Everybody knows about this one by now, but here are the specs anyway.
Features
Actually you can't, the authorities have been informed.
Yeah. Expect the authorities to break your door down and rappel and break your window. 🙃
Ladys and gentlemen, we gottem
hahaha
I kinda wanna just hose mine down like my vacuum filter, would anyone know if tyhis would work?
Try vacuuming your filter and reinstall filter. Reset air purifier and see how that goes.
That's a good call, thanks I will try this! Are those ebay xiaomi filters for half price much different results do we know?
@girafficlight: Def worth vacuuming the outside of the filter every couple of weeks, as it gets covered in hair/dust etc pretty quickly which will affect performance.
You can use them past their in-built expiry date - if the machine or the App gives you issues because it detects an expired filter you can just tape some aluminium foil over the RFID chip on the bottom of the filter and it should stop giving you issues.
But then you will need another vacuum so you can vacuum your vacuum filter now clogged up by the particulates from the air purifier filter
Leaf blower from the inside
Its a metal cheese grater-looking tube, I just run the vacuum over it every month.
the % of filter life remaining no longer is accurate but Ive covered the little screen up so it make no difference for me.
I've got 2 of these filters for years, I can answer.
It doesn't seem anywhere near as good. I was left with the feeling that I ruined an old filter by running it under a shower to clean it. Even after extensive drying it didn't seem right, and needed to be thrown out.
Replacement filter was of course miles better.
What is the rated voltage printed on the label at the base of your unit? I just got the unit delivered and the rated voltage is 120V~ instead of 100-240V~. But the unit seems to operate without issues. Don't know if this would be a fire harzard or the unit is actually rated 100-240V but just the label being printed like that for US market.
Why do you need it ? I have been breathing normal air for years ?
I have been breathing normal air for years ?
Shame it dont apply for everyone. If only. Specially those who have a dust and pollen allergy.
Got it. Mug of concrete for everyone.
Is this your learned medical opinion?
I take a little snort of asbestos each morning for just this reason. My doctor keeps saying “cancer” this and “your lungs are torn to shreds wtf are you doing” that but you’ve just got to train against it.
I didn't know I could breathe without a Xiaomi Mi Air Purifier Pro 3H thanks for letting me know.
Probably not a bad investment as bushfire season approaches.
Bushfire season has just passed
Sadly it will come again. Its a cycle.
Hold onto your butt. After consecutive La Niña there is so much built up fireload.
Bought it for hay fever, appeartly doesn’t work for me
@Allaboutdiscounts - Can you share where you get normal air from? Asking for a friend……
Even if you have good air quality around you, I have the 4Pro model and find it helps reduce dust build up in my apartment. It's also nice in summer when I crank the AC and this helps distribute some of the cold air.
Trees
I think it helped me, I have very bad hayfever and with this on in the morning I feel much better (physically or psychologically)
If your home is free from mold and has a good ventilation, I don't think it is very useful. It actually better to invest in a good vacuum to eliminate the source of dust.
On the other hand, if you have allergies and live in a bad place, this could be a necessary.
It actually better to invest in a good vacuum to eliminate the source of dust
Vacuum myself? Maybe i should live outside of the house then
Maybe for them peasants. I get jeeves to do my vacuuming.
or if u have a cat that shreds lots of hair
Not exactly true.
Dust mites are everywhere, look into them. Many people are sensitive or worse allergic to them and go about it their entire lives without knowing.
There’s lots of good reasons to get an air purifier, especially if you have pets, and especially if you ever have any semblance of any issues breathing through your nose.
I don’t think most people can easily fix ventilation and dust sources, an air purifier is ridiculously easy set and forget fix.
Seems like 4th gen already out
Me and 1 family member tried the 4th Gen pro and didnt find it as good as the 3H
The Xiaomi 3H was a great machine for many years (I own 2 of them), but at this point I'd advise caution since it is an older model and the genuine Xiaomi HEPA filter for this is quite expensive now — usually sells for $60-70 each (it used to go on sale for $30-35 each) and there hasn't been a filter sale for ages, probably close to 2 years now. And who knows, maybe the filters will suddenly no longer be sold. With that in mind, I'd hesitate to buy a 3H at this time.
Would probably be better to go for a newer model of air purifier at this point. What brand you choose doesn't really matter much, more important is the CADR (how powerful the machine is/how much air it can filter in a set amount of time) that suits your needs, and the continued availability and price of the filters.
And beware people constantly trash-talking certain air purifiers because of the CHOICE test results, those results don't mean a lot because it's always the biggest and most powerful (i.e. most expensive) models that score the highest. You definitely do NOT need to spend a tonne of money on air purifiers — even something cheap and cheerful like an IKEA is perfectly fine:
https://dynomight.net/ikea-purifier/
Just did a eBay search and found one that is $33.95
Not XiaoMi genuine but seems compatible
I'd advise people to steer well clear of generic/noname aftermarket HEPA filters, you can't trust them unless you get them tested by a lab to make sure they actually work properly.
probably depends on the use case of the air purifier
for dust and pollen probably wont really required a true HEPA filter
i have one of these and within a month smelt like a weird burning or i dont even know how to describe it smell.. switched to original and smell went away… went to another generic and smell was back within a month or 2.
You do realise that the genuine filters are RFID tagged?
Thanks thanks for the link, don't have bad allergies but thinking of getting air purifier for bedroom. Will consider ikea one now.
Really need a sale for the genuine filter :(
I have 2 cats and I vacuum twice daily but my partner has allery and sneeze a lot (maybe it's time to get rid of my partner? jk).
Used to have the 3H model but I gave it to my mum because just want to get rid of it and buy a new model lol
Now own a 4 pro model, costed me nearly $400. I looked up the specifications, it says it can produce more purified air per minute than a 3H and can cover more area but I don't find any big differences between these two models tbh. My partner does sneeze less though not sure if it's because of the purifier.
I reckon 3H should be sufficient enough for a room unless you have a super open floor plan.
you my friend need to xiaomi roomba! i have two cats myself and swea by the air purifier and roomba. I run the roomba 2-4 times a week and its incredible how much shit is collected (very rewarding)
u mind sharing which roomba and purifier u use? i'd like to check it out for my room that i share with my two cat overlords
edit: just mainly wana use it for a room that is approx 3.6m x 3.6 ( is that ~13m²?) as that is where they mainly hang out (my bedroom)
https://www.catch.com.au/product/xiaomi-viomi-v2-pro-robot-v…
This is the one I got at around 250 3 years ago (off of ozbargain obviously) I use it for my whole house, and set it off while im at work. if it is only for one room maybe you don't need it though.
as for purifier i also have the 3h and swear by it, for hair dust, and fur. I move it around the house and smash it on max sometimes. Also good for bad kitchen cook smells
"JuST bUilD YoUr OwN FoR $20 BuCks, EaSy"
Got a couple of paperclips. Gonna MacGyver one.
We are struggling to keep the dust away at home. Do you think this will help?
Some people claim that air purifiers help with reducing the amount of dust in the home, but I'm skeptical of that, I haven't noticed any real difference in my experience. Most dust settles on surfaces or the floor, and an air purifier doesn't do anything in that situation.
Some people claim that air purifiers help with reducing the amount of dust in the home, I'm not really skeptical of that, I have noticed real differences in my experience. Most dust settles on surfaces or the floor from the air, and an air purifier does do something in that situation.
We are struggling to keep the dust away at home. Do you think this will help?
Not in the slightest. I say this as someone who has owned 5 of them at the same time.
If you want air purifiers to stop dust, then you either need so much airflow that they will totally disrupt normal airflow in the room and sound like jet engines, or you need to set up some kind of positive pressure system that ducts air from the outside through a filter and then into your house.
but where does all the dust on my filter come from then?
Dead skin cells
It will do a tiny bit.
But if you want to reduce dust the best thing I have found is a robot vacuum. Set it to vacuum everyday which is way more than most people will do and it keeps a lot of dust out.
That and sealing gaps with weather strips etc.
just good luck getting an original filter for under $80 and in stock… I have used 2 generic filters bought from 2 different sellers and both ended up with funky smells after being used for like a month. Popped an original one in and no issues….
Just replaced the filter in mine with a generic one, and after a couple of weeks the purifier started making an annoying buzzing noise.
Does this, or any other air purifiers show you graphs of air quality over time? From my research, it looks like most just tell you what it is live, but doesn't track it?
Might be worth checking the details of the companion app, Google Assistant and Amazon Alexa.
I agree with you, it would be a great data to be able to see over time :)
Not by default, no. The Xiaomi Mi Home app only shows you the instantaneous (current) air quality reading ("Air Quality Index"). If you are technically savvy you can setup Home Assistant and connect your Xiaomi air purifier that way, and it will log the sensor data including air quality, temperature and humidity. This is what I do, and it works well.
However, note that most cheap consumer machines like the Xiaomi 3H don't have very sensitive air quality sensors, so they don't tend to pick up anything unless it is really noxious/obvious.
Good air quality sensors cost a fair bit of money so you tend to only find them in the more expensive air purifiers.
If you are serious about monitoring air quality, I'd recommend getting a dedicated, proven air quality sensor rather than relying on the one in your air purifier. Expect to pay around $60-200 for a decent one, depending on whether you build it yourself from known good parts or buy something off the shelf.
Many thanks for taking the time to write this :)
Hey, thanks for this write up. It's really useful. It also puts some information together really succinctly I've been struggling to find.
Can you recommend some good air quality monitors? The cheaper the better, but I understand you get what you pay for.
You're welcome — check out my old comment in this post for more details on air quality sensors; Netatmo is one I've seen recommended, though I don't have any experience with it myself:
https://www.ozbargain.com.au/comment/13285928/redir
No purifier that I have ever come across shows air quality over time. Some third party monitors do so… I believe that the fancier version of this does a graph by time: https://smartairfilters.com/en/product/laser-egg-particle-co…
Something like this can generate a .csv file over whatever time period you want to run it for (I've done this). http://dylosproducts.com/
You can use it with home assistant (which can track and graph over time) but as the other user noted, the sensors aren't sensitive enough and will only really tell you when quality gets particularly bad.
Dyson does.
I've not seen tests, but the way that Dyson fans work is that a tiny bit of air goes through the fan 'machinery, and a much larger amount gets sucked through the big loop at the top without any treatment to it. This isn't what you want from a purifier, you want all of the air going through the fan blades and then a physical filter.
I've always looked at the Dyson 'purification' claim as a marketing tickbox. Could be wrong, but it seems sufficiently obvious to me that I've not looked for independent testing and comparisons.
In fact, I have a couple of fans that follow the Dyson design and have filtration units in the base. I didn't even bother to install the filters as I don't expect them to do anything except for slowly clog up over time with coarse dust.
Edit: Just looked up Dyson. They claim that 15x air goes through the big loop up top compared to the fan blades in the base. That means only 6% of the air moving through the fan is going through the filter, the rest is unfiltered. You would need crazy high airflow from that fan for it to be of much use cleaning a room. If it was effective, it would not last long either- those filters are very small compared to even an Xiaomi filter (which is already on the small side.) Dyson fans I think are pretty good, but the idea of them as 'purifiers' is just a marketing scam.
https://www.jameco.com/Jameco/workshop/howitworks/dysonairmu…
I have heard people say the Dyson design isn't the best.
I have a Dyson purifier, which was the only one I could get at the time. I got it for the bushfires and it did a great job of dealing with the smoke. It definitely does something, but not the best choice with all the options available.
@Aureus: TBH I'm so unimpressed with the Dyson purifier idea that I'm happy to hear that it works with cleaning out smoke!
I can't test my Dyson clone, unfortunately. I've tossed the filters and frankly Oz air is so good compared to what I'm used to that I've packed my particle counters away.
Was thinking to get this or the 4 lite but ended up buying the 4 lite for $174. They increased the price now to $184.
I've been following this specific air purifier for a while, which is why I finally pulled the trigger today when I found this price - point is, a lot of contributors to the forum have emphasised the HEPA filter and to the best of my knowledge the Xiaomi Air Purifier 4 range do not have this.
Actually, I'm pretty sure the Xiaomi 4 does use a HEPA filter, it's just their marketing likes to claim it as better than a normal HEPA filter, that's all:
https://www.pcbyte.com.au/p/xiaomi-mi-air-purifier-4-filter-…
Either way, it should do everything that a normal HEPA filter does.
I meant to say 'True HEPA Filter'.
@Barry frm EastEnders: Not sure what you mean by "True HEPA filter", it either meets the HEPA standard or it doesn't.
According to Xiaomi's brochure in the link above, it provides "99.97% filtration of 0.3 μm particles" so it meets the H13 standard:
https://en.wikipedia.org/wiki/HEPA
Check out this piece on the IKEA air purifier, it explains the HEPA standards much better than I can, and why "true HEPA filter" is a meaningless term:
https://dynomight.net/ikea-purifier/
I thought it was a 2009 Mac Pro desktop
For $190.07 each. I will buy their entire stock.
Any deals on filters at the moment? Genuine stock seems to have been out for a while now.
has anyone used this https://www.kogan.com/au/buy/kogan-smarterhometm-air-purifie…? wondering if its a better buy than he xiaomi air purifier.
It looks perfectly fine to me — remember, air purifiers are mechanically extremely simple machines, so it's hard to really go wrong — see my comment above for details on what to look for.
The Kogan HEPA filters are a bit cheaper than the Xiaomi ones, so that's nice. If you think that Kogan will continue to sell these filters at a similar price for a few more years, then it's probably worthwhile. If they stop selling the filters, then you're screwed — that goes for any manufacturer, not just Kogan of course.
I can’t seem to find any replacement filter around. They’re either super expensive like $100… where did everyone get theirs from?
I bought mine from kogan but that was ages ago though so not sure where to get them anymore.
It looks like Kogan is still selling filters for a reasonable price — but I'm not sure if it's the genuine brand instead of a generic no-name model, hard to tell since they don't list the specific filter model name:
https://www.kogan.com/au/buy/xiaomi-mi-hepa-filter-air-purif…
Based on the price I'm inclined to think this is a genuine Xiaomi-made filter, the no-name ones usually sell for $30-35 though I have seen ridiculous prices on eBay for knock-offs as well.
BTW I just did a check on eBay and the supply situation for genuine Xiaomi HEPA replacement filters for the 3H is more dire than ever, everywhere is sold out. Kogan seems to be one of the few remaining places to source one. My suspicion is that Xiaomi is no longer manufacturing these, so it's a concerted push to get people to upgrade to the latest air purifier models which use a different form factor for the filter.
@deadpoet @jdreamer I just got the one in Kogan delivered, can confirm it is the real deal.
Thank you guys!
Thank you for sharing that, good to know!
I have serious allergies. Been using this filter and a pro version for years, they are fantastic.
Replacement filters have gotten harder to source (genuine items), due to covid kicking off a few years ago all the usual stock dried up as I assume the Chinese market absorbed it all. Certainly the Australian Mi store hasn't had a genuine filter in stock for version 3H for a few years. Kogan used to be the best place to buy replacements, unsure if they're still stocking genuines.
By the way you'll get about a whole 12 months of continuous use out of a filter, maybe a bit more they're really good.
I just purchased the 4 lite model for the same price ($190). I think it looks much nicer and has better specs, quieter, more efficient, etc.
![[eBay Plus] Xiaomi Mi Air Purifier 3H $190.07 Delivered @ Briseekit eBay](https://files.ozbargain.com.au/n/43/761243.jpg?h=3d4a14f5)
Using mine for over 1 year now. You can keep using it even the filter has run out.