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Frequently asked questions

How does Air Multiplier™ technology work?

1)  Air is drawn in by an energy-efficient, brushless motor

2) A high velocity jet of air exits the loop amplifier and creates an area of low pressure that draws in air from behind the fan. 

3) As the jet of air leaves the front of the loop amplifier, more air is drawn from the surroundings due to ‘viscous shearing’, amplifying the initial airflow even further.

How does Jet Focus technology work?

Jet Focus technology utilises the Coanda effect.

In personal heating mode, a jet of hot air is ejected from the main aperture at the back of the product. Using the Coanda effect, this jet of air flows over the ‘bend’ and ‘ramp’ surfaces within the loop. At the front of the product, this jet is redirected by a focus ramp to channel the air straight ahead of the product.

In the whole room heating mode, an additional jet of air (the control jet) is ejected from a second aperture close to the front of the product. This control jet entrains the slower moving, main hot air jet and the combined jet flow is attracted towards and sticks to the 45 degree chamber at the front of the product.  This is the second use of the Coanda effect and results in an overall spreading of the hot air over a wide angle in front of the product.

How are Dyson Air Multiplier™ fans different to conventional fans?

The fan had remained unchanged for over 100 years. Conventional fans can be inefficient and chop the air. They can be difficult to clean, noisy, and have a high centre of gravity – making them prone to falling over.

Air Multiplier technology gives an uninterrupted stream of air - no choppy airflow. With its simple loop the fan is quickly wiped clean with a cloth. Fans with blades are nigh on impossible to clean, with dust and dirt building up inside the cage.  The same dust and dirt is then billowed into your face when the fan is switched on. 

Unlike top-heavy conventional fans, Dyson bladeless fans have an energy-efficient motor in the base, meaning they have a low centre of gravity and won’t topple over.  The Dyson Air Multiplier™ fan adjusts easily with the touch of the hand.  It pivots on its low centre of gravity and stays put.  

What is different about the Dyson Hot+Cool™ Jet Focus fan heater?

Jet Focus technology gives the user the ability to switch between fast whole room, or long reach personal heating. The Dyson Hot + Cool™ Jet Focus fan heater amplifies airflow to heat or cool you fast.