What Air Purifier Do You Use?

NovaAlpha on 04/08/2026 - 22:25
Last edited 04/08/2026 - 22:30

I have four Xiaomi Air Purifier 4 around the house and the filters for this isn't really cheap, it's about $50 (with the PBTech membership discount) and I find it cheaper and easier to get it from PBTech. I usually get either of these 3 filters, depending on the situation:

https://www.pbtech.co.nz/product/HOMOEM03001/OEM-High-Effici…
https://www.pbtech.co.nz/product/HOMMIX15918/Xiaomi-Mi-Home-…
https://www.pbtech.co.nz/product/HOMMIX24738/Xiaomi-Mi-Home-…

That's roughly $200 every 8–12 months for replacement filters. It's not terrible, but I was hoping to find a cheaper option in the $20–$30 range instead. The air purifiers themselves do a great job and I'm happy with their performance, but I was wondering if there are any more economical filter alternatives available.

I also tried extending the lifespan of the filters by using my WOLFBOX MF200 compressed air duster to blow out the accumulated dust, and I even tried washing them. Unfortunately, neither method worked for very long, and the filters still needed replacing fairly quickly.

What do you guys use and how much does it cost you to replace the filters and where do you get them from?

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  • dealhunter on 04/08/2026 - 22:47

    What are you really trying to filter

    • 0
    • NovaAlpha on 04/08/2026 - 23:07

      Dust, pollen, whatever is in the air.

      My partner is allergic to pollen and she sneezes a lot, but ever since we got these air purifiers, she hasn't sneezed as much. If she used to sneeze say 50 times a day, now it's down to maybe once a day or none at all.

      I can tell the air is definitely better around the house. It makes a difference.

      Unrelated, but I also have a PPM monitor and having really clean air and low PPM really helps me focus when WFH.

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