Thermostat Setting Guide
Recommended thermostat settings for comfort and lower energy bills, in winter and summer, while you are home, asleep or away.
Recommended thermostat settings
| Situation | Winter (heating) | Summer (cooling) |
|---|---|---|
| Home and awake | 68 °F (20 °C) | 78 °F (26 °C) |
| Asleep | 60–65 °F (16–18 °C) | 78–82 °F (26–28 °C) |
| Away (work, short trip) | 58–62 °F (14–17 °C) | 82–85 °F (28–29 °C) |
| Vacation (long absence) | 50–55 °F (10–13 °C) | 85–88 °F (29–31 °C) |
| Homes with infants or elderly | 68–72 °F (20–22 °C) | 75–78 °F (24–26 °C) |
Notes
The US Department of Energy suggests about 68 °F in winter while awake and 78 °F in summer when home, setting back 7–10 °F for 8 hours a day to save up to 10% a year (see the thermostat savings calculator). Heat pumps may need smaller setbacks to avoid expensive backup heat. Keep winter settings above 55 °F to protect pipes. Indoor humidity of 30–50% makes any setting feel more comfortable.
Frequently asked questions
What is the best thermostat setting in winter?
About 68 °F (20 °C) when home and lower when asleep or away.
What should I set my AC to in summer?
About 78 °F (26 °C) when home.
Does turning the thermostat down save money?
Yes — roughly 1% per degree for 8 hours of setback.
What temperature prevents frozen pipes?
Keep the heat at 55 °F (13 °C) or higher.