What is the significance of the temperature differential in HVAC systems?

The temperature differential in HVAC systems is crucial because it directly indicates how effectively a system is heating or cooling a space. This differential is the difference in temperature between the air entering and leaving the system or the chilled water entering and leaving the coil. A larger temperature differential typically suggests that the system is operating efficiently, providing adequate heating or cooling to meet the demand of the space. It serves as a key performance indicator, allowing technicians to assess whether the equipment is functioning as intended and whether it can effectively maintain the desired indoor conditions.

Understanding the temperature differential helps in diagnosing potential issues within the system, such as blockages, insufficient air flow, or failing components, which could compromise comfort and system efficiency. By monitoring this differential, commissioning technicians can also validate that systems are installed and operating according to design specifications and ensure optimal performance throughout their operational life.