How to read your Nest thermostat’s Energy History

Your Google Nest thermostat’s Energy History shows you how often and for how long your system has run, so that you can make smart choices about your schedule and temperature preferences.

Your thermostat’s Energy History is a detailed summary that covers the last 10 days. You can view it on your thermostat or with the Nest app on a phone, tablet, or computer.

Note: To see Energy History, your thermostat must be connected to Wi-Fi and added to your account in the Nest app.

On your thermostat 

  • You can find your Energy History by selecting History Thermostat history iconin the Nest thermostat’s Quick View menu.
  • If you’re using a Nest Thermostat E, your Energy History will be in the Settings Nest settings icon and then History.

Your Energy History at a glance

When you select History, you’ll see a simple graphic that shows how long your heating or cooling ran for the day. 

  • An orange bar represents heating and a blue one represents cooling. 
  • If your thermostat was in Heat•Cool mode, or you recently switched between modes, you’ll see both orange and blue bars.
  • Turn the thermostat’s ring to see the Energy History for other days. You can look as far back as 10 days ago.

Note: Since your thermostat needs time to learn about how you use energy, it will usually take at least a day after installation for Energy History information to appear.

Daily Energy History details

Press the thermostat’s ring to see more details about a particular day. 

Turn the ring to scroll down and to see more information, like if your energy use was significantly higher or lower than the average over the last week. If it was, the thermostat will also show you the main contributor: your adjustments, Eco Temperatures, Home/Away Assist, or the weather. 

Press the thermostat ring to go back to the main Energy History screen when you’re done, or hold down the ring to exit and return to the thermostat temperature screen.

In the Nest app 

  1. Open the Nest app and tap your Nest thermostat on the home screen.
  2. Tap the History Thermostat history icon icon.
  3. Here, you’ll see a 10 day summary. Tap on any day to see more details about your heating and cooling system’s energy use.

Energy History icons 

Here are the icons you’ll see in your Energy History, and what each one means.

energy history orange bar icon

energy history blue bar

The bars show when your system was heating or cooling.

  • Orange for heating
  • Blue for cooling

The number next to the bar is the total time your system was on during the day.

leaf icon

On the left of the screen, you’ll see the Leaf icon for the days when you saved energy and earned a Nest Leaf.

energy history set icon

On the right, you’ll see the main reason why your energy usage went up or down (compared to the average of the 7 previous days). This can be your temperature adjustments, the weather, or Home/Away Assist.

How to read the expanded view 

For more information about your energy usage on a particular day, tap that day for an expanded view.

You can tap or click on multiple days to compare Energy History details and see how your temperature choices influence your heating or cooling times.

Tip: If you’re viewing Energy History on a phone, try rotating your screen to landscape view.

energy history expanded image

energy history cool energy history heat

At the top are your target temperatures. These represent the temperatures in your schedule as well as any manual adjustments you made on your thermostat or with the Nest app.

Away icon image

If you set your thermostat to Eco Temperatures, or if Home/Away Assist has kicked in, you will see this icon at the beginning of the time your thermostat went into Eco Temperatures.

Nest app energy history more details

Tap on any icon to see more information.

If you’re on a computer, just hover your mouse over any icon to see more information.

Nest app energy history heat

Each orange bar represents the time that your heating was on, while blue bars show when your cooling was on.

Note: If you see two shades of orange or blue, it means you have a two-stage system. The lighter shade is the 1st stage, and the darker shade is the 2nd stage. If you see three shades, it means you have a three-stage system, with the darkest shade showing the 3rd stage.

energy history timeline start

At the beginning of each day, you can see what the target temperature in your home was at midnight the previous day.

Download button

When your Nest thermostat is updated with new software, an icon will appear in Energy History on the day that it was updated. Tap or click the icon to see the time of the update. 

Note: Requires the Nest app 4.1 or later.

Off button

If you turned your thermostat off, this icon will appear.

How Energy History can help you save energy 

Here are a couple of examples of how to use Energy History to help you save energy when you’re using heating in cool weather.

Lower your night temperature:

Try turning down the temperature by a couple of degrees during the night since you’ll be asleep. You probably won’t notice a difference.

Nest app energy history away example

On this day, your thermostat was set at 68°F from midnight to 7am. Each orange bar indicates when the heat came on.

Nest app energy history away example

Now, look at the next day, when your thermostat was set at 64°F for the same time period. The heat came on less frequently, helping to save energy.


Changing your Eco Temperatures

Learn how to set your thermostat’s Eco Temperatures

Note: Energy efficient Eco Temperatures can help save you energy when you set them lower (for heating) and higher (for cooling) than your comfort temperatures. If you set your heating Eco Temperature too high or your cooling Eco Temperature too low, so that they won’t make an impact on your energy savings, you may see an alert in your Home Report.

Nest app energy history away example

On this day Home/Away Assist kicked in shortly after 8am. The Eco Temperature is set to 60°F.

Nest app energy history away example

The next day, after changing the Eco Temperature to 53°F, notice how the heat didn’t come on at all during the same period.

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