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 an orange bar that represents how long your heating was on for during the day. 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 see more information. For instance, you can see if your energy use was significantly higher or lower than average over the last week. If it was, the thermostat will also show you the main contributor: your adjustments, Home/Away Assist or the weather. 

Press the thermostat ring to go back to the main Energy History screen when you've finished, or hold down the ring to exit and return to the thermostat temperature screen.

Domestic hot water won't be shown in your Energy History

If you have a 3rd-generation Nest Learning Thermostat, it can also control your domestic hot water. However, you won't see the times when your domestic hot water was on and using energy in your Energy History.

The Nest thermostat can still help you to save though – you can create a personalised schedule to control exactly when your hot water is on, and Home/Away Assist will help by turning off your hot water when you're away for extended periods, such as when you're on holiday.

How OpenTherm can affect your Energy History

If you have a 3rd-generation Nest Learning Thermostat or the Nest Thermostat E installed with an OpenTherm-compatible boiler, when True Radiant is enabled, you might see long heating times in your Energy History and Home Report. As your Nest thermostat will tell your OpenTherm-compatible boiler how to modulate when True Radiant is enabled, your heating can run for long periods of time – but the heating water will be at a lower temperature to control your home's temperature more precisely. This type of heating control can be a more efficient way of keeping you comfortable.

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 that you’ll see in your Energy History, and what each one means.

energy history orange bar icon

 

An orange bar shows that the system was heating. The number next to the bar is the total time for which 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 seven previous days). This could be because of 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 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.

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

Away icon image

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

Nest app energy history more details

Tap 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.

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.

Click or tap several different days to compare the detailed Energy History for each day. This will show how your temperature choices influence your heating usage.

How Energy History can help you to 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-time temperature:

Try turning the temperature down by a couple of degrees during the night. As you'll be asleep, you probably won't notice any difference.

On this particular day, your thermostat was set at 20°C from midnight to 7 a.m. Each orange bar indicates when the heating came on.

Now look at the next day, when your thermostat was set at 18°C for the same time period. The heating came on less frequently, helping you save energy.

Changing your Eco Temperatures

An energy-efficient Eco Temperature can help to save you energy when you set it lower than your comfort temperature. If you set your heating Eco Temperature too high, so that it won’t have an impact on your energy savings, you may see an alert in your Home Report.

Nest app energy history away example

On this particular day, Home/Away Assist kicked in shortly after 8 a.m. The Eco Temperature is set to 16°C.

Nest app energy history away example

The next day, after changing the Eco Temperature to 12°C, notice how the heating didn’t come on at all during the same period.

Domestic hot water won't be shown in your Energy History

If you have a 3rd-generation Nest Learning Thermostat, it can also control your domestic hot water. However, you won't see the times when your domestic hot water was on and using energy in your Energy History. The Nest thermostat can still help you to save though – you can create a personalised schedule to control exactly when your hot water is on, and Home/Away Assist will help by turning off your hot water when you're away for extended periods, such as when you're on holiday.

How OpenTherm can affect your Energy History

If you have a 3rd-generation  Nest Learning Thermostat or the Nest Thermostat E installed with an OpenTherm-compatible boiler, when True Radiant is enabled, you might see long heating times in your Energy History and Home Report. As your Nest thermostat will tell your OpenTherm-compatible boiler how to modulate when True Radiant is enabled, your heating can run for long periods of time – but the heating water will be at a lower temperature to control your home’s temperature more precisely. This type of heating control can be a more efficient way of keeping you comfortable.

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