Three-phase motor in B-construction - full motor protection by PTC thermistor
	Double side suction with spiral housing
	Motor tensioning carriage
	Belt drive, V-belt pulleys with Taperlock tensioning bush system
	Flexible sealing between fan outlet and equipment chambers by means of airtight heavy canvas pipe
	Complete drive unit mounted on pressure loaded spring vibration dampers
	High performance impeller with rearward bent blades
	Statically and dynamically balanced impeller in accordance with DIN ISO 1940, quality classification G2.5
	Output specifications in accuracy class 2 in accordance with DIN 24166

	Single side suction
	Impeller direct on the motor shaft
	Rearward bent, dust-deflecting blades
	Output specifications based on measurements in accordance with DIN 24163
	Accuracy classification 2 in accordance with DIN 24166
	Strong welded steel plate construction, step welded
	Statically and dynamically balanced, balancing classification G 2.5 in accordance with DIN ISO 1940