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The Weight of Numbers: Air Pollution and PM2.5

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Re: The Weight of Numbers: Air Pollution and PM2.5

#11
Its probably worse that it looks

"Researchers from Queen Mary University of London have found that people exposed to air pollution levels well within UK guidelines have changes in the structure of the heart, similar to those seen in the early stages of heart failure."

https://www.sciencedaily.com/releases/2018/08/180803103315.h...

Re: The Weight of Numbers: Air Pollution and PM2.5

#12
post #7
post #4

Earlier quoted context omitted.

I have a sensor built into an air purifier and have observed the same. Anything textile-related is bad like shaking out your blanket, which makes carpets seem horrible to me. But frying stuff really is the worst. You can go in the hundreds of micrograms, even with induction. A positive thing I have also learned is that opening the windows works best to get PM levels to a background level. Luckily it is only in the ar…

Do you recommend the air purifier that you have? And would you mind sharing which one has a built-in sensor? I'd like to try measuring my laundry room.

They are expensive, and it doesn't have a built in sensor, but I have an IQAir healthpro compact and have confirmed with my own particle detector that it filters out > 99% of PM0.1 particles, and 100% of PM2.5 particles.

If you don't care what it looks like, you can easily build your own air purifier for much cheaper. All it is is a blower fan which forces air through 2 or 3 filters, with the last being a HEPA filter. You can get all the requisite pieces for about $100.

Re: The Weight of Numbers: Air Pollution and PM2.5

#13
post #3

I recently built a sensor for particulate matter (using the Plantower PMS7003, a laser-based sensor) and it's interesting to look at the effects of every day tasks. Cooking for instance causes a huge spike in PM1.0/2.5/10.0 levels, but so do more mundane tasks like vacuuming or spraying aerosols. I'd like to add a sensor for CO2, but it's a bit more complicated. A lot of the easy to use sensors marketed for the purpo…

Are there any schematics / plans for your project? I honestly don't trust Phoenix's sensor data (many times it says things are OK - AQI is green - but just looking around you can tell its not).

Re: The Weight of Numbers: Air Pollution and PM2.5

#14
post #5

Does anyone have experience with buying an air quality sensor for personal use? I know of Plume and AirBeam but have not seen them in use.

I have this one and it works quite well: https://www.amazon.com/gp/product/B071RF6B2Y

I compared it with a friends much more expensive device, and the results were within 5% of each other.

Re: The Weight of Numbers: Air Pollution and PM2.5

#15
Does anyone have a sense of where the damage is done regarding PM? I live in SF and our apartment is a block away from a busy road and a gas station, both of which concern me. Not to mention the wild fires of late depositing ash all over our yard.. Also, being a SF apartment, there isn't A/C so we leave the windows open on hot days.

Is there data around whether an active air filter running in a closed room before we go to sleep will help? Should it just run constantly? Is there any good method to actually lower the amount of PM I'm inhaling?

Re: The Weight of Numbers: Air Pollution and PM2.5

#16

Does anyone have a sense of where the damage is done regarding PM? I live in SF and our apartment is a block away from a busy road and a gas station, both of which concern me. Not to mention the wild fires of late depositing ash all over our yard.. Also, being a SF apartment, there isn't A/C so we leave the windows open on hot days. Is there data around whether an active air filter running in a closed room before we…

I bought a AirMega last year. It always runs on "quiet mode" and the PM2.5 is below 5 all the time in my 900sqf apartment. http://airmega.com

Re: The Weight of Numbers: Air Pollution and PM2.5

#17
post #14
post #5

Does anyone have experience with buying an air quality sensor for personal use? I know of Plume and AirBeam but have not seen them in use.

I have this one and it works quite well: https://www.amazon.com/gp/product/B071RF6B2Y I compared it with a friends much more expensive device, and the results were within 5% of each other.

None on Amazon appear to have overall high ratings.

There's probably opportunity in the space for someone who can create an effective, reasonably-priced model.

Re: The Weight of Numbers: Air Pollution and PM2.5

#18

Does anyone have a sense of where the damage is done regarding PM? I live in SF and our apartment is a block away from a busy road and a gas station, both of which concern me. Not to mention the wild fires of late depositing ash all over our yard.. Also, being a SF apartment, there isn't A/C so we leave the windows open on hot days. Is there data around whether an active air filter running in a closed room before we…

You can use www.breezometer.com to check real time PM2.5 readings in your location. Based on that you can figure out whether you need an air filter or not.

Re: The Weight of Numbers: Air Pollution and PM2.5

#19

Does anyone have a sense of where the damage is done regarding PM? I live in SF and our apartment is a block away from a busy road and a gas station, both of which concern me. Not to mention the wild fires of late depositing ash all over our yard.. Also, being a SF apartment, there isn't A/C so we leave the windows open on hot days. Is there data around whether an active air filter running in a closed room before we…

Purpleair.com has a map of of sensors that update in near real time you can look at.

Re: The Weight of Numbers: Air Pollution and PM2.5

#20
post #12
post #7

Earlier quoted context omitted.

Do you recommend the air purifier that you have? And would you mind sharing which one has a built-in sensor? I'd like to try measuring my laundry room.

They are expensive, and it doesn't have a built in sensor, but I have an IQAir healthpro compact and have confirmed with my own particle detector that it filters out > 99% of PM0.1 particles, and 100% of PM2.5 particles. If you don't care what it looks like, you can easily build your own air purifier for much cheaper. All it is is a blower fan which forces air through 2 or 3 filters, with the last being a HEPA filter…

We use IQAir machines, too, but buy third party filters from HEPAAirDirect.com as they're cheaper than the originals, and seem very well made. And their pre-filter comes with a removable coarse dust filter.

For the DIY route, these guys in Beijing sell a kit: https://smartairfilters.com/cn/en/

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