The ideal thermostat setting can vary depending on personal preferences, but there are some general recommendations for both summer and winter. For summer, the U.S. Department of Energy suggests setting the thermostat to 78 degrees Fahrenheit when you are at home to stay comfortable and save money. Energy.gov also recommends a range of 70 to 78 degrees Fahrenheit for the ideal home temperature, and suggests raising the thermostat or turning it off entirely when you are away to maximize energy efficiency. In the winter, the ideal thermostat temperature is around 68 degrees Fahrenheit when you are at home, and lowering it while youre asleep or away can help save energy and reduce heating costs. Its important to consider your daily schedule and adjust the thermostat accordingly, such as setting it to a lower temperature about an hour before bedtime and raising it before waking up. Programmable thermostats can also help regulate the homes climate and save on energy costs, as they can be set to run on cycles and adjust temperatures based on your schedule. Ultimately, the thermostat should be set to a comfortable temperature for the occupants of the space, taking into account personal preferences and energy efficiency.