How Many Fan Blades are Best?
Your fan’s magic number
When it comes to the number of blades on a ceiling fan, what is the correct amount? 2, 3, 4 or 5 blades? More importantly, does this even make a difference?
The truth is that it doesn’t, but it also does.
While this may not make very much sense straight off, it makes sense to split a ceiling fan into two purposes; function and design.
From a functioning point of view, the amount of blades your typical ceiling fan has does not impact its performance a great deal. Sure, if we compared two completely identical fans with one having an extra blade, that would contribute to its airflow. However there are so many other factors that come into play that impact on a ceiling fans overall performance.
Some of the thing to look out for in a ceiling fan in terms of function are they strength of the motor, the blades degree of pitch and shape, as well as the blade length, but how do these factors contribute?
First of all the strength of the motor in most cases dictates how fast he fan will spin. For an average sized fan the higher the rpm (revolutions per minute), the faster the fan will go. This is a really good first indication of the ceiling fans motor strength. The rpm of the fan can also be compared with the power usage, the wattage. A fan with an average or low rpm, but with a high wattage means that it is using a lot of energy but is not spinning very fast. Conversely a fan with a high rpm and low wattage means that it is highly performing while using less power. This therefore means that it is very efficient; this is often seen in DC ceiling fans.
Another important indication is the airflow of the fan, which essentially indicated how much air the fan delivers. For ceiling fans, an average airflow may be around 10,000 m3/h (cubic meters per hour). This measurement is great for comparing the overall performance of the fan when the air movement is most critical.
The blade itself also has influence over the fans performance. Ceiling fan blades come in all shapes and sizes; some plain and flat while others are designed with a curve. Generally speaking the higher the degree of pitch of the blades, that is the higher the angle at which it is mounted to the fan, the more air that the fan will supply. Another factor is the blades shape, some newer fan designs, such as the Hunter Pacific Aeroforce ceiling fan for example, have blades that scope the air as the fan turns. This not only pushes the air around, but is also able to effectively move it across the room. Similarly metal fans such as the Hunter Pacific Typhoon Metal has thin yet strong blades with a high degree of pitch. These are able to slice through the air that push the air with high strength. Lastly the length of the blades, which is mainly important to factor when selecting the right fan. The length of the blades often determines how fan the fair will spread away from the ceiling fan. For a more detailed look into ceiling fan sizes read our post on The Perfect Fan Size for the Perfect Room.
So finally, if the amount of blades doesn’t impact the performance of a ceiling fan, when is it important?
The answer is the design, more specifically the looks and feel of the fan fitting into your room décor. Whether it is 2 blades, 6 or even more, for this there are no measurements, no calculations, only your creative desires and unlimited imagination.