EAO Ltd, market leading switch manufacturer and Sanyo Denki’s UK representative, now offers pulse width modulation (PWM) speed control technology with its range of Sanyo Denki San Ace cooling systems. PWM allows a fan’s rotational speed to be adjusted in order to deliver high efficiencies for cooling, power saving and noise reduction. PWM technology has been developed to save energy. The technology benefits equipment that must operate at optimal conditions 24/7. PWM allows fan speed to be externally controlled by a constant input frequency within a varying duty cycle of between 0% and 100%. EAO offers San Ace products featuring PWM in a range of sizes from 40mm square and 28mm thick to 172mm square and 51mm thick. The range delivers extremely high cooling capacities, producing airflow from 24cfm to 300cfm. PWM frequency is available from 16KHz to 25KHz.