Air purifier? - Part 2
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WussRedXLi
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The filter is big.
Originally i thought i made a mistake, coz i thought the filter would smell some 6 months later and i'd have to throw it away liao.
But apparently even close to 2 years, there is a very very mild smell only, even upon the initial power up phase during first 30 seconds in which the smell would be strongest. But even directly 30cm from the vent, not much smell. And i am quite sensitive to smells type.
Weird....
The filter is equivalent to an approx 70cm x 41cm x 4cm thick. 202 pleats.
By comparison, a Sharp A40, 840 based filter is around 100 pleats. IIRC 37cm x 24cm x 3.2cm thick.
Basically about 4 times.
ZeusTheMighty
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hi guys i'm reading this thread from the last page and the last few pages all talking about xiaomi purifiers? No other brand mentioned?
ZeusTheMighty
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Is gen 1 or gen 2 better? gen 2 filters more ex?
ZeusTheMighty
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huh now have gen 3? i just ordered a gen 2
Lucky177
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Is called 米家空气净化器 Pro (use this naming and Google to find out more if interested)
For simplicity, some referred it as XiaoMi Air Purifier Pro.
https://xiaomi-mi.com/air-and-water-purifiers/xiaomi-mijia-air-purifier-pro/
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Lucky177
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There are 3 types of XiaoMi Air Purifier filters.
1. Blue normal type
2. Green enhanced type
3. Purple antibacterial type
All can be used in Gen1/Gen2/Pro.
A brief description of all the 3 types could be found in this listing.
http://list.qoo10.sg/item/XIAOMI-RE...ER-FILTER-USE-APP-CHECK-AIR-QUALITY/437413356
Disclaimer: Not asking to buy from this one cos' may not the cheapest u could find and currently they only have stock for the blue original filter in their listing.
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wizardundo
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Mi purifier Gen 1 $59/-
Xiaomi PC show @ MBS hourly special.
Too bad it's gen 1.
Xiaomi PC show @ MBS hourly special.
Too bad it's gen 1.
Lucky177
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At such pricing is a steal! If want better coverage, doesn't mind slightly "louder" (relatively), Gen1 is still a preferred choice over Gen2.
Of course if wants the best of the both, then is the Pro. But one need to pay much more as compared to only $59.
Of course if wants the best of the both, then is the Pro. But one need to pay much more as compared to only $59.
NWT1978
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Mi purifier Gen 1 $59/-
Xiaomi PC show @ MBS hourly special.
Too bad it's gen 1.
such nice price
Lucky177
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Saw this.
For bundled offer, no need go down and squeeze with the crowd.
http://www.lazada.sg/xiaomi-note-2-...urifier-1worth-299-20499200.html?ff=1&sc=IQsB
For bundled offer, no need go down and squeeze with the crowd.
http://www.lazada.sg/xiaomi-note-2-...urifier-1worth-299-20499200.html?ff=1&sc=IQsB
WussRedXLi
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There's no real dedicated water filter thread here in HWZ, so if you guys don't mind i think this is a decent thread to post in and spread this interesting article.
It's a pretty similar to haze that's often debated. Do we have to filter our pristine PUB water? Esp we are already using copper pipes and lead free joints, and PUB are test sampling at our consumer water tanks end as well?
This is a very interesting read. It's not meant to fear-monger, but to provide more knowledge. For adults, maybe it's not that big a deal, but for infants all the way to young teenagers, it might affect them to a much bigger extent.
https://www.sciencenews.org/blog/science-public/lead-free-faucets-are-anything
Lead-free? Faucets are anything but
BY JANET RALOFF 3:48PM, OCTOBER 30, 2008
Caroline Elfland began receiving complaints soon after researchers started occupying one of a pair of brand new buildings on the University of North Carolina campus, almost two years ago. People said the water tasted funny — as in bad. To ferret out the source of the noxious taste, this associate vice chancellor directed all sorts of probes into the new facilities’ construction, into water entering the buildings from mains in the street, and of course into plumbing materials.
Within several months, these investigations uncovered a nasty surprise — one that would ultimately prove unrelated to the taste problem. Faucets throughout both buildings in the $100 million science complex — along with those in an equally new building elsewhere on campus — were dispensing water heavily contaminated with lead, a toxic heavy metal.
“These were brand new buildings,” Elfland emphasizes. “They had no lead solder. No lead pipes. How could this be?” The water utility couldn’t be blamed; its supplies were lead-free.
The investigations Elfland triggered would ultimately indict new “lead-free” faucets. These weren’t weird faucets. Or foreign counterfeit fixtures. Or in any way unusual. They’re the same types and brands of faucets used throughout American homes, businesses and schools.
Elfland is coauthoring a paper describing this nightmarish case study for an American Water Works Association specialty conference in about two weeks.
The Environmental Protection Agency requires that action be taken to reduce lead in drinking water when concentrations reach 15 parts per billion. Values associated with every tap in the new UNC buildings exceeded that. Sometimes by a factor of 10. In the worst case: Drinking water carried 1,200 ppb lead.
As word got out, Elfland recalls people were starting to panic. “I had pregnant post-doctoral fellows asking me: ‘Have I been drinking lead in water?’”
Eager to get to the heart of the problem, Elfland asked her school’s engineering faculty for guidance. And they said: “We have two words for you — Marc Edwards.” The Virginia Tech engineering professor has a reputation for solving challenging water-quality puzzles.
That was 18 months ago.
Edwards quickly traced the problem to the buildings’ faucets and water fountains. Or, more precisely, to the fixtures’ brass.
Commercial and almost all home drinking-water fixtures are made from brass, even if they carry a plated veneer of chrome, nickel or brushed aluminum. In the United States, that brass can contain up to 8 percent lead — as long as it doesn’t leach more than 11 ppb of the metal into drinking water.
The problem, Edwards — and now UNC — has found: The standard recipe for the water used to evaluate how much lead will leach from a brass fixture is remarkably tame. Think of it as crash testing a car by running it into a pile of pillows. Of course it won’t sustain damage. Contends Edwards, the water that the plumbing industry uses to evaluate lead leaching similarly offers an easy test for most brass fixtures to pass.
In the real world, however, as in UNC’s new research buildings, these fixtures can fail the lead-leaching test. Big time.
The good news: Serious lead leaching doesn’t tend to continue forever. Over time, the brass tends to develop a sheath of rust and chemicals that will retard the toxic metal’s escape. How long it takes for the leach-inhibiting coating to develop depends on the recipe of the local water and the lead content of the fixtures.
In UNC’s case, the water had a low concentration of sodium-bicarbonate (what we know of as baking soda). And that’s too bad, since that bicarbonate would have helped to quickly coat the brass surface. The local water was also disinfected with chloramine, not chlorine. Another problem since chlorine tends to retard lead leaching, Edwards says. For reasons that have yet to emerge, he notes, chloramine-treated water doesn’t.
So is there something anomalous about water serving the Chapel Hill, N.C., campus? Not really, Edwards says. “We’re not seeing this more because we haven’t been looking.” People seldom test for lead in new buildings. “If they did,” he told me, “I think they’d find it in a surprising number of locations.”
Based on the specific chemical makeup of UNC’s water, lead-leaching from new faucets normally takes about six months to naturally abate, Elfland found.
Edwards designed a simple means to accelerate the process. Run every faucet in a new building at full throttle for 10 minutes, then crank the flow rate down to a trickle and let the water continue running from every faucet for the next three days. Following this conditioning protocol, 99 percent of UNC’s new faucets met the EPA lead standard.
While effective, this procedure proved time consuming and costly. Water had to be sampled from every fixture, and then sent to an EPA-certified lab for testing. “In round numbers,” Elfland has calculated, “this comes to about $100 a tap.”
And that’s not the end of it. Aerators and sieves collect debris at the end of a faucet or right inside the top of the fountains. And surprisingly, Edwards found at UNC, much of that debris consists of lead. Indeed, some collectors accumulated astounding amounts of corrosion debris and lead after just the conditioning treatments.
So each treated fixture must to be opened and cleaned out. If you don’t do that, Elfland warns, the exiting water will just wash over those particles — grinding them down (and into your water glass) or just leaching out much of their lead. This could cause the lead-poisoning risk to persist months or more after the fixtures’ brass has all but shut down its leaching.
“If I could find a faucet or water fountain made with no lead, even if it cost $50 more per faucet, I’d buy them,” Elfland says. In the end, they’d cost her less.
So, I asked her, have you identified such faucets? “Uh, no,” she says. And she’s looked — high and low. For more on the depressing information she and Edwards turned up during that search, check back for tomorrow’s blog.
It's a pretty similar to haze that's often debated. Do we have to filter our pristine PUB water? Esp we are already using copper pipes and lead free joints, and PUB are test sampling at our consumer water tanks end as well?
This is a very interesting read. It's not meant to fear-monger, but to provide more knowledge. For adults, maybe it's not that big a deal, but for infants all the way to young teenagers, it might affect them to a much bigger extent.
https://www.sciencenews.org/blog/science-public/lead-free-faucets-are-anything
Lead-free? Faucets are anything but
BY JANET RALOFF 3:48PM, OCTOBER 30, 2008
Caroline Elfland began receiving complaints soon after researchers started occupying one of a pair of brand new buildings on the University of North Carolina campus, almost two years ago. People said the water tasted funny — as in bad. To ferret out the source of the noxious taste, this associate vice chancellor directed all sorts of probes into the new facilities’ construction, into water entering the buildings from mains in the street, and of course into plumbing materials.
Within several months, these investigations uncovered a nasty surprise — one that would ultimately prove unrelated to the taste problem. Faucets throughout both buildings in the $100 million science complex — along with those in an equally new building elsewhere on campus — were dispensing water heavily contaminated with lead, a toxic heavy metal.
“These were brand new buildings,” Elfland emphasizes. “They had no lead solder. No lead pipes. How could this be?” The water utility couldn’t be blamed; its supplies were lead-free.
The investigations Elfland triggered would ultimately indict new “lead-free” faucets. These weren’t weird faucets. Or foreign counterfeit fixtures. Or in any way unusual. They’re the same types and brands of faucets used throughout American homes, businesses and schools.
Elfland is coauthoring a paper describing this nightmarish case study for an American Water Works Association specialty conference in about two weeks.
The Environmental Protection Agency requires that action be taken to reduce lead in drinking water when concentrations reach 15 parts per billion. Values associated with every tap in the new UNC buildings exceeded that. Sometimes by a factor of 10. In the worst case: Drinking water carried 1,200 ppb lead.
As word got out, Elfland recalls people were starting to panic. “I had pregnant post-doctoral fellows asking me: ‘Have I been drinking lead in water?’”
Eager to get to the heart of the problem, Elfland asked her school’s engineering faculty for guidance. And they said: “We have two words for you — Marc Edwards.” The Virginia Tech engineering professor has a reputation for solving challenging water-quality puzzles.
That was 18 months ago.
Edwards quickly traced the problem to the buildings’ faucets and water fountains. Or, more precisely, to the fixtures’ brass.
Commercial and almost all home drinking-water fixtures are made from brass, even if they carry a plated veneer of chrome, nickel or brushed aluminum. In the United States, that brass can contain up to 8 percent lead — as long as it doesn’t leach more than 11 ppb of the metal into drinking water.
The problem, Edwards — and now UNC — has found: The standard recipe for the water used to evaluate how much lead will leach from a brass fixture is remarkably tame. Think of it as crash testing a car by running it into a pile of pillows. Of course it won’t sustain damage. Contends Edwards, the water that the plumbing industry uses to evaluate lead leaching similarly offers an easy test for most brass fixtures to pass.
In the real world, however, as in UNC’s new research buildings, these fixtures can fail the lead-leaching test. Big time.
The good news: Serious lead leaching doesn’t tend to continue forever. Over time, the brass tends to develop a sheath of rust and chemicals that will retard the toxic metal’s escape. How long it takes for the leach-inhibiting coating to develop depends on the recipe of the local water and the lead content of the fixtures.
In UNC’s case, the water had a low concentration of sodium-bicarbonate (what we know of as baking soda). And that’s too bad, since that bicarbonate would have helped to quickly coat the brass surface. The local water was also disinfected with chloramine, not chlorine. Another problem since chlorine tends to retard lead leaching, Edwards says. For reasons that have yet to emerge, he notes, chloramine-treated water doesn’t.
So is there something anomalous about water serving the Chapel Hill, N.C., campus? Not really, Edwards says. “We’re not seeing this more because we haven’t been looking.” People seldom test for lead in new buildings. “If they did,” he told me, “I think they’d find it in a surprising number of locations.”
Based on the specific chemical makeup of UNC’s water, lead-leaching from new faucets normally takes about six months to naturally abate, Elfland found.
Edwards designed a simple means to accelerate the process. Run every faucet in a new building at full throttle for 10 minutes, then crank the flow rate down to a trickle and let the water continue running from every faucet for the next three days. Following this conditioning protocol, 99 percent of UNC’s new faucets met the EPA lead standard.
While effective, this procedure proved time consuming and costly. Water had to be sampled from every fixture, and then sent to an EPA-certified lab for testing. “In round numbers,” Elfland has calculated, “this comes to about $100 a tap.”
And that’s not the end of it. Aerators and sieves collect debris at the end of a faucet or right inside the top of the fountains. And surprisingly, Edwards found at UNC, much of that debris consists of lead. Indeed, some collectors accumulated astounding amounts of corrosion debris and lead after just the conditioning treatments.
So each treated fixture must to be opened and cleaned out. If you don’t do that, Elfland warns, the exiting water will just wash over those particles — grinding them down (and into your water glass) or just leaching out much of their lead. This could cause the lead-poisoning risk to persist months or more after the fixtures’ brass has all but shut down its leaching.
“If I could find a faucet or water fountain made with no lead, even if it cost $50 more per faucet, I’d buy them,” Elfland says. In the end, they’d cost her less.
So, I asked her, have you identified such faucets? “Uh, no,” she says. And she’s looked — high and low. For more on the depressing information she and Edwards turned up during that search, check back for tomorrow’s blog.
WussRedXLi
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Just thinking aloud.....
PUB can go sample the rooftop tank discharge point, they can even go sample at the carpark tap washing point or something like that. They really do this from time to time for monitoring purposes, you can google it up.
But unfortunately this still might not report anything amiss the vast majority of the time. Just a simple change of the faucet tap at home (taobao or not from taobao...doesn't matter, the above happened in USA), and wala.
The above lead leaching was from a brass fitting. Absolutely nothing "lead" about it.......
PUB can go sample the rooftop tank discharge point, they can even go sample at the carpark tap washing point or something like that. They really do this from time to time for monitoring purposes, you can google it up.
But unfortunately this still might not report anything amiss the vast majority of the time. Just a simple change of the faucet tap at home (taobao or not from taobao...doesn't matter, the above happened in USA), and wala.
The above lead leaching was from a brass fitting. Absolutely nothing "lead" about it.......
Last edited:
WussRedXLi
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