radi0j0hn
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As some kid claimed a long time ago about the all refurb Dyson vacs, some of these fans have been returned because "old people can't assemble them." Agnes, where are the dang-gummed blades? They must have left them out of the box! Take it back!
acpress.com Not cute, but useful.
radi0j0hn
quality posts: 79
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rareskills wrote:Why are these so expensive... tanga.com has an off-brand usb one for 15 bucks haha
Because it's an off brand USB one and this says "DYSON."
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radi0j0hn
quality posts: 79
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sdc100 wrote:Dyson already makes a heater based on the same principles as this fan. In fact, Woot has offered it at least once.

That is almost as big a rip off as the IR heaters that are the fad in multi-level marketing sphere these days.
acpress.com Not cute, but useful.
snooty2toes
quality posts: 4
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sdc100 wrote:As an actual owner, a scientist, a card-carrying skeptic and a Research Analyst by profession (I debunk, design and manage medical studies for a living) -- I disagree.
See my review.
oh oh totally off topic but do you have any thoughts on how an inversion table works for spinal traction?
presenting you a subliminal message about the awesome that is sausage
Anorion
quality posts: 35
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sdc100 wrote:I completely disagree. Compared to my standard axial fan of equal wattage, the Dyson's air stream goes further and has more pressure. That's due to 3 reasons:
1) The Dyson uses a vane-axial fan in its base which is more efficient than a common unenclosed axial fan. The vane-axial design puts a standard fan inside a tube, which prevents air backflow (aka tube-axial fan). Then vanes straighten the flow, further improving pressure and efficiency. This design requires smaller (thus lighter) blades. The Dyson's ring then increases airflow further using Inducement and Entrainment. These effects are real, as can be seen by holding a strip of paper behind and beside the ring. In a standard axial fan, there is too much turbulence for Entrainment to be significant. And Inducement is a non-issue since the blades pull air through, not the Bernoulli Effect.
2) A standard fan's airflow is very diffuse and there is backflow (where outgoing air is sucked back into the back of the fan). The Vornados prevent this somewhat by focusing the air into a vortex. The Dyson also uses a more focused beam and more pressure (due to the above vane-axial fan) so backflow is unlikely. This means more air goes to its intended target.
3) The Dyson is especially efficient when compared to standard top-heavy oscillating fans. With a heavy motor on top, it takes tremendous torque to move the head side to side. That uses a lot of energy. Prove this to yourself by trying to move the head with your hand at an angle. The Dyson has its motor on the base, and it's a pretty light motor. Turning it side to side is easy, and much less energy is needed.
All of these mean that the Dyson fan outputs more air further with greater pressure than a standard axial fan using the same amount of electricity.
You have obviously never used a Vornado fan. I'd take one of those over this crap any day.
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THINK OF THE SNAILS YOU ARE PUTTING OUT OF WORK!
Certified Linux Chemist Guy.
If I hated Apple products any more than I do, I'd be on lists.