A DC blower is an electric fan that uses direct current (DC) power to circulate air. DC blowers are often used in automotive, industrial and consumer applications, such as air conditioning, ventilation, and cooling systems. Unlike an AC blower, which uses alternating current (AC) power, a DC blower is able to run on a lower voltage and draw less power. This makes them more efficient, quieter, and more reliable than AC blowers. Additionally, DC blowers can be used in environments where AC power is not available.