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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

#591

Post by MrYellowP »

mPReDiToR wrote: post #537
brian_cunnie wrote: post #488

Earlier quoted context omitted.

I didn't put a key in an electrical outlet, but in Paris when I was a kid I was having trouble sticking the plug in the 220V outlet so I held it tight by the prongs & plugged it in & boy did that feel weird. I never did that again. I never told my parents about it because I would have gotten yelled at. At camp we put crickets on the electric fence, but nothing happened to them, so I grabbed the electric fence, and th…

Some childhood anecdotes... One xmas when I was less than 5yo I jammed a knife into our 240v socket and blew the fuse on the Electricity Board side of the fusebox. They had to send an engineer out to turn the power on so we could continue cooking the turkey. The other is from a sibling comment. With primary school, 10 years old, we went to the Lake District and were introduced to electeic fences by everyone holding h…

> until I flew across the room

What? Why?

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

#592

Post by dec0dedab0de »

flak wrote: post #590
dec0dedab0de wrote: post #394

Earlier quoted context omitted.

I had the dyson fan with the heater and filter for a short time, as well as a medify. I was disappointed with both, and returned them. The dyson looked cool, but the heat function was kinda useless unless you sat right next to it. i might get another one without the heat. The medify seemed to work well, but it felt like it was poorly made. I kept thinking I could probably diy something just as good. Though the main r…

Stopped shaving?

I was referencing a razor scheme. when you sell something cheap but the part you need to use it is locked down and expensive. Like the blades for a razor, or ink for a printer. Or filters for an air purifier.

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

#594

Post by rmason »

alasdair_ wrote: post #580
rmason wrote: post #475

Earlier quoted context omitted.

I watched my dad putting on a rubber glove to pull out a single prong from a broken plug stuck in an electrical outlet. I was perhaps 2-2.5 years old. I asked why he needed the glove. My Dad with his wry Irish humor said it was to get a strong grip. I told him that I thought I could do it without the glove. He told me to give it a try and I did. What I did was promptly fall on my ass and that's how I learned the powe…

Was your dad actually Irish, or was he from America? The Irish use 240V and that shit will kill you.

Dad was an American but strongly identified as Irish. He said my great grandfather who I never knew spoke with an Irish brogue.

When I was 16 I was working on my ham radio's linear amplifier. I was certain that I had shorted all the capacitors but one still held a charge and once again with much more force knocked me on my ass.

For days I could see the line up my arm where the electricity travelled. After that I always grounded the capacitors three times just to be sure!

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

#595

Post by Maursault »

Bakary wrote: post #199
bluGill wrote: post #163

Earlier quoted context omitted.

I'm more worried about the random friend who drops by. Sure we wear a mask, but when can we take it off when they are gone?

You have to make sure the filter is HEPA, and calculate whether the device has had the time to do a full air change given the room size and its CADR rating. Viruses are generally too small for even the best filters, but the droplets that carry them are well within what a HEPA filter can manage.

> Viruses are generally too small for even the best filters...

The average diameter of coronavirus particles is around 0.12 μm. The diameter of the envelope is 0.08 μm and the spikes are 0.02 μm long.

A P100 HEPA filter will remove as much as 99.97% (for P95 it is 95%) of all airborne particulates with an aerodynamic diameter of 0.3 μm, and particles both larger and smaller are removed with an efficiency greater than 99.97%.

Even if viruses are smaller than 0.3 μm, they are an easy target for HEPA filters.

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

#596

Post by MingLEnF »

hnick wrote: post #436
dwaite wrote: post #301

Earlier quoted context omitted.

They'd probably do it no more than ten times.

I just feel bad for all the kids who won't feel the joy of talking into a fan and making a funny voice :(

I guess you haven't had chance to join a conference call (Zoom, BlueJeans, Hangouts ...) where someone has a fan running in their relative vicinity?

At first I also didn't know why is one of colleagues sounding "weird" - never would've thought they had their fan running, until one product manager asked "Hey X, do you have a fan running nearby?"

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

#597

Post by MingLEnF »

tw04 wrote: post #435
Judgmentality wrote: post #324

Earlier quoted context omitted.

Plenty of people raise their kids this way. When I see parents laugh when their kids fall down instead of panic, I smile. And the best part? The kids smile too, because they're actually looking to their parents for how to react. I'd rather raise daredevils than anxious wrecks. My best friend has a kid who's always climbing on stuff, falling down, getting hurt. That kid is going to grow up to be awesome.

Plenty of people need to rethink their parenting then. I laugh when my kid falls down. I scream when I saw my kid trying to stick a key into an electrical outlet, and I screamed when I saw my kid trying to put a finger into a vornado fan. Modern fans aren't the same as the box fans we grew up with. And adult would likely walk away with an emergency room bill and a bunch of stiches. A small child would likely lose a f…

As a kid - I've put two really long (sweater sewing) needles into power outlet.

I guess luckily I hit earth/ground with one of them - since we had differential (RCD) circuit breaker(s) installed it just shut off electricity in the apartment.

If I managed to hit both into real live and neutral - the differential breaker wouldn't have done a thing, and I wouldn't be typing this.

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

#598

Post by thr0w__4w4y »

m463 wrote: post #511
hnick wrote: post #436

Earlier quoted context omitted.

I just feel bad for all the kids who won't feel the joy of talking into a fan and making a funny voice :(

too many things have been lost or gimped. Chemistry sets, m-80s, model rockets, playgrounds, coaster brakes, whatever kids did before "play dates" and anything intricate with small parts.

Familiar with all in your list, plus I'd like to add a few:

Lawn darts, BB guns, wrist rockets, bottle rockets (I know you said M-80s, I had those too, but bottle rockets could be shot at friends), can of WD-40 (with requisite red straw) plus a lighter, backyard archery set.

Love you Mom and Dad! 70s were great!

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

#599

Post by bluishgreen »

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…

I use it as a white noise machine, I find the particular noise it gives out to be calming. The heat is also nice, not biting. It could be after the fact rationalization for blowing 250$ on a 25$ equipment.

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

#600

Post by bluishgreen »

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…

Fallacy! The air stays in the room and will be cycled into the filter 7% at a time. Given the output volume and the typical volume of a room, this could be multiple times every hour.
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