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Reverse engineering Xiaomi air purifier NFC stickers

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51–60 of 118 posts

Re: Reverse engineering Xiaomi air purifier NFC stickers

#52
post #43

Can someone explain what's the result of filter utilization / capacity. Is it efficiency? Does it start spilling out particles? I feel like a 100% used filter will still do a pretty good job, so unclear how much of the utilization % has commercial reasoning?

Efficiency in terms of airflow goes down, and static pressure difference goes up - but the filters trap more of the particles going through them. Changing filters on furnaces and AC units is really important, since lack of airflow hurts efficiency. Wirecutter (which is usually trash) confirmed this in testing; versions of units that had been running for months or longer (ie one they bought a year ago and used in some…

curious - why is Wirecutter trash? I’ve been sorta feeling iffy about them for no real reasons but they seem highly recommended

Re: Reverse engineering Xiaomi air purifier NFC stickers

#53
post #52

Earlier quoted context omitted.

Efficiency in terms of airflow goes down, and static pressure difference goes up - but the filters trap more of the particles going through them. Changing filters on furnaces and AC units is really important, since lack of airflow hurts efficiency. Wirecutter (which is usually trash) confirmed this in testing; versions of units that had been running for months or longer (ie one they bought a year ago and used in some…

curious - why is Wirecutter trash? I’ve been sorta feeling iffy about them for no real reasons but they seem highly recommended

They almost always conveniently only recommend products that allow for referral fees.

Re: Reverse engineering Xiaomi air purifier NFC stickers

#54
post #53
post #52

Earlier quoted context omitted.

curious - why is Wirecutter trash? I’ve been sorta feeling iffy about them for no real reasons but they seem highly recommended

They almost always conveniently only recommend products that allow for referral fees.

The product manufacturers don’t pay referral fees, it’s the retailer. So your entire argument against them is you’re mad they make money by linking to Amazon or target?

Re: Reverse engineering Xiaomi air purifier NFC stickers

#55
post #53
post #52

Earlier quoted context omitted.

curious - why is Wirecutter trash? I’ve been sorta feeling iffy about them for no real reasons but they seem highly recommended

They almost always conveniently only recommend products that allow for referral fees.

so pretty much anything sold by a major retailer?

Re: Reverse engineering Xiaomi air purifier NFC stickers

#56
post #11

I've never experienced an air purifier, what's the general consensus? Do they make a difference? Perhaps a placebo? A must have? Genuinely interested if I'm missing out - For what it's worth I do live right on a main road in the UK, so I expect there is some level of pollution in the air.

They also double as a mosquito trap. I used to suffer persistent mosquito annoyance at night, but, since I got an air filter, the problem is gone. I often clean out dead mosquitos from the air filter

Re: Reverse engineering Xiaomi air purifier NFC stickers

#57
post #43

Can someone explain what's the result of filter utilization / capacity. Is it efficiency? Does it start spilling out particles? I feel like a 100% used filter will still do a pretty good job, so unclear how much of the utilization % has commercial reasoning?

My intuition is that the more “full” it is, the less air will flow through it, meaning it just doesn’t do as much. Not to suggest that what the manufacture decides “100%” is is actually that.

That's exactly right for HEPA filters, not sure about other types of filters though.

Re: Reverse engineering Xiaomi air purifier NFC stickers

#58
post #53

Earlier quoted context omitted.

They almost always conveniently only recommend products that allow for referral fees.

The product manufacturers don’t pay referral fees, it’s the retailer. So your entire argument against them is you’re mad they make money by linking to Amazon or target?

I’d definitely prefer something like Consumer Reports who has the budget to expose scams like Molekule who claim to invent some magical new type of air purification.

Re: Reverse engineering Xiaomi air purifier NFC stickers

#59
post #53

Earlier quoted context omitted.

They almost always conveniently only recommend products that allow for referral fees.

The product manufacturers don’t pay referral fees, it’s the retailer. So your entire argument against them is you’re mad they make money by linking to Amazon or target?

[deleted]

Re: Reverse engineering Xiaomi air purifier NFC stickers

#60
post #18
post #11

I've never experienced an air purifier, what's the general consensus? Do they make a difference? Perhaps a placebo? A must have? Genuinely interested if I'm missing out - For what it's worth I do live right on a main road in the UK, so I expect there is some level of pollution in the air.

We live in the city and always are struggling with allergies. The whole family is always coughing or sneezing. We bought a xiaomi air purifier like in the article last week, started using it in the bedrooms for a few hours in the evening, and the allergies cleared up overnight. The particulate sensor is mostly useless, a known problem with the xiaomi models, but running it at a fixed setting seems to clean the air qu…

The particulate sensor on my Xiaomi air purifier correlates really well with the numbers from my city's air quality network.

What doesn't work well for me is the auto mode, it barely does anything at less than 50µg/m^3, way too high even for the mediocre air in my area. So instead I use automation in their app to let it run at full speed for 30 or 60 minutes.

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