Recently the Environmental Protection Agency’s Energy Star Program has recommended setting your AC thermostat at 78º F for peak comfort and energy efficiency while your at home. Furthermore, they recommend 4º warmer when you are sleeping and 7º warmer when you are away from home. These do not seem like real numbers and they are not. Just recommendations. A survey by Consumer Reports shows that most people with central AC systems keeps the thermostat at 72º and even cooler when they sleep.
The Goldilocks Zone: What Science Suggests
Science suggests that the optimal temperature for sleep is between 60 and 67 degrees Fahrenheit (15.6 to 19.4 degrees Celsius). This range helps facilitate stable REM sleep and allows your body to naturally cool down, which is essential for falling asleep and staying asleep. However, the ideal temperature can vary slightly from person to person, so it’s important to find what feels most comfortable for you.
Summertime
- Most experts recommend setting your thermostat between 70°F and 78°F (21°C and 26°C) while you are home during the summer.
- This range balances comfort with energy efficiency.
- You can adjust the temperature slightly higher or lower depending on your personal preference and activity level. For example, if you are more active, you may prefer a slightly lower temperature.
- Consider increasing the temperature slightly when you are not home to save energy.
Wintertime
- The recommended temperature range for winter is typically between 68°F and 72°F (20°C and 22°C) while you are home.
- Again, this range can be adjusted based on your personal preference and activity level.
- Lowering the temperature when you are asleep or away from home can help save energy.
Additional Considerations
- Humidity: Maintaining proper humidity levels (generally between 30% and 50%) is important for comfort and health. High humidity can make it feel warmer, while low humidity can lead to dry skin and respiratory issues.
- Age and Health: Older adults and individuals with certain health conditions may prefer slightly warmer temperatures.
- Clothing: Dress appropriately for the temperature to help you feel more comfortable.
Remember, these are just guidelines. The optimal temperature for your home is ultimately the one that makes you feel most comfortable and allows you to be productive and relaxed.
Tips for Optimizing Your AC Settings
To achieve the perfect balance between comfort and energy efficiency, consider these practical tips:
- Programmable Thermostat: Invest in a programmable thermostat that allows you to set different temperatures for different times of the day. This can help you save energy by automatically adjusting the temperature when you’re asleep or away from home.
- Regular Maintenance: Ensure your AC unit is well-maintained and running efficiently. Clean or replace air filters regularly, and schedule professional maintenance checks to keep your system in top shape.
- Ceiling Fans: Use ceiling fans to circulate air and create a cooling effect. This can allow you to raise your AC setting by a few degrees without sacrificing comfort.
- Window Treatments: Use curtains, blinds, or shades to block out sunlight and reduce heat gain in your home.
- Smart Thermostats: Consider a smart thermostat that learns your preferences and adjusts the temperature accordingly. These thermostats can also be controlled remotely, allowing you to adjust the temperature from your smartphone.
- Zone Cooling: If you have a larger home, consider zone cooling, which allows you to set different temperatures for different areas of your house.