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External rotor motors are usually contained within the width of the fan housing, 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. Some of the smaller double inlet fans are IP54 protected to enhance the dust protection, and are resilient mounted at each shaft end to reduce the transmission of vibration.
Low cost speed control is possible by supply voltage variation, either by electronic (triac) method or by transformer. Detachable discharge flanges enable 'without flange' or special mounting arrangements to be specified.
Air filtration, fume control, heating and cooling coils, small air handling units, solarium equipment, special effects equipment, electronic heatsink cooling.
Single and three phase models
Forward and backward curved models
Efficient, low power consumption motor Low cost speed control Slim and standard scroll housings
Discharge flange or scroll brackets
Ø120 to 560 impeller
26000m³/h range maximum
1300 Pascals range maximum
