this post was submitted on 21 Jul 2026
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Its true there is a fan in the base of all bladeless fans, but the fan is smaller then traditional fan designs and moves the same if not more air then traditional fans.
Air is pulled in through the base and forced through a thin slit. This fast stream of air creates an area of low pressure, drawing in and amplifying surrounding air behind the slits.
Because air "sticks" to itself, when you get some air moving (by breathing out, for example), the initial bit of air that you move "drags" some air with it from beside and behind. This is what Dyson calls "air multiplier technology".
Dyson uses this property of air to claim that they only have to move a fraction of air (with the fan in the base) of all the air that blows past you.
Here is a example of how this works, and how you can use one breath to fill a large bag.
https://www.youtube.com/watch?v=rAAelB7nN14
Here is a image of the multiplier effect, from the original intake of air at the bottom. You can see the air is multiplied from behind and infront of the fan.
still a miss-labeling to call them bladeless fans, just because the blades are hidden. by that logic my beef raviolis are vegetarian (tbf: the catholic church made a similar claim during the medieval ages).
Bernoulli Fan is not only more accurate, it also sounds much cooler.
This is such a rollercoaster to read LMAO
To play devil's advocate, there are no exposed blades at the point of use. I'd wager people who buy "bladeless" fans are more concerned with aesthetics and avoiding a crying toddler than they are with semantic accuracy. We call Wi-Fi "wireless" even though the router is plugged in.
Regular fans dont have exposed blades either, there is a mesh over it.
I take it you've never seen a toddler stick their fingers through the mesh
I can stick my peepee into a bladeless fan and not worry about cuts so there's that.
well, no, see, you can't.
you can stick it through it. but you can't stick it in it.
You can't tell me what I can and can't do with my own peepee.
Username checks out
at work we have expensive fans with a cheap metal mesh around them - to avoid a crying co-worker. at home i have a cheap tower fan with a weird plastic mesh - there are no visible blades on it except if i crank my neck into a really uncomfortable position and shine a flashlight into it. which one of the two can i call bladeless?
luckily i already have a devils advocate and @arctanthrope@lemmy.world dropped the name of god. how well do i need to hide my fans blade to create a Ventilationbescheißerle?
there's a type of German meat dumplings called Herrgottsbescheißerle, which literally means "little things that bullshit the Lord" for the same reason
Oh my god that makes so much sense suddenly
Well, Beef comes from cows, and cows only eat vegetation, so beef raviolis are vegetarian. Now, I’m not a Rocket Biologist, but I think the math here is pretty conclusive.
Is this what a rocket biologist specializes in?
The cynic in me thinks "bladeless" makes them easier to sell in fan-death countries.
Carpinchos (capybara) are fish.
Tesla sounded like a cool name for a car too...
You know ... Bernoulli Fan - that's way better idea than a room full of MBAs from expensive business schools and months of market research and focus groups with 2 way mirrors ever came up with. Well done
A traditional fan also pulls air from around its blades using the same principal. A bladeless is just a gimmick it has no actual benefits.
Here's a video on the subject:
https://www.youtube.com/watch?v=ySSo5PmZZJM
It turns out, a bladeless fan is even less efficient than a traditional one. It works better, when you remove the casing.
Thank you.
Much like Sharper Image's Ionic Breeze, this is a very expensive bullshit tower, but I am seeing them everywhere lately. Box fans are fucking amazing. Get a box fan.
Toddler hands don't go through the protection of a classic fan, if it's built like after 1965.
Also we were not discussing esthetics but efficiency.
Smaller fans = more noise
And why isn't a regular fan getting the "surrounding air" to move too? Is there a subscription for that?
It's most probably dyson bullshit (the moved extra air is slowing the original air down, or it's magic) marketing.
Magnets!
I got one years ago when they still were a lot cheaper and I must say it's the best one I ever had. It's powerful and so quiet that I can leave it running next to my bed when it's hot.
How much?
What?
HOW MUCH?
(Did you pay)
I don't really remember, it's been years. I think it was somewhere between 100-150€.
So 3-5 times a normal one... Kind of not cheap IMO, but if you like it...
I didn't say it was cheap, I said it was worth the price.
And what kind of fan could you get with that money.. Pretty sure I could get an industrial one that exchanges most of the air in my house in minutes or even seconds.
unironically love Lemmy for the explainers you get on a shitpost. Only stumbled on this cause I was looking it up myself. Thanks for the write up :)
Keep in mind, that the explanation is wrong.
Yep, dyson bullshit marketing.
Just like their hoovers then.
Used to have to use one and I just don't understand the bagless appeal. I like having a bag to contain all this awful dust. Felt like I needed to wash every time I emptied it and they fill up so fast in comparison too.
Sir, this is a ~~Wendy’s~~ shitpost community.
It’s the same reason I use a beef bouillon cube in place of real meat when I feed my vegan friends. It’s much smaller so it doesn’t count.
My god, the sass - it’s magnificent.
Fans are usually loud in proportion to their speed. Quiet ceiling fans have a big diameter and many blades. Doesn't a small fan cause a lot of noise?
Honestly depends on speed, quality of bearings and motor, blade geometry and thickness as well as any possible enclosures.
The biggest source of noise with fans is air cavitation.
I just imagined someone turning on a fan and hearing an electric f1 car drive by
i don't think the point of the post is about being useless or inefficient, but about the misleading name