About how often should I replace the filter in a Xiaomi air purifier?

Original filters are mostly labeled for about 6 to 12 months, but the real life depends a lot on air quality, hours of use, and room size. In places with heavy air pollution, or if it runs all day, you may need to replace it within a few months. It is best to go by the remaining filter percentage shown on the panel, and not to memorize a number of months.

What happens if I install a third-party filter without an RFID chip?

The filtering itself is not affected, but the panel may show a "please use an original filter" message, and the remaining filter life does not reset and count again by itself, so you have to note down the replacement date yourself. A third-party filter with an RFID chip shows the life normally and does not show the message.

Will a third-party filter damage the machine or affect the warranty?

The filter itself is a consumable, and replacing it with a third-party one generally does not affect the warranty on the purifier's hardware. But if the purifier itself breaks, the maker may ask when assessing it whether you used third-party consumables. When you buy, the filter grade (such as H13 medical-grade HEPA) and whether the maker has third-party testing (such as SGS) matter more than comparing prices alone.

How to Choose Xiaomi / Mi Home Air Purifier Filters (小米空氣清淨機濾網) in Taiwan: Antibacterial, Formaldehyde, Economy, and RFID

Last updated: October 23, 2026

Xiaomi and Mi Home (米家) air purifiers (Gen 1, Gen 2, Gen 3, 2S, and Pro) use the same filter size. There are many third-party (non-original) filters, but the version names are often confusing. This guide separates the "antibacterial", "formaldehyde-removal", and "economy" versions from the question of whether there is an RFID chip, so you can match the version to your own needs. It does not push any single brand.

First, When Should You Replace the Filter?

An air purifier's filter collects dust and hair over time, and its filtering efficiency and airflow both drop. Most models show a "remaining filter life" percentage on the panel. This number is more accurate than trying to remember "replace it every so many months". In places with heavy air pollution, in homes with pets, or if the purifier runs almost all day, the filter wears out much faster than in an ordinary home.

Comparing the 3 Versions

Version	Filter grade	Antiviral / antibacterial	Formaldehyde removal	Who it is for
Antibacterial (purple)	H13 medical grade	Yes	No	Homes with allergies, asthma, young children, or pets, where limiting germs matters
Formaldehyde-removal (blue)	H13 medical grade	No	Yes (a separate formaldehyde-removal inner cylinder)	New renovation or new furniture, where formaldehyde and volatile organic compounds matter
Economy (green)	H13 medical grade	No	No	People who simply want basic filtering and dust removal, and put budget first

The filter grade is usually the same in all three versions, and the difference is in the extra functions. Original filters are mostly H11 grade (basic antibacterial). If a third-party filter says H13 medical grade, it means it goes a step further in filtering fine particles.

With or Without an RFID Chip: What Is the Difference?

With an RFID chip: the purifier recognizes the filter correctly once installed, the panel shows the remaining filter life correctly, and it does not show a "please use an original filter" message.
Without an RFID chip: the filtering itself is not affected, but the purifier cannot recognize the filter automatically, so the panel may show a message, and the filter life does not reset and start counting down by itself. You have to note down the replacement date yourself.

The same style is usually sold in both a with-RFID and a without-RFID version, with the with-RFID one a little more expensive. If you care about the panel message or do not want to track the replacement date yourself, the with-RFID version is less trouble.

Choosing by Situation

Allergic children, asthma, or pets at home — Look first at the antibacterial version, which strengthens germ control and filtering of fine particles.
Just finished a renovation, bought new furniture, or you care about the formaldehyde smell — Choose the formaldehyde-removal version, which has an extra formaldehyde-removal inner cylinder.
You just want to keep the machine working at a basic level with regular replacement — The economy version is enough. Its filter grade is H13, the same as the other versions.
You do not want to keep seeing messages on the machine, and want to track filter life accurately — Choose a version with an RFID chip.
You need to buy several sets at once to stock up — Check the shop's delivery limits (some shops allow only 2 sets per convenience-store order, and more than that needs home delivery) before you order.

Searching on Shopee Taiwan: Chinese Keywords and What They Mean

Shopee Taiwan uses Chinese, so searching in English usually returns nothing useful. Copy the keywords below and paste them into the Shopee search box.

Keyword / text (Chinese)	Pinyin	Meaning	What it is for
小米空氣清淨機濾網	Xiǎomǐ kōngqì qīngjìngjī lǜwǎng	Xiaomi air purifier filter	The most common search keyword
濾芯	lǜxīn	filter cartridge	Another name for the filter
米家	mǐjiā	Mi Home	Xiaomi's home product line
抗菌版	kàngjūn bǎn	antibacterial version	For allergies, asthma, young children, or pets
除甲醛	chú jiǎquán	formaldehyde removal	For new renovation or new furniture
經濟版	jīngjì bǎn	economy version	Basic filtering, lower price
含 RFID 晶片	hán RFID jīngpiàn	with RFID chip	The purifier recognizes the filter and shows its life
副廠	fùchǎng	third-party (non-original)	Made by a company other than the maker of the purifier
1代 2代 3代 2S Pro	yī dài / èr dài / sān dài / 2S / Pro	Gen 1 / Gen 2 / Gen 3 / 2S / Pro	Check that the filter fits your model
免運	miǎnyùn	free shipping	There is usually a minimum order amount
月銷熱賣	yuè xiāo rèmài	best sellers this month	A sorting option in Shopee Taiwan search results (the display name may change), useful for finding what many people buy

Brand names on packaging are usually in Chinese too. If you are not sure, use your phone's camera translation (for example Google Translate) on the packaging or the product page and compare it with the table above. This list is only a keyword guide, not an official translation, and the text on a product page may differ.

Show this to the shop staff, or paste it into the Shopee chat

請問這個濾芯適用小米空氣清淨機第 ___ 代嗎？

Qǐngwèn zhège lǜxīn shìyòng Xiǎomǐ kōngqì qīngjìngjī dì ___ dài ma?

Does this filter fit the Xiaomi air purifier, Gen ___?

請問有含 RFID 晶片的嗎？

Qǐngwèn yǒu hán RFID jīngpiàn de ma?

Do you have one with an RFID chip?

請問一次買兩組可以超商取貨嗎？

Qǐngwèn yīcì mǎi liǎng zǔ kěyǐ chāoshāng qǔhuò ma?

Can I buy two sets at once and pick them up at a convenience store?

This page is a consumer guide, not a paid review of a specific product. The link below is a Shopee affiliate link. If you buy through it, we may receive a small commission. The price you pay does not change.

Our pick

Yiyue HEPA Filter (fits Xiaomi Gen 1 / Gen 2 / Gen 3 / 2S / Pro)

Made in Taiwan, with RFID chip versions available, and H13 medical-grade HEPA. The antibacterial version claims to be 99.9% antiviral and antibacterial and to filter 99.99% of fine particles (certified by the SGS Osaka microbiology laboratory; we only quote these claims and have not checked them one by one). No. 1 in the Shopee Mall best-seller list for "Mi Home air purifier filter", with 100,000+ sold, 42,000 reviews, and a 5-star rating. A single set also comes in the formaldehyde-removal and economy versions, with or without RFID, for 8 options in all.

View product / buy on Shopee →

Quick Checklist Before You Buy

First confirm your model (Gen 1, Gen 2, Gen 3, 2S, or Pro), because the filter size has to match
Allergies, asthma, or pets at home? → Look first at the antibacterial version
Just renovated, or care about formaldehyde? → Choose the formaldehyde-removal version
Do not want to see panel messages and want to track filter life accurately? → Choose a version with an RFID chip
Buying several sets at once? → Check the shop's delivery limits first, so you do not find out after ordering that you need home delivery

Frequently Asked Questions

About how often should I replace the filter in a Xiaomi air purifier?: Original filters are mostly labeled for about 6 to 12 months, but the real life depends a lot on air quality, hours of use, and room size. In places with heavy air pollution, or if it runs all day, you may need to replace it within a few months. It is best to go by the remaining filter percentage shown on the panel, and not to memorize a number of months.
What happens if I install a third-party filter without an RFID chip?: The filtering itself is not affected, but the panel may show a "please use an original filter" message, and the remaining filter life does not reset and count again by itself, so you have to note down the replacement date yourself. A third-party filter with an RFID chip shows the life normally and does not show the message.
Will a third-party filter damage the machine or affect the warranty?: The filter itself is a consumable, and replacing it with a third-party one generally does not affect the warranty on the purifier's hardware. But if the purifier itself breaks, the maker may ask when assessing it whether you used third-party consumables. When you buy, the filter grade (such as H13 medical-grade HEPA) and whether the maker has third-party testing (such as SGS) matter more than comparing prices alone.