01782 349 430
External rotor motors are usually contained within the depth of the fan impeller, thus saving the space normally occupied by a standard motor. They are located in the air stream, so temperature is limited, and are generally of protection class IP44, so the air needs to be clean and dry to avoid motor contamination.
Backward-curved motorised impellers develop pressure within the envelope of the impeller and do not therefore rely on a scroll housing for this purpose. They are of relatively low cost and can be simply and cheaply housed. Air is drawn through a radius inlet ring, which minimises pressure losses and air leakage, and is discharged at 90° to the inlet axis. The impeller has a ‘non-overloading’ characteristic in that it draws maximum power near the centre of its pressure/volume flow curve.
Low cost speed control is possible by supply voltage variation, either by electronic (triac) method or by transformer.
Air filtration, fume control, electronic cabinet cooling, lamp cooling, solarium equipment, roof extract units, in-line duct fans, high pressure coils, air conditioning cassettes, refrigeration equipment.
Our RRE/RRM range of high performance free running impellers begin at 133 mm up to 280mm. Fitted with EC motors with a performance range of 0,12 KW to 6.6KW, they are speed controllable and offer a constant high degree of efficiency even under partial load.
RRE – Motorised Impeller
RRM – Fan Module With Mounting Stand
Please note that all request a quote submissions will be contacted by one of our product engineers to ensure correct fan selection and to take additional details. This will be used to determine the correct fan for the project
The E-series impeller design produces significant increases in energy efficiency and major reductions in operating noise levels. It features seven aerofoil design blades for high air flow and low to medium pressure applications such as computer room air conditioning, air handling, energy recovery units,box and roof fans. Energy efficiency is increased by 4% and the noise level lowered by 3 to 5 dB depending on system airflow and static pressure. When combined with our EC motors, the E Series make a very compact, efficient and optimally designed fan unit for your application. The E Wheels are made of plastic.
GKHR – Motorised Impeller (EC)
GKHM – Fan Module / Plug Type (EC)
EKHR / DKHR – Motorised Impeller (AC)
EKHM / DKHM – Fan Module (AC)
The B-Wheel design can increase efficiency by up to 6% and reduce noise by three decibels compared to the standard eight-blade design. The B Wheel can offer more air at a higher pressure. Sizes range from 250 mm to 630 mm. With the enormous efficiency advantages of this series of impellers, users can easily meet ErP requirements. All B Wheels are made of aluminium.