Cooling towers for data centres, hospi­tals or indus­trial facil­i­ties have increased the effi­ciency require­ments. If modern EC motors are used instead of AC tech­nology, energy consump­tion and oper­ating costs can be signif­i­cantly reduced. In addi­tion, it is worth switching to EC fans from ebm-papst because their speed is infi­nitely vari­able, they offer networking options and can with­stand harsh envi­ron­mental condi­tions.»