How long should it take to cool a hot house down to 78 degrees?
The length of time to cool a home depends on how hot it is outside and how long the unit has been off. Your air conditioner may run non-stop when outdoor temperatures are over 95 degrees. If it is 90 degrees outside at 5 oclock at night, and you return home and start cooking, you A/C may run until 10 oclock at night or later, before it will shut down.