What is the best setting for AC in summer?

What is the best setting for AC in summer?

As the scorching summer heat arrives, many of us rely on air conditioning to keep our homes and offices cool and comfortable. However, finding the optimal setting for your AC can be a challenge. Should you set it to the lowest temperature possible to beat the heat, or is there a more efficient and cost-effective way to use your AC? In this article, we will explore the best setting for AC in summer based on research, expert opinions, and real-world examples.

The Ideal Temperature

When it comes to setting the temperature on your AC, the ideal range for most people is between 72°F (22°C) and 78°F (25°C). This range strikes a balance between comfort and energy efficiency. Setting your AC within this range can help you stay cool while also reducing your energy consumption and utility bills.

However, it’s important to note that individual preferences may vary. Some people may prefer a slightly cooler or warmer temperature. Experiment with different settings to find what works best for you and your family.

Energy Efficiency and Cost Savings

Setting your AC to a higher temperature can significantly impact your energy consumption and save you money. According to the U.S. Department of Energy, for every degree you raise your thermostat above 78°F (25°C), you can save up to 3% on your cooling costs.

For example, if you typically set your AC to 72°F (22°C) and increase it to 78°F (25°C), you could potentially save around 18% on your cooling costs. This can add up to substantial savings over the course of a summer.

Additionally, using a programmable thermostat can further enhance energy efficiency. You can program your AC to automatically adjust the temperature when you’re away from home or asleep, reducing unnecessary cooling and saving even more energy.

Consider the Humidity

While temperature is crucial for comfort, humidity levels also play a significant role. High humidity can make the air feel warmer and more uncomfortable, even if the temperature is set at an optimal level.

Experts recommend keeping the humidity level in your home between 30% and 50%. This can be achieved by using a dehumidifier or setting your AC to the “auto” mode, which allows it to regulate both temperature and humidity.

Case Study: Singapore’s Approach

Singapore, a tropical country known for its hot and humid climate, has implemented a unique approach to AC settings. The government encourages residents and businesses to set their AC temperature to 25°C (77°F) or higher to conserve energy.

This initiative, known as the “Cooling Degree Initiative,” aims to reduce energy consumption and carbon emissions. By setting a higher temperature, Singaporeans have collectively saved millions of dollars in energy costs and contributed to a more sustainable environment.

Tips for Optimal AC Usage

Here are some additional tips to maximize the effectiveness and efficiency of your AC:

  • Keep doors and windows closed when the AC is running to prevent cool air from escaping.
  • Use ceiling fans or portable fans to circulate the cool air, allowing you to set the AC temperature slightly higher.
  • Regularly clean and maintain your AC unit to ensure optimal performance.
  • Consider using blinds or curtains to block out direct sunlight, reducing the need for excessive cooling.


When it comes to the best setting for AC in summer, it’s important to find a balance between comfort and energy efficiency. Setting your AC within the range of 72°F (22°C) to 78°F (25°C) is generally recommended, but individual preferences may vary. By raising the temperature and using a programmable thermostat, you can save on energy costs while staying cool. Don’t forget to consider humidity levels and implement additional strategies like using fans and blocking out sunlight. Ultimately, finding the best AC setting for you will depend on your personal comfort and energy-saving goals.

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