{"product_id":"immunity-machine-filter","title":"Austin Air Immunity Machine Filter - FR444B","description":"\u003cdiv style=\"font-size: 18px; line-height: 1.6;\"\u003e\n\u003ch2 data-start=\"133\" data-end=\"622\"\u003eAustin Air Immunity Machine Filter - FR444B\u003c\/h2\u003e\n\u003cp data-start=\"133\" data-end=\"622\"\u003eThe Austin Air Immunity Machine Replacement Filter brings the power of our most advanced 8-phase filtration system to your existing standard model purifier. Engineered for individuals with heightened immune vulnerability, those living in new construction homes, or anyone exposed to modern chemical pollutants and viruses in high-traffic spaces like classrooms, clinics, and shared offices, this replacement filter upgrades your current unit to next-level protection.\u003c\/p\u003e\n\u003cp data-start=\"624\" data-end=\"925\"\u003eThis next-generation filter combines eight different types of filtration media—including medical-grade HEPA, military-grade HEGA carbon, and a four-part granular defense combo of carbon, impregnated carbon, mineral-based filtration, and impregnated mineral-based filtration—to remove the widest range of airborne threats.\u003c\/p\u003e\n\u003cp data-start=\"927\" data-end=\"1247\"\u003eUnlike traditional filters that primarily target particles, the Immunity Machine Replacement Filter is designed to capture and neutralize gases, VOCs, viruses, bacteria, and ultrafine particles, ensuring your air purifier continues to deliver comprehensive immune-supporting protection for your home or office.\u003c\/p\u003e\n\u003ch5\u003eWhat our Experts Think\u003c\/h5\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:27076455-598d-4764-bba0-57ab9e3b2b52-49\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:27076455-598d-4764-bba0-57ab9e3b2b52-49\" data-turn-id-container=\"request-WEB:27076455-598d-4764-bba0-57ab9e3b2b52-49\" data-testid=\"conversation-turn-52\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"381d702d-3e2a-4963-b896-f2f0f10c14ba\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-3-mini\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cul data-start=\"28\" data-end=\"1531\"\u003e\n\u003cli data-section-id=\"u4oytv\" data-start=\"28\" data-end=\"311\"\u003e\n\u003cstrong data-start=\"30\" data-end=\"65\"\u003ePremium OEM replacement filter:\u003c\/strong\u003e The FR444B is the official \u003cstrong data-start=\"93\" data-end=\"143\"\u003eAustin Air Immunity Machine replacement filter\u003c\/strong\u003e, designed for the Immunity Machine and compatible HealthMate Plus systems, ensuring full factory-grade performance restoration. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"rc0jwf\" data-start=\"313\" data-end=\"584\"\u003e\n\u003cstrong data-start=\"315\" data-end=\"358\"\u003eMedical-grade HEPA + carbon protection:\u003c\/strong\u003e Uses a \u003cstrong data-start=\"366\" data-end=\"395\"\u003e4-stage filtration system\u003c\/strong\u003e combining True HEPA (captures 99.97% of particles down to 0.3 microns) with activated carbon and zeolite for odors, VOCs, smoke, and chemical gases. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"xt8nna\" data-start=\"586\" data-end=\"839\"\u003e\n\u003cstrong data-start=\"588\" data-end=\"632\"\u003eHigh-level airborne contaminant capture:\u003c\/strong\u003e Built to handle \u003cstrong data-start=\"649\" data-end=\"723\"\u003eallergens, dust, mold spores, bacteria, smoke, and chemical pollutants\u003c\/strong\u003e, making it suitable for allergy-prone or high-exposure indoor environments. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"hh4exy\" data-start=\"841\" data-end=\"1071\"\u003e\n\u003cstrong data-start=\"843\" data-end=\"872\"\u003eLong service life design:\u003c\/strong\u003e Engineered for up to \u003cstrong data-start=\"894\" data-end=\"949\"\u003e~5 years of use under normal residential conditions\u003c\/strong\u003e, reducing replacement frequency and maintaining consistent air quality over time. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"9xwg0e\" data-start=\"1073\" data-end=\"1298\"\u003e\n\u003cstrong data-start=\"1075\" data-end=\"1110\"\u003eAdvanced multi-layer structure:\u003c\/strong\u003e Integrates pre-filter + HEPA core + heavy carbon\/zeolite media to balance \u003cstrong data-start=\"1185\" data-end=\"1238\"\u003eparticle filtration and strong gas\/VOC adsorption\u003c\/strong\u003e in one sealed unit. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"kc9x67\" data-start=\"1300\" data-end=\"1531\"\u003e\n\u003cstrong data-start=\"1302\" data-end=\"1352\"\u003eBest suited for high-sensitivity environments:\u003c\/strong\u003e Ideal for users needing \u003cstrong data-start=\"1377\" data-end=\"1413\"\u003emedical-grade indoor air quality\u003c\/strong\u003e, especially in homes with allergies, asthma, pets, or urban pollution exposure. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch5\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cp data-start=\"65\" data-end=\"365\"\u003e\u003cstrong data-start=\"65\" data-end=\"119\"\u003eQ1: What is the Austin Air FR444B filter used for?\u003c\/strong\u003e\u003cbr data-start=\"119\" data-end=\"122\"\u003eA: It is a \u003cstrong data-start=\"133\" data-end=\"167\"\u003egenuine OEM replacement filter\u003c\/strong\u003e designed for the \u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eAustin Air Immunity Machine\u003c\/span\u003e\u003c\/span\u003e and compatible HealthMate Plus units, used to maintain high-level indoor air purification performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"367\" data-end=\"649\"\u003e\u003cstrong data-start=\"367\" data-end=\"423\"\u003eQ2: What does the FR444B filter remove from the air?\u003c\/strong\u003e\u003cbr data-start=\"423\" data-end=\"426\"\u003eA: It uses a \u003cstrong data-start=\"439\" data-end=\"495\"\u003emulti-stage HEPA + activated carbon + zeolite system\u003c\/strong\u003e to capture \u003cstrong data-start=\"507\" data-end=\"588\"\u003edust, allergens, smoke, VOCs, odors, mold spores, and fine airborne particles\u003c\/strong\u003e down to 0.3 microns. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"651\" data-end=\"884\"\u003e\u003cstrong data-start=\"651\" data-end=\"687\"\u003eQ3: Is the FR444B a HEPA filter?\u003c\/strong\u003e\u003cbr data-start=\"687\" data-end=\"690\"\u003eA: Yes. It includes a \u003cstrong data-start=\"712\" data-end=\"746\"\u003emedical-grade True HEPA filter\u003c\/strong\u003e that captures \u003cstrong data-start=\"761\" data-end=\"797\"\u003e99.97% of particles ≥0.3 microns\u003c\/strong\u003e, ensuring high-efficiency particulate removal. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"886\" data-end=\"1104\"\u003e\u003cstrong data-start=\"886\" data-end=\"924\"\u003eQ4: How long does the filter last?\u003c\/strong\u003e\u003cbr data-start=\"924\" data-end=\"927\"\u003eA: It is designed for long-term use, typically \u003cstrong data-start=\"974\" data-end=\"1027\"\u003eup to 5 years under normal residential conditions\u003c\/strong\u003e, depending on air quality and usage. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1106\" data-end=\"1383\"\u003e\u003cstrong data-start=\"1106\" data-end=\"1160\"\u003eQ5: What makes it different from standard filters?\u003c\/strong\u003e\u003cbr data-start=\"1160\" data-end=\"1163\"\u003eA: Unlike basic filters, the FR444B combines \u003cstrong data-start=\"1208\" data-end=\"1258\"\u003eHEPA filtration + heavy carbon + zeolite media\u003c\/strong\u003e, providing stronger protection against both \u003cstrong data-start=\"1303\" data-end=\"1342\"\u003eparticles and chemical gases (VOCs)\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1385\" data-end=\"1606\"\u003e\u003cstrong data-start=\"1385\" data-end=\"1428\"\u003eQ6: Is it an OEM or aftermarket filter?\u003c\/strong\u003e\u003cbr data-start=\"1428\" data-end=\"1431\"\u003eA: It is a \u003cstrong data-start=\"1442\" data-end=\"1485\"\u003egenuine Austin Air OEM replacement part\u003c\/strong\u003e, ensuring proper fit, performance, and manufacturer-grade filtration efficiency. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1608\" data-end=\"1774\"\u003e\u003cstrong data-start=\"1608\" data-end=\"1643\"\u003eQ7: Who should use this filter?\u003c\/strong\u003e\u003cbr data-start=\"1643\" data-end=\"1646\"\u003eA: It is ideal for \u003cstrong data-start=\"1665\" data-end=\"1773\"\u003eallergy sufferers, asthma patients, pet owners, and users exposed to pollution, smoke, or chemical odors\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch5\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"1xzu0hz\" data-start=\"530\" data-end=\"634\"\u003e\n\u003cstrong data-start=\"532\" data-end=\"560\"\u003eReplace every 3–5 years:\u003c\/strong\u003e Change sooner in heavy pollution, smoke, or high-allergen environments.\u003c\/li\u003e\n\u003cli data-section-id=\"1a5g5u6\" data-start=\"635\" data-end=\"736\"\u003e\n\u003cstrong data-start=\"637\" data-end=\"676\"\u003eRun unit 24\/7 for best performance:\u003c\/strong\u003e Continuous airflow keeps HEPA and carbon media effective.\u003c\/li\u003e\n\u003cli data-section-id=\"1mbserw\" data-start=\"737\" data-end=\"828\"\u003e\n\u003cstrong data-start=\"739\" data-end=\"775\"\u003eVacuum pre-filter layer monthly:\u003c\/strong\u003e Reduces dust buildup and extends main filter life.\u003c\/li\u003e\n\u003cli data-section-id=\"uw6ouz\" data-start=\"829\" data-end=\"919\"\u003e\n\u003cstrong data-start=\"831\" data-end=\"859\"\u003eKeep intake vents clear:\u003c\/strong\u003e Ensure 360° airflow is not blocked by walls or furniture.\u003c\/li\u003e\n\u003cli data-section-id=\"lxg164\" data-start=\"920\" data-end=\"1007\"\u003e\n\u003cstrong data-start=\"922\" data-end=\"950\"\u003eAvoid moisture exposure:\u003c\/strong\u003e High humidity can reduce carbon adsorption efficiency.\u003c\/li\u003e\n\u003cli data-section-id=\"1tr0sl3\" data-start=\"1008\" data-end=\"1115\"\u003e\n\u003cstrong data-start=\"1010\" data-end=\"1042\"\u003eDo not wash or reuse filter:\u003c\/strong\u003e HEPA + carbon media are non-washable and permanently degrade when wet.\u003c\/li\u003e\n\u003cli data-section-id=\"1du943y\" data-start=\"1116\" data-end=\"1220\"\u003e\n\u003cstrong data-start=\"1118\" data-end=\"1146\"\u003eCheck odor breakthrough:\u003c\/strong\u003e If smells return (VOC\/smoke), it’s a sign carbon saturation is reached.\u003c\/li\u003e\n\u003cli data-section-id=\"l8wrz\" data-start=\"1221\" data-end=\"1318\"\u003e\n\u003cstrong data-start=\"1223\" data-end=\"1261\"\u003eUse in sealed rooms when possible:\u003c\/strong\u003e Improves CADR effectiveness and particle removal rate.\u003c\/li\u003e\n\u003cli data-section-id=\"1ht0fmr\" data-start=\"1319\" data-end=\"1400\"\u003e\n\u003cstrong data-start=\"1321\" data-end=\"1349\"\u003eReplace gasket properly:\u003c\/strong\u003e Ensures no air bypass around the filter housing.\u003c\/li\u003e\n\u003cli data-section-id=\"13qn4g9\" data-start=\"1401\" data-end=\"1508\"\u003e\n\u003cstrong data-start=\"1403\" data-end=\"1434\"\u003eStore spare filters sealed:\u003c\/strong\u003e Keep unopened filter in dry, cool conditions to preserve media integrity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Austin Air","offers":[{"title":"White","offer_id":45650589909183,"sku":"FR444B","price":521.99,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":45650589941951,"sku":"FR444A","price":521.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/5703\/0079\/files\/the-Austin-Air-immunity-machine-replacement-filter_fca15447-9969-4de9-ba9c-99eac1542447.jpg?v=1779274619","url":"https:\/\/www.mybackyardzone.com\/products\/immunity-machine-filter","provider":"Your Outdoor Setup Starts Here","version":"1.0","type":"link"}