Do Bladeless Fans Move More Air? (are they good for air circulation)
Bladeless fans move more air than regular fans and a lot more air than they take in. This is all down to science or more specifically physics and works on the principles of fluid dynamics.
Now, what that means in plain English is that a bladeless fan takes air in through the base. That air is forced up inside the fan’s pedestal and through a series of narrowing tubes.
It is then forced out through slits in the ring at the top. After first passing over an edge that’s shaped like an aeroplane wing. The air is then forced out of the slits around the ring in such a way that it picks up air from behind the ring.
That air is caught up with the air from the fan which is why the leading manufacturer of bladeless fans, Dyson, now call their bladeless fans “Air Multiplier” fans.
They claim that their air multiplier fans move up to 15 times more air than is sucked in at the base.
The Science Behind Why They Move More Air Than Regular Fans
We mentioned the physical laws of fluid dynamics earlier and you thought that was all there was to it. Well, it kind of is, but, if you really want to understand how bladeless fans move more air, you’ll need to keep reading.
As the air flows through the slits in the ring at the top of the fan and out through the front, the air that’s behind the ring gets drawn in with the airflow. This is known as “Inducement” because the air that’s been pushed by the fan induces the air behind the fan to follow it.
The air around the sides of the fan will also follow the flow of the stream of air which is known as “Entrainment”.
It’s because of inducement and entrainment that bladeless fans move more air than regular fans.
SEE ALSO: The Best Bladeless Fans In The UK
Are Bladeless Fans Good For Air Circulation
According to the leading bladeless fan manufacturer, Dyson, due to something called the “Coanda Effect” which is how the air flows into and around the top ring, the air flows at an even greater speed than it should.
Which basically means that the air leaving the fan through the top ring is moving considerably faster than the air that enters through the base of the fan.
Dyson have claimed that their bladeless fans can produce an air speed of 55 miles per hour.
Added to the greater airflow and reduced turbulence in that airflow they create a powerful yet smooth flow of air. Making a bladeless fan a great choice for circulating air in your home.
How Much Air Does A Bladeless Fan Move?
The amount of air moved by a bladeless fan will of course depend on the make and model.
However, according to leading bladeless fan manufacturer Dyson, their bladeless fans can pump out around 290 – 370 litres of air every second.
This is made even more impressive when you consider that Dyson’s Air Multiplier pumps out 300 litres per second and only draws in around 20 litres of air per second.
Why Bladeless Fans Are Better At Moving Air
Unlike regular fan blades that chop the air as they move it, bladeless fans force a constant airflow through the ring. This makes a more consistent breeze with no falling away of air pressure.
Giving you a more consistent flow of air, that’s not constantly being interrupted.
Do You Have Any Questions?
We hope you found this article helpful, if you have any questions let us know in the comments below.
Frequently Asked Questions
Bladeless fans have an output of air that is far greater than the amount of intake air. Which means they move far more air than they take in.
Air flow from a fan can give the impression of cooling the air but the reality is a fan just circulates air at room temperature. You feel cooler when a fan is blowing in your direction because the air flowing over your skin allows the sweat to evaporate at a faster rate which cools you down.
Fans do not cool a room, all they do is circulate the air that’s already in the room. The only effective way to cool a room is with an A/C unit.