The Smart Home Blog
The latest news and updates on home technology
The Nest Thermostat.
Energy saving features
The Nest Learning Thermostat offers several features that help users save energy: Auto Schedule, Auto Away, Time to Temperature, True Radiant, the Nest Leaf, Energy History and Report, and remote control using the Nest app.
The Nest Thermostat automatically learns customers’ schedules and preferences based on their selected temperatures. Through the automatic learning algorithm, the thermostat creates a setback schedule that uses a lower temperature setting when people are away or asleep, providing energy savings without compromising comfort.
Auto Away and Away mode
Auto Away detects when users leave the house, whether for several hours or several days. Sensor data is interpreted by algorithms to provide a confidence determination of the home's occupancy. When the Nest Thermostat is confident that nobody is home, AutoAway overrides the existing schedule to save energy. During Away periods, the heating setpoint (target temperature) is reduced to a user selected value where efficiency gains can be realized. Away mode can also be set manually on the thermostat or remotely by using the Nest app. Even if Auto Away is deactivated, customers can use remote control to save energy while out of the house.
The Time to Temperature feature calculates and displays in realtime an estimated time to reach the set temperature. People often set a very high temperature hoping to hurry their heating, but this behavior is inefficient because increasing the set temperature also increases heating time. By showing the estimated time it will take to reach their desired temperature, Time to Temperature reassures the customer that their heating is on and can discourage wasteful behavior.
True Radiant uses Time to Temperature to decide when heating should begin, in order to reach desired temperatures according to the Nest Thermostat’s schedule. The learning algorithm accurately determines when to turn on heating to reach the right temperature at the right time, based on information about how quickly the home heats and cools. This can reduce unnecessary overheating and potentially save additional energy.
The Nest Thermostat encourages users to select energy efficient temperatures by displaying a green Nest Leaf icon whenever they set an efficient temperature. Efficient temperatures are specific to each household, based on the home, the habits of the family and the resulting temperature schedule that the Nest Thermostat has learned.
Energy History and Report
Energy History displays a comparison of the last ten days of heating usage to a running ten day average, letting users know how much they used and why. By revealing the factors affecting their energy consumption, Energy History helps users understand how they can save even more energy. The Nest Energy Report is a monthly email sent to each customer with an Internet connected Nest Thermostat that summarizes the previous month’s heating usage, providing tips on saving energy. It also compares the customer’s heating usage to their historical heating usage, as well as to other customers’ energy use. In this way, all Nest customers are encouraged to use the thermostat features to be more efficient.