Rock the Gas Heat ESCO Exam 2026 – Fire Up Your Future in HVAC!

The fan speed for a cooling or heating system should be set according to the CFM (cubic feet per minute) specified on the data plate. This is because the data plate indicates the appropriate airflow needed to effectively cool or heat a room. Setting the fan speed based on the room temperature (B) or the blower motor speed (C) may not provide the necessary and efficient airflow. Additionally, setting the fan speed based on visual inspection (D), such as how strong the air is coming out of the vents, can be misleading and may result in inadequate cooling or heating. Therefore, it is important to refer to the data plate for the correct CFM and set the fan speed accordingly.