Increasing the size of a blower pulley will result in what effect on airflow?

Increasing the size of a blower pulley will decrease airflow. This phenomenon occurs because the pulley size directly influences the speed of the blower motor. A larger pulley will cause the blower to rotate more slowly, which in turn reduces the amount of air being moved through the system.

In blower systems, airflow is dependent on the relationship between the blower speed and the volume of air displaced. A slower blower speed diminishes the system's ability to move air effectively, resulting in decreased airflow. This relationship is crucial for understanding ventilation and heating systems where precise airflow is necessary for optimal performance.

The other options relate to different aspects, such as electrical flow and temperature regulation, but they do not accurately reflect the direct impact of increasing the blower pulley size on airflow. Therefore, the decrease in airflow is the most relevant outcome of increasing the blower pulley size.