A widely recommended and energy-efficient temperature to leave your air conditioning set to throughout the day when you are home is 78 degrees Fahrenheit or approximately 26 degrees Celsius. This specific setting provides a comfortable indoor environment while maintaining a manageable balance between cooling comfort and electricity consumption. If you are away from home for work or running errands during the day, experts recommend raising the thermostat setting by about 7 to 10 degrees or programming a smart thermostat to reduce cooling intensity, which can save up to ten percent a year on heating and cooling energy costs. At night, many people prefer slightly cooler temperatures around 70 to 72 degrees Fahrenheit to promote better sleep quality, provided the home is well-insulated.
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