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Dyson air purifier outperformed by cheap DIY box fan filter in Marketplace test

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Re: Dyson air purifier outperformed by cheap DIY box fan filter in Marketplace test

#241
I guess I'll bring up the "let your kids play in dirt argument" and see if I get any comments. I've personally taken this path in life and I seem to have much fewer allergies and immune issues than lots of my friends who grew up with hospital-like childhood circumstances. It could just be observor bias but it seems like there is some underpinning to the theory of if you don't use it you lose it when it comes to immunity. I do wash my hands and keep my house tidy, but I don't dust every day or put in MERV32 level air filters. (just cheapest-that-i-can-find MERV 8 recommended by my HVAC manual)

Re: Dyson air purifier outperformed by cheap DIY box fan filter in Marketplace test

#242

Dyson : Air Products :: Beats : Audio Products Pretty much every Dyson product I've used, from the public bathroom air "blades" to the vacuums, seem like a gimmicky, inferior products with a premium price tag. None of them do their intended job better than older, cheaper products in their category. I know James Dyson is regarded as a genius engineer, but the consumer product company bearing his name seems to be 99% m…

He's an avid brexiteer as well, which is enough for me to never ever touch any of his products again and put maximum effort into discouraging people from buying anything from the company.

Re: Dyson air purifier outperformed by cheap DIY box fan filter in Marketplace test

#243
Is there any point to air purifiers at all? I remember researching them a while ago as a way to alleviate my allergy symptoms without medicine. But the overall scientific consensus seems very dubious. To be frank, it seems like yet another one of those very expensive placebo products that rich people like to buy because of media scare mongering.

I can see the obvious exception being a heavily polluted eastern city - but don't you need some heavy duty medical grade HEPA filters and fans to really make a large impact?

Re: Dyson air purifier outperformed by cheap DIY box fan filter in Marketplace test

#244
post #14

Earlier quoted context omitted.

I love the public bathroom Dyson thingies. They kinda became a standard for me now, love how quickly they dry hands. Way better than paper, towels or weak fans. But yeah, the other stuff is a bit gimmicky.

The best hand dryers I've user are the really powerful blowers that can peel paint if you need them to. They're extremely loud though.

I wondered how powerful an Xcelerator dryer is compared to an ion thruster a few years back. I'd looked at dryer specfications and realized they're in the same magnitude in terms of mN!

Re: Dyson air purifier outperformed by cheap DIY box fan filter in Marketplace test

#245
post #82

Earlier quoted context omitted.

Check out AvE’s tear down of a $500 Dyson hair dryer.[1] He was expecting to ridicule it but was instead blown away by the engineering - tiny high torque zinc cast brushless DC motor, CNC-milled impeller, etc. It’s a good watch, including FLIR performance analysis, Fourier analysis of bearing noise, and more. In summary it’s definitely more engineering porn / extreme overkill than marketing bs. [1] https://youtu.be/j…

It reminds me of a less-extreme version of Juicero. They made a $700 WiFi-connected "juicer" that squeezed bags of juice using QR codes to scan the bags and then a custom power supply, custom machined gears, and a custom 15A 330V DC motor to actuate a press to squeeze the bags between two metal plates. Of course, a roller could have done it for a fraction of the price, or you could have just let gravity pour the juic…

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Re: Dyson air purifier outperformed by cheap DIY box fan filter in Marketplace test

#246
post #243

Is there any point to air purifiers at all? I remember researching them a while ago as a way to alleviate my allergy symptoms without medicine. But the overall scientific consensus seems very dubious. To be frank, it seems like yet another one of those very expensive placebo products that rich people like to buy because of media scare mongering. I can see the obvious exception being a heavily polluted eastern city -…

If you're in the Western US/Canada, they're very helpful during the (more frequent and increasingly severe) fire and smoke seasons. See this pic of a filter after 6 days: https://www.reddit.com/r/pics/comments/9xroh4/air_filter_aft...

They're also good if you cook with oil indoors.

Re: Dyson air purifier outperformed by cheap DIY box fan filter in Marketplace test

#247
post #72

Box fan filters are great. The fans aren't really designed to operate with much load, so I had issues with the motors burning up eventually (3-12mo) when trying to force air through too fine of a filter (somewhere around merv 15 iirc, taped at the edges to prevent air from going around). In college I had a _really_ cheap flat, and all my neighbors were chain smokers. I didn't realize quite how bad it was in my apartm…

You can reduce load on the fan by increasing the number of filters. Arrange 2 into a wedge or 4 into a cube around the box fan and direct the airflow with cardboard and tape. Worked great at our drafty place during the forest fires last summer.

Re: Dyson air purifier outperformed by cheap DIY box fan filter in Marketplace test

#248
post #33

The recommended pick from the Wirecutter is the Coway AP-1512HH Mighty (as of this post, the recommendation was last updated January 15, 2021) [0]. The CADR is available on Coway's product page in what I assume to be imperial units given the units of the other specifications: "233 (Smoke), 246 (Dust), 240 (Pollen)" (under "Specification") [1]. This CADR score puts it just between the BlueAir Blue Pure 211 and GermGua…

Our Coway (bought from the Wirecutter recommendation) has been running for 2.5 years straight. The members of my household with asthma appreciate it year-round and especially during fire/smoke season.

Re: Dyson air purifier outperformed by cheap DIY box fan filter in Marketplace test

#249
I've got one of these Dyson purifiers + humidifiers, and it does seem to make the air noticeably nicer in the room we us it in.

But it's definitely NOT worth the price tag, as with all things Dyson lately. (Loved my vacuum 10 years ago, but the stick vacuums are kind of overpriced idiocy - get an Oreck)

Re: Dyson air purifier outperformed by cheap DIY box fan filter in Marketplace test

#250

Earlier quoted context omitted.

I prefer the Excel XLERATOR hand dryers, and usually spec them over most other models. Hands dry in ~10 seconds, not spashing onto a lower surface, etc.

I hate them because they are too loud. Sure they work fast, but I need to put air plugs in before using them, and those are never provided.

its 10 seconds, I prefer loud and fast to mediocre in both respects.
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