Visit for more info.br br Simon explains the importance of Fan Efficiency. Typically, 40-50 of all power consumed in most buildings is consumed by fans. br br He gives an overview of high-efficiency fan selections by showing the inside of an air conditioning unit where an EC plug fan is used. EC plug fans are being used in a range of air conditioning and air handling units. br br By comparing EC and AC motors according to the Australian Minimum Energy Performance Standards (MEPS) he shows that EC motors are 15-20 more efficient and therefore important for increasing energy efficiency, even under speed control.