The amount by which an air conditioner can lower the temperature in your house depends on various factors, including the capacity of the air conditioner, the temperature outside, the insulation of your house, and the desired temperature setting. Generally, air conditioners are designed to provide a cooling capacity of around 20 to 25 degrees Fahrenheit (11 to 14 degrees Celsius) below the ambient temperature.
For example, if the temperature outside is 90 degrees Fahrenheit (32 degrees Celsius) and you set your air conditioner to 72 degrees Fahrenheit (22 degrees Celsius), the air conditioner would aim to lower the temperature by approximately 18 degrees Fahrenheit (10 degrees Celsius).
It's important to note that achieving the desired temperature may take some time, especially if there is a significant temperature difference between the inside and outside of your house. Additionally, extremely high temperatures or inadequate insulation can affect the performance of an air conditioner and limit its ability to cool the house to the desired temperature.