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Build a do-it-yourself home air purifier for about $25

uofmhealth.org

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Re: Build a do-it-yourself home air purifier for about $25

#111

Post by CompelTechnic »

apo wrote: post #90

Nifty idea, but I'm not sure I agree with the technique used to prove effectiveness: https://www.youtube.com/watch?v=kH5APw_SLUU The narrator puts a particle counter in front of the fan and notes the 90% reduction. So far so good. The problem is extrapolating this result to the entire room. Yes, maybe you'd get close to 90% if the device were allowed to run a few days. On the other hand, it could leave the situation…

If you check out Matthias wandel's YouTube channel, he does some experiments with hours-long recording of room particle counts. This is in a woodshop (sawdust) setting with a similar diy filter setup.

Re: Build a do-it-yourself home air purifier for about $25

#112

Post by reaperducer »

HillaryBriss wrote: post #109
csours wrote: post #84

Earlier quoted context omitted.

Does anyone know what the actual smell of "chinesium" comes from? The smell of artificial rubber products from china, like remelt and cancer.

I bought a mechanical product like that one time and had to leave it outside for about a month before it off gassed completely

Happened to me, too. Once with a dog house, and again with a set of car floor mats. The floor mats are still out there.

Re: Build a do-it-yourself home air purifier for about $25

#113

Post by gruez »

eli wrote: post #98
clairity wrote: post #62

Earlier quoted context omitted.

> “The general go-to clean room/industrial filter stack is Prefilter(F5 Bag)->HEPA->Activated Carbon.” yup, i bought a blueair 211+ ( https://www.blueair.com/us/blue/blue-pure-211/1695.html ), that has exactly those filter elements in a nice (if bigger than expected) package. this model was recommended by both consumer reports and the wirecutter (until recently, cynically thinking they didn’t pay wirecutter’s “endors…

Wirecutter doesn’t have endorsement fees

they don't, although if they recommend you, they'll ask you for a cut of sales (affiliate program). if you say no, they'll switch their recommendation to your competitor and never review your brand again.

https://news.ycombinator.com/item?id=16729408

Re: Build a do-it-yourself home air purifier for about $25

#114

Post by Scoundreller »

benbojangles wrote: post #85

I built my own air purifier in 2016, living in London, I was living in a basement and was having breathing problems due to mould. My landlady was gaslighting me at the time, so I built the air purifier. It worked for a while but mould spores cling to the paper filter and eventually grow into the filter material. I think Dyson uses glass fiber filter to stop this problem. My filter helped a lot, but eventually I had s…

> I was subletting so had no grounds for complaint

How does that work?

You may not be eligible for regular tenant protections, but you're still eligible for recourse through regular courts, no?

Re: Build a do-it-yourself home air purifier for about $25

#115

Post by wildfire_smoke »

peepopeep wrote: post #22

I was looking up air quality monitors but can't seem to find any on amazon with a calibration certificate that will accurately measure 0.3 micro particles. Am I the only one who thinks this is a great opportunity for a smart product with an app that has the features of a professional air quality monitor and simple UI / UX? If such product exists, does anyone know where I can find it?

Just got one of these - seems to correlate pretty well with the airnow.gov outdoor measurements https://shop.hellowynd.com/

Re: Build a do-it-yourself home air purifier for about $25

#116

Post by selimthegrim »

walrus01 wrote: post #23

Over the past two years as BC and WA have had terrible forest fires, this exact solution has become quite popular for people who are willing to DIY. the air quality in mid summer 2018 in Vancouver was really quite bad, exceeding Delhi or Beijing pm2.5 figures for weeks.

Was Seattle as bad PM2.5 wise?

Re: Build a do-it-yourself home air purifier for about $25

#117

Post by vt240 »

yonran wrote: post #44

Is there anywhere you can get a good blower fan for the purpose of filtering the air, instead of a box fan that has a lot of space around the blades?

Grainger [1] search for "industrial Blowers and Accessories" would probably be a good place to start looking. They tend to be expensive though. Take a look at McMaster-Carr [2] too.

[1]: https://www.grainger.com

[2]: https://www.mcmaster.com/

Re: Build a do-it-yourself home air purifier for about $25

#120

Post by Scoundreller »

LeoPanthera wrote: post #57

Huh! I independently "invented" this myself a couple of days ago when the Camp Fire blanketed the bay area in smoke. I got a 20x20 filter and some duct tape from Home Depot and a box fan from Target. (After discovering that Home Depot only sells fans in the summer.) I don't think I was the only one, though. HD was doing a brisk trade in 20x20 filters, and I think I bought the last box fan at any Target in the entire…

When you can't get house parts, try auto and computer parts.

Get some 120mm fans (or an array of 80mm, etc), and some engine air filters.

Don't change the filters too often:

"It is common, however, for servicing to occur when the filter appears dirty. Engine air filters are designed to actually increase their efficiency by using this initial layer of dust as an added filter layer. Initial filter efficiency is usually approximately 98% but increases to more than 99% by the end of the service life of the filter.

Therefore, changing an air filter before the useful service life is achieved can result in premature engine wear."

https://www.fueleconomy.gov/feg/pdfs/Air_Filter_Effects_02_2...

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