DC Fans More than 15 years Delta has gained industry's recognition, confidence and commendation by continuously offering innovative quality brushless DC air cooling products. Broad product range covers axial fan from 25mm-170mm, blowers from 45mm-160mm, cross-flow fans and slim blowers. In combine with patented distinctive blade design, innovative structure design and "Sensflow" control not only greatly increase cooling performance but also reduce system noise with temperature sensor control when the fan is in low load operation. Fans with hot-swap construction, fan trays and modu