In most modern residential homes equipped with standard central air conditioning systems, it is generally more energy-efficient and cost-effective to let the thermostat maintain a steady temperature rather than turning the unit completely on and off throughout the day. When you turn the AC off, your home absorbs heat, and forcing the system to work at maximum capacity to cool down a hot house consumes more energy than letting it run intermittently to maintain a stable climate. However, using a programmable or smart thermostat to automatically raise the temperature by a few degrees while you are away at work or asleep provides the best balance of comfort and energy savings.
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