What is considered a normal temperature split between supply and return air in an air conditioning system?

The normal temperature split between supply and return air in an air conditioning system is typically in the range of 15 to 20 degrees Fahrenheit. This temperature difference indicates that the air conditioning unit is effectively removing heat from the indoor air, contributing to the overall cooling process.

To understand this better, the supply air is the cooled air dispensed into the living space, while the return air is the warmer air that flows back into the system to be cooled again. A split of 15 to 20 degrees indicates that the air conditioning unit is performing efficiently, ensuring that it is extracting sufficient heat from the indoor environment while maintaining comfortable temperatures.

If the temperature split were to fall outside of this optimal range, it could indicate potential issues with system performance, such as problems with airflow, refrigerant levels, or system efficiency. Monitoring this temperature difference is crucial for HVAC technicians to diagnose and maintain a well-functioning air conditioning system.