{"product_id":"the-fourth-pro-xiaomi-4-pro-replacement-filter","title":"The Fourth Pro | Replacement Filter for Xiaomi Air Purifier 4 Pro","description":"\u003cdiv class=\"product-narrative\"\u003e\n\u003cp\u003eAn air purifier is a fan in a box with a filter in front of it. Everything the machine does well or badly comes down to that filter, and the filter is the part owners replace least often and think about least. The Fourth Pro is a direct replacement cartridge for the Xiaomi Mi Air Purifier 4 Pro, built from activated carbon and HEPA media in the same 226 by 226 by 360 millimetre form factor, so it seats into the housing without modification and without an adapter ring.\u003c\/p\u003e\n\u003cp\u003eThe green variant is tuned for formaldehyde rather than dust alone, which is a distinction worth understanding. Standard HEPA media catches particles: PM2.5, pollen, pet dander, mould spores. It does not catch formaldehyde, benzene or the volatile organic compounds that off-gas from new furniture, fresh paint and laminate flooring, because those are gases and pass straight through a particle filter. The activated carbon layer is what adsorbs them, and the quantity and grade of that carbon is the difference between a filter that removes odours and one that actually reduces VOC load in a newly decorated room.\u003c\/p\u003e\n\u003cp\u003eThe rated clean air delivery rate is 398 cubic metres per hour, which is the figure that matters when you size the machine against a room rather than against a marketing claim. In practice that is a living room or an open plan kitchen of thirty to fifty square metres running at a mid fan speed, and it means the filter is not the bottleneck in a correctly sized installation. The cartridge fits the 4 Pro body only, so check the model number before ordering, since the 4 and 4 Lite use different housings.\u003c\/p\u003e\n\u003cp\u003eReplacement interval depends on use, not on a calendar. A filter running continuously in a city flat with a window onto a main road will load faster than one in a rural bedroom used at night, and the machine's own filter-life indicator is the reliable signal. When airflow drops audibly at the same fan setting, or when the cartridge has visibly greyed across the pleats, the media is done regardless of what the percentage says.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eClean air is not a feature you switch on. It is a filter you remember to change.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-features\"\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"list-style:none;padding:0;\"\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eDirect fit for the 4 Pro\u003c\/strong\u003e 226 by 226 by 360 millimetres, seating into the Mi Air Purifier 4 Pro housing without adapters or trimming.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eActivated carbon plus HEPA\u003c\/strong\u003e Two media in one cartridge, particle capture and gas adsorption in the same airflow path.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eGreen variant for formaldehyde\u003c\/strong\u003e Tuned for new-build and renovation VOCs rather than dust alone, which is what most replacement filters ignore.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003e398 cubic metres per hour CADR\u003c\/strong\u003e Enough throughput for a living room or open plan kitchen without the filter becoming the restriction.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003ePM2.5, pollen and dander\u003c\/strong\u003e The particle side of the job, which is what shows up as the visible grey line across the pleats over time.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eBacteria and mould spore capture\u003c\/strong\u003e HEPA media traps spores rather than recirculating them, useful in damp rooms and basements.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eOdour reduction\u003c\/strong\u003e Carbon adsorbs cooking smells, pet odour and tobacco smoke rather than masking them.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eSealed cartridge construction\u003c\/strong\u003e One unit, no loose carbon to spill, no separate pre-filter to remember.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul style=\"list-style:none;padding:0;\"\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eCompatible model:\u003c\/strong\u003e Xiaomi Mi Air Purifier 4 Pro\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Air purifier replacement filter cartridge\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 226 x 226 x 360 millimetres\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Activated carbon and HEPA\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eVariant:\u003c\/strong\u003e Green, formaldehyde-focused\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eCADR:\u003c\/strong\u003e 398 cubic metres per hour\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eTargets:\u003c\/strong\u003e PM2.5, dust, pollen, allergens, bacteria, formaldehyde\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eHousing:\u003c\/strong\u003e Sealed cartridge, drop-in replacement\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Filterhualv\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e One cartridge\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eCare:\u003c\/strong\u003e Vacuum the outer face monthly, replace when airflow drops\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eDisposal:\u003c\/strong\u003e Household waste, media is not hazardous\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-applications\"\u003e\n\u003ch3\u003eWhere It Belongs\u003c\/h3\u003e\n\u003cp\u003eThis belongs in a bedroom, a living room, a home office or a rented flat where the windows face a road. It suits the owner of a 4 Pro who has reached the filter-change prompt and does not want to order a cartridge from overseas and wait three weeks, and it suits anyone moving into a newly renovated property where formaldehyde from new joinery and paint is the real concern rather than pollen. It is also the sensible spare to keep in a cupboard, so a filter change does not mean a week of reduced airflow.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-faq\"\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this fit the standard Xiaomi 4?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: No. This cartridge is shaped for the 4 Pro. The 4 and the 4 Lite use different housings and different filter part numbers, so check the model printed on the back of your machine before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should it be replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Every six to twelve months in typical domestic use. The machine's filter-life indicator is the guide, but audible airflow loss at the same fan setting is the more honest signal that the media is loaded.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between the colour variants?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Blue is the standard particle filter, green adds formaldehyde removal for new decoration, and purple targets sterilisation and anti-mould. Green is the one to choose if the room has new furniture, paint or flooring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does it remove cooking smells?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Partially, and better than a particle-only filter, because the carbon layer adsorbs odours. For heavy kitchen use, run the purifier on a higher fan speed during cooking rather than expecting the filter to clear a room afterwards.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I vacuum the filter instead of replacing it?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: You can vacuum the outer face monthly to remove loose dust, and that extends service life. It does not restore the carbon, which is consumed by the gases it adsorbs, so vacuuming delays replacement rather than replacing it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is it a genuine Xiaomi part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: It is a Filterhualv cartridge made to the 4 Pro specification, not a Xiaomi-branded part. It fits and performs to the same dimensions and CADR rating at a lower price than the branded cartridge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does it come with a pre-filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: No separate pre-filter is included. The 4 Pro has its own washable outer mesh, which is the part you rinse, and this cartridge sits behind it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-promise\"\u003e\n\u003ch3\u003eThe EastSupplier Promise\u003c\/h3\u003e\n\u003cp\u003eEvery unit ships from inspected stock held by our own team, not from a blind dropship queue. Orders placed before 3pm warehouse time leave the same working day, and each parcel carries a tracking number you can follow from dispatch to doorstep. If a unit arrives damaged or does not match this listing, we replace or refund it inside 30 days.\u003c\/p\u003e\n\u003cul style=\"list-style:none;padding:0;\"\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eStock checked daily:\u003c\/strong\u003e the inventory figure on this page is live, not a placeholder.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eTechnical answers in English:\u003c\/strong\u003e a human replies to product questions within one business day.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eNo surprise fees:\u003c\/strong\u003e the price you see is the price at checkout.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-gallery\" style=\"margin-top:30px;text-align:center;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S7b41115917604b5d99cad4860d18c0cfN.webp?v=1717545993\" alt=\"The Fourth Pro | Replacement Filter for Xiaomi Air Purifier 4 Pro\" style=\"max-width:100%;height:auto;margin:4px 0;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S7bc86e291c1a41a58194413cdcdfeb0fN.webp?v=1717545992\" alt=\"The Fourth Pro | Replacement Filter for Xiaomi Air Purifier 4 Pro\" style=\"max-width:100%;height:auto;margin:4px 0;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sc90a1ed238e741348eac2241c643da44l.webp?v=1717545992\" alt=\"The Fourth Pro | Replacement Filter for Xiaomi Air Purifier 4 Pro\" style=\"max-width:100%;height:auto;margin:4px 0;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S7b351b3ae71a4fe584bf41533dda33c32.webp?v=1717545993\" alt=\"The Fourth Pro | Replacement Filter for Xiaomi Air Purifier 4 Pro\" style=\"max-width:100%;height:auto;margin:4px 0;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S2e35db463d06428bb3ed5d1e1d249c68b.webp?v=1717545992\" alt=\"The Fourth Pro | Replacement Filter for Xiaomi Air Purifier 4 Pro\" style=\"max-width:100%;height:auto;margin:4px 0;\" loading=\"lazy\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S72f23034f2a742a388f2a597ee581b3b7.webp?v=1717545992\" alt=\"The Fourth Pro | Replacement Filter for Xiaomi Air Purifier 4 Pro\" style=\"max-width:100%;height:auto;margin:4px 0;\" loading=\"lazy\"\u003e\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"The Fourth Pro | Replacement Filter for Xiaomi Air Purifier 4 Pro\",\"brand\":{\"@type\":\"Brand\",\"name\":\"EastSupplier\"},\"url\":\"https:\/\/eastsupplier.com\/products\/the-fourth-pro-xiaomi-4-pro-replacement-filter\",\"offers\":{\"@type\":\"Offer\",\"price\":\"122.33\",\"priceCurrency\":\"USD\",\"availability\":\"https:\/\/schema.org\/InStock\",\"url\":\"https:\/\/eastsupplier.com\/products\/the-fourth-pro-xiaomi-4-pro-replacement-filter\"},\"aggregateRating\":{\"@type\":\"AggregateRating\",\"ratingValue\":\"4.6\",\"reviewCount\":\"3\"}}\u003c\/script\u003e","brand":"East Supplier Platform","offers":[{"title":"Green","offer_id":45928904523999,"sku":"1005006315085293-Green","price":122.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S7b41115917604b5d99cad4860d18c0cfN.webp?v=1717545993","url":"https:\/\/eastsupplier.com\/en-pt\/products\/the-fourth-pro-xiaomi-4-pro-replacement-filter","provider":"EastSupplier Platform","version":"1.0","type":"link"}