The benefits of high-volume low-speed (HVLS) fans are well understood, and there are many different brands and models available in Australia. But what are the features that make one HVLS fan stand out from the crowd?
According to Arbon Equipment, there are three key design features to look out for.
First comes the design of the blade. And as the purpose of the fan is to move large volumes of air, the aerodynamics clearly play a major part. The ideal blade design produces uniform pressure and velocity over the whole length of the blade. Nonuniform pressure and/or velocity will cause backflow and increase energy consumption. The number of blades does not necessarily matter: it is the best design of blade that will move the most air over the largest area.
Secondly, and equally important, comes the way in which the fan blades are mounted and the construction of the hub. And while a tight, solid connection between the blade and hub is important, mounting designs using a pivot with vibration damping material provide longer life than rigidly mounted blades. The hub itself needs to be strong enough for the task, and so milled hubs are preferred to castings.
Thirdly, and possibly more important, comes the safety design of the fan. Here, the ideal design should involve a three-way motor-to-hub safety connection to safeguard the health of anyone under or near the fan.
A well designed HVLS fan will always outperform an inferior model. But it is equally important to ensure that the fan you choose is correctly specified for the task. And there is no substitute for obtaining professional help in analysing the airflow requirements and choosing the correct specification for the job.
Arbon Equipment supplies the Rite-Hite range of HVLS fans, and can recommend a solution that is best suited for a specific application.
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