When an air conditioner is operating, what is the typical temperature drop of the house air across the evaporator coil?

Prepare for the InterNACHI Home Inspector Test. Study with multiple choice questions, hints, and explanations. Equip yourself for success!

The typical temperature drop of house air across the evaporator coil when an air conditioner is operating ranges from 14 to 22 degrees Fahrenheit. This range reflects the efficient heat exchange process that occurs within the evaporator coil. When warm air from the home passes over the evaporator coil, the refrigerant inside the coil absorbs heat from the air, causing the air temperature to drop significantly before it is circulated back into the living space.

In properly functioning air conditioning systems, maintaining this temperature drop is crucial for effective cooling and energy efficiency. A drop outside this range may indicate an issue with the system, such as insufficient airflow, a refrigerant leak, or problems with the evaporator coil itself. Operating within the 14 to 22-degree range ensures that the system is effectively removing heat from the indoor air, contributing to a comfortable living environment.

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