A 12 V automotive HVAC blower motor is compact, widely compatible, energy-efficient, and cost-effective—delivering adjustable, reliable airflow even at idle, with modern brushless designs offering quiet operation and long lifespan. In contrast.
A 24 V blower motor draws half the current for the same power, enabling thinner wiring and reduced heat loss—beneficial in heavy-duty vehicles—though it may require converters and has fewer off-the-shelf components.