High-torque DC motors are used in our blower units to provide powerful airflow while consuming a fraction of the power used by traditional AC motors. This technology is a key reason why the Bravo Milano 24,000 BTU Universal Floor/Ceiling is so remarkably quiet. These motors are found in every head of our Multi-Zone systems, allowing for granular control of fan speeds in every room. To protect the electronics that drive these motors, we recommend checking the Accessories section for high-quality electrical disconnects. If you are wall-mounting your indoor units, the stability provided by our Installation Kits prevents any motor vibration from reaching the wall. These motors are designed for 100,000 hours of operation, providing peace of mind for the homeowner. It is a prime example of how we use DC technology to improve residential comfort.