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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

#371

Post by SeanLuke »

BHSPitMonkey wrote: post #158
kevstev wrote: post #129

Earlier quoted context omitted.

Do you have any more info to back this? I am honestly curious- I bought a Dyson Animal about 12 years ago now, and its still going strong, and is the best vacuum I have ever used. Not having to keep bags around is nice too. Our usecase is relatively light- we have area rugs mostly, but its still head and shoulders above the previous vacuum we had, and any of the ones my parents had growing up.

The common reason I see for vacuum enthusiasts bashing on bagless units is air hygiene; as soon as you take out the canister, you're releasing a bunch of the vacuumed matter back into the air and breathing it into your lungs. This can probably be mitigated by carefully emptying the contents outdoors, but a lot of apartment-dwellers can't really do that.

Bagless is also an excellent way to shorten the life of the motor and fan subsystem.

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

#372

Post by pmontra »

ortusdux wrote: post #89
Karawebnetwork wrote: post #61

Earlier quoted context omitted.

I live in a large loft-style apartment on two floors which is actually a large room. There are only a few windows and they are placed in a way that no air draft gets created. When I bought a purifier, one of the things I was looking for was air movement. I position my Dyson so that there's a draft throughout the apartment. I thought this would improve the air filtration because the air would move through my home and…

My issue is the cost. My local costco has these units in store for $800 USD. Further down the isle they have oscillating tower fans for $30, and smart air filters for $100. I bought two pairs of each before winter. The fans are quiet, have plenty of control options, and non-volatle memory so you can use them with smart plugs. The air purifiers are 4 stage, with active charcoal and a long life (6 mo, 20$) hepa filter.…

Serendipity happens: I was looking at a number of videos about DIY Dyson fans after I learned that bladeless fans exist. Then this post on HN.

Examples

https://youtu.be/vyJ4wA-3dnY

https://youtu.be/sFRXkH2XjsU

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

#373

Post by hedora »

victor106 wrote: post #224
gonehome wrote: post #206

Earlier quoted context omitted.

The fan also sucks compared to something like a Vornado. "Buffeting" of air is not a practical issue when using a fan - you want a fan that can create a lot of air flow. The Dyson fan comes across form first then making up reasons to explain the form retroactively. It feels like an interesting look is the goal rather than something that's actually better. Am I wrong about this? Do people that have the fan like it? Is…

Why is the medifyair your favorite? I wasn’t able to find any reviews I could trust on it.

Wirecutter has a review of one of the Medifyair models. They don't recommend it because it's too big, and overkill for their test apartment in New York City. It had the highest CADR in their testing.

For a modest house in the Bay Area during fire season, we needed a high MERV furnace filter and also two filters similar to their recommended models, so I moved up to the Medifyair. It arrived after the last fires, but it seems to work extremely well.

Hopefully, we won't need it this year...

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

#374

Post by ogre_codes »

If I was running a business and wanted maximum filtration for cheap, the box fan is rad. I want something which sits in my office and quietly sucks little bits of crud from the air. The Dyson absolutely does that job. Probably not as much as a loud ass box fan, but that’s not the point.

There are other solutions which might do what the Dyson does in terms of noise/ air circulation, but the box fan rig isn’t it.

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

#375

Post by Judgmentality »

catmanjan wrote: post #366
Judgmentality wrote: post #344

Earlier quoted context omitted.

Would you rather take a chance at greatness, or a certainty at mediocrity? No guts no glory.

Surely laughing when your child falls over leads to them enjoying others misfortunes

I think you're assuming the laughter is at the child, not with the child. It's laughing about a mistake because that's what makes us human.

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

#376

Post by cortesoft »

mminer237 wrote: post #120
crmd wrote: 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…

Sure, but a fan is going to be visible in the room that it is in... caring about the aesthetics of it doesn’t seem necessarily foolish.

People spend way more money for decorative things that have no functional purpose at all.

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

#377

Post by the-pigeon »

This headline is intentionally misleading.

They put a Merc 11 filter on a box fan. The Merc 11 filter outperformed Dyson. Not some homemade filter.

And duh? Any air purifier where the air actually goes through a filter is going to perform better. Worth testing but not interesting.

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

#378

Post by catmanjan »

Judgmentality wrote: post #375
catmanjan wrote: post #366

Earlier quoted context omitted.

Surely laughing when your child falls over leads to them enjoying others misfortunes

I think you're assuming the laughter is at the child, not with the child. It's laughing about a mistake because that's what makes us human.

Do children understand that nuance? I would have thought they would associate people falling with laughing

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

#379

Post by yreg »

gonehome wrote: post #206
ortusdux wrote: post #4

I still cannot get over this product. They whole selling point of a dyson fan is the 'air multiplier' tech, which creates a low pressure zone that propels air through the ring. According to dyson, this tech can move 15x more air than the fan in the base of the unit. Why in the world would you build an air filter around a system that does not directly interact with 93% of the air it moves? https://www.jameco.com/Jamec…

The fan also sucks compared to something like a Vornado. "Buffeting" of air is not a practical issue when using a fan - you want a fan that can create a lot of air flow. The Dyson fan comes across form first then making up reasons to explain the form retroactively. It feels like an interesting look is the goal rather than something that's actually better. Am I wrong about this? Do people that have the fan like it? Is…

Why is Molekule a fraud?

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

#380

Post by kevstev »

damontal wrote: post #330
kevstev wrote: post #129

Earlier quoted context omitted.

Do you have any more info to back this? I am honestly curious- I bought a Dyson Animal about 12 years ago now, and its still going strong, and is the best vacuum I have ever used. Not having to keep bags around is nice too. Our usecase is relatively light- we have area rugs mostly, but its still head and shoulders above the previous vacuum we had, and any of the ones my parents had growing up.

how do you dump your cannister? i empty mine after every use and it always releases dust into the air. bagged seems much better as it just keeps the dust inside.

I just do it over the garbage can, the cannister is removable and just flips open up top. I guess some dust escapes, but its mostly contained. The cannister being clear, its also very transparent as to when its full and needs to be emptied. Its been awhile, but I remember this being problematic on my previous units- the "indicator" mechanisms didn't work very well, so you eventually ignored them, until suction was noticeably deteriorated, then you finally changed out the bag and it felt like you had a new vacuum.
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