Test results for a unique helical fan/pump have shown improvements in performance, in particular volume and pressure, compared with standard centrifugal, axial and even mixed flow fans of similar dimensions. It has also shown improved noise level and power consumption. In addition, it’s size, shape and flow path offers more versatility in certain applications.

The helical fan was originally designed  for the solar wall ventilator that posed restrictions on available space and shape, and needed to be very quiet with low power consumption.

A number of the products described in this presentation, such as the solar wall-integrated ventilator (p9) would not be effective without such a fan. . The fan developed as a result of demands for a solution for our solar wall ventilator

Following the development of a roof-mounted solar ventilator, Sojol began to develop a wall-integrated solar ventilator that would enable solar ventilation applications in facades such as apartments, hotels, etc. However, the size and shape limitations of a wall cavity caused great challenges in particular in the quest for an appropriate fan.

Adequate filtration requires a fan capable of greater pressure than what is currently available on the market globally for the shape and size required in a wall cavity. A standard cross flow fan was considered but it didn't provide a direct cross flow path from side of the axis to the other, nor did it produce the pressure we required. We also considered a series of axial and/or centrifugal fans, but this was impractical as we would need seven of these and even then these would not meet the pressure required.

So after an unsuccessful global hunt for a fan, Sojol developed its own very unique fan.

This fan/pump belongs to an entirely new family. With tests so far showing that it can out-perform centrifugal, axial and even mixed flow fans, it is likely to be widely taken up in the future in many fields including in the renewable energy sector.