaches the red arrow or a noticeable reduction in airflow occurs, it is time to clean or replace the prefilter and possibly the primary filter.\u003c\/strong\u003e The CDC guidelines specify that the HEPA filter shall be replaced every six months.\u003c\/span\u003e\u003cspan bis_size='{\"x\":11,\"y\":524,\"w\":180,\"h\":18,\"abs_x\":11,\"abs_y\":524}'\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"974\" data-end=\"990\"\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"993\" data-end=\"1043\"\u003eCaptures larger particles before the HEPA filter\u003c\/li\u003e\n\u003cli data-start=\"1046\" data-end=\"1085\"\u003eHelps extend HEPA filter service life\u003c\/li\u003e\n\u003cli data-start=\"1088\" data-end=\"1140\"\u003eMaintains consistent airflow and system efficiency\u003c\/li\u003e\n\u003cli data-start=\"1143\" data-end=\"1193\"\u003eSupports cleaner operation in dusty environments\u003c\/li\u003e\n\u003cli data-start=\"1196\" data-end=\"1236\"\u003eGenuine 3M™ Filtrete™ filtration media\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Air Quality Engineering","offers":[{"title":"Default Title","offer_id":32269102055495,"sku":"41144","price":99.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0104\/6462\/4698\/products\/xj2-replacement-3m-filtrete-pre-filter-for-xj-2-negative-pressure-filtration-system-41144-pure-n-natural-systems-719497.jpg?v=1749225858","url":"https:\/\/purennatural.com\/products\/replacement-merv-11-3m-filtrete-pre-filter","provider":"Pure n Natural Systems","version":"1.0","type":"link"}