Does Adjusting the Thermostat Really Save Energy?

Adjusting the thermostat is one of the most effective ways to reduce home energy use. Lowering or raising the temperature at night or when you're away allows the heating or cooling system to work less, saving energy. According to the U. S. Department of Energy (DOE), a temperature adjustment of five degrees for an eight-hour period can save up to five percent on heating or cooling costs.

Setting things straight

A common misconception about adjusting the thermostat is that your furnace or air conditioner must work harder than normal to return the space to a comfortable temperature, resulting in little or no savings. This belief has been dispelled by years of research conducted by the DOE and other organizations.

The energy required to reheat or recool a home is roughly equal to the energy saved as the temperature drops to the lower or higher setting. The energy savings is realized during the temperature setback or setforward period. Therefore, the longer your home remains at the adjusted temperature, the more energy is saved.

A smart way to save

While other factors contribute to the amount of energy required to heat or cool a home—including insulation, windows, ventilation and climate—adjusting the thermostat is a no-cost, effective way to save on your energy bills.

Programmable thermostats add convenience and optimize savings by adjusting temperatures automatically. Newer "smart" thermostats include advanced features, such as self-programming and remote control.