To save energy in summer, program your thermostat to 78°F when home and raise it to 85°F when away, optimizing comfort and efficiency.
As temperatures rise, your thermostat settings can make or break your energy bills. Proper summer programming keeps your home comfortable while avoiding wasteful cooling. Follow these expert strategies to maximize efficiency without sacrificing comfort.
Optimal Summer Thermostat Settings
The U.S. Department of Energy recommends setting your thermostat to 78°F when awake and raising it higher when away. Each degree above 78°F saves 2-3% on cooling costs.
Ideal Temperature Ranges
- Home & awake: 78°F-80°F
- Sleeping: 82°F-85°F
- Away: 85°F-88°F
For homes with advanced thermostat controls, consider gradual temperature adjustments rather than sudden changes to prevent system strain.
Programming Strategies That Work
Smart Scheduling
Modern programmable thermostats allow multiple daily settings. Create a schedule that matches your routine:
| Time | Setting |
|---|---|
| 6:00 AM – 8:00 AM | 78°F (Morning routine) |
| 8:00 AM – 5:00 PM | 85°F (Away at work) |
| 5:00 PM – 10:00 PM | 78°F (Evening hours) |
| 10:00 PM – 6:00 AM | 82°F (Sleeping) |
Geofencing Technology
Smart thermostats with geofencing detect when you leave and return, automatically adjusting temperatures. This prevents cooling an empty home while ensuring comfort upon arrival.
Special Considerations
Heat Pump Systems
Traditional setback programming can reduce heat pump efficiency. Instead, maintain moderate temperatures consistently. Some specialized thermostats optimize heat pump performance with custom algorithms.
Radiant Cooling Systems
These slow-response systems benefit from early adjustments. Program temperature changes 2-3 hours before needed to account for thermal lag.
Maximizing Thermostat Efficiency
Proper Placement
Install thermostats on interior walls away from:
- Direct sunlight
- Drafts
- Heat-producing appliances
- Windows and exterior doors
System Maintenance
Combine smart programming with regular AC maintenance. Clean filters monthly and schedule professional tune-ups annually for peak performance.
Advanced Energy-Saving Techniques
Whole-Home Approach
Pair thermostat programming with other efficiency measures:
- Use ceiling fans to feel 4°F cooler (turn off when leaving rooms)
- Close blinds during peak sunlight hours
- Seal air leaks around windows and doors
According to energy.gov, proper thermostat use combined with these strategies can reduce cooling costs by up to 10% annually.
Time-of-Use Optimization
If on a time-of-use rate plan, program higher temperatures during peak pricing periods. Pre-cool your home before rate increases, then allow gradual warming during expensive hours.
Common Mistakes to Avoid
Overcooling
Setting the thermostat extremely low doesn’t cool faster – it just wastes energy. AC systems cool at a consistent rate regardless of setting.
Frequent Adjustments
Constantly changing settings forces your system to work harder. Stick to a consistent program for best efficiency.
For homes with supplemental cooling systems, coordinate their use with your main thermostat programming for optimal results.
