The range of large box fans has for many years been used mainly in green houses and the poultry industry. They are now rapidly making their mark in the ventilation industry. The reason is obvious. This ‘gentle giant’ moves large volumes of air, silently and at a fraction of the cost of conventional large propeller or axial fans. The range of box fans are available in two common diameters, 915mm and 1270mm.
The impellers are v-belt driven by motors ranging from 0,55kW to 1.10kW. Two different styles compliment the range. This version has a rear guard and front gravity operated louvers. These units can be mounted in factory and warehouse walls and serve as extractor fans. In special applications, this unit may be mounted in a roof top extract system.
The square fan housing and bellmouth-entry plate are made of strong galvanised sheet steel. The 6 bladed impeller is statically and dynamically balanced for low noise and vibration free operation. The impeller is available in stainless or galvanised sheet steel. The impeller is attached to a large v-belt pulley in which is embedded a double ball bearing assembly, protecting it against water. The belt transmission delivers low impeller rpm, which ensures high efficiency, low energy consumption as well as low noise. The units are fitted with standard metric aluminum cased motors, available in 220volt or 380volt 50Hz. The motors are protected to IP55 standards allowing them to be operated in moisture and humid air.