The temperature of the air coming out of the vent can vary depending on various factors, including the specific HVAC system, the design of the ductwork, and the conditions in the surrounding environment. However, in a properly functioning HVAC system, the air coming out of the vent should be slightly cooler than the set temperature on the thermostat.
Typically, a well-designed air conditioning system will aim to achieve a temperature differential of around 15 to 20 degrees Fahrenheit (8 to 11 degrees Celsius) between the supply air and the return air. This means that if you set your thermostat at 74 degrees Fahrenheit (23 degrees Celsius), the air coming out of the vent would be around 54 to 59 degrees Fahrenheit (12 to 15 degrees Celsius).
It's important to note that these temperature differentials can vary depending on factors such as the efficiency of the HVAC system, insulation of the building, outdoor temperature, and the system's capacity to cool the air. Additionally, air distribution and airflow balance within the ductwork can also impact the actual temperature at the vent.
If you have concerns about the temperature of the air coming out of your vent, it's advisable to consult a qualified HVAC technician who can assess your specific system and provide accurate information based on its configuration and performance.