Is it OK to turn off thermostat in summer?

Is it OK to turn off thermostat in summer?

As the summer heat rolls in, many homeowners find themselves wondering whether it’s acceptable to turn off their thermostat. After all, why waste energy cooling an empty house? While the answer may seem straightforward, there are several factors to consider before making a decision. In this article, we will explore the pros and cons of turning off the thermostat in summer, backed by research, case studies, and expert opinions.

The energy-saving argument

One of the primary reasons homeowners consider turning off their thermostat during the summer is to save energy and reduce utility bills. According to the U.S. Department of Energy, heating and cooling account for nearly half of the average household’s energy consumption. By turning off the thermostat, homeowners can potentially save a significant amount of money.

However, it’s important to note that completely shutting off the thermostat may not be the most efficient approach. When a home becomes too hot, it can take a considerable amount of energy to cool it back down to a comfortable temperature. This sudden surge in energy usage can offset any potential savings from turning off the thermostat.

The impact on indoor air quality

Another factor to consider is the impact of turning off the thermostat on indoor air quality. When the thermostat is turned off, the air conditioning system is not actively circulating and filtering the air. This can lead to a buildup of dust, allergens, and other pollutants, which can negatively affect the health and well-being of the occupants.

Furthermore, high humidity levels can promote the growth of mold and mildew, which can cause respiratory issues and damage to the home. By keeping the thermostat set at a slightly higher temperature, the air conditioning system can continue to circulate and dehumidify the air, maintaining a healthier indoor environment.

The comfort factor

Comfort is a crucial consideration when deciding whether to turn off the thermostat. While it may be tempting to save money by enduring a warmer indoor temperature, it’s essential to prioritize the well-being and comfort of the occupants.

Research has shown that excessive heat can have a detrimental effect on sleep quality, productivity, and overall well-being. According to a study published in the journal Nature Climate Change, higher indoor temperatures can lead to increased irritability, decreased cognitive function, and reduced physical performance.

By keeping the thermostat set at a moderate temperature, homeowners can ensure a comfortable living environment and promote better sleep and overall well-being.

Alternative strategies

If turning off the thermostat completely is not the best option, there are alternative strategies that can help save energy while maintaining a comfortable indoor environment:

  • Use a programmable thermostat: A programmable thermostat allows homeowners to set different temperature levels for different times of the day. This way, the air conditioning system can be adjusted to conserve energy when the house is unoccupied, while still ensuring a comfortable temperature when the occupants are present.
  • Utilize natural ventilation: Opening windows and using fans can help circulate fresh air and create a cooling breeze, reducing the reliance on air conditioning. This approach is particularly effective during cooler evenings and early mornings.
  • Invest in energy-efficient appliances: Upgrading to energy-efficient air conditioning units and appliances can significantly reduce energy consumption and lower utility bills. Look for appliances with the ENERGY STAR label, which indicates superior energy efficiency.


While turning off the thermostat in summer may seem like a simple solution to save energy and money, it’s important to consider the impact on indoor air quality and overall comfort. Instead of completely shutting off the thermostat, homeowners can explore alternative strategies such as using programmable thermostats, natural ventilation, and energy-efficient appliances.

By finding the right balance between energy savings and comfort, homeowners can create a more sustainable and enjoyable living environment during the summer months.

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