How the Home Report accounts for changes in your energy use

If your energy use has changed from last month, you’ll find a few of the main reasons why in your Home Report. There are a number of factors that can influence your energy use and determine the difference between each month.

If you’ve only had your Google Nest thermostat for one month, or if your energy use hasn’t changed much, this section may not appear in your Home Report.

Why your energy use may have changed

	Weather As the weather changes, you naturally use more or less heating or cooling, even if you don’t adjust your thermostat. With the same schedule, a Nest thermostat might never turn on the heat in spring, but it might turn on 12 hours a day to keep you warm during winter.
	Schedule Changes to your schedule may cause your energy use to change compared to the previous month. If your energy use is higher or lower because of a change to your schedule you might find this reason listed in your Home Report. Note: Your schedule can change if you add or remove a setpoint, or if your Nest thermostat automatically learns a new setpoint using Auto-Schedule.
	Manual adjustments It’s considered a “manual adjustment” whenever you change the temperature using your thermostat or the Nest app. The Home Report compares the manual adjustments you made last month to the ones you made this month.
	Eco Temperatures If you change your thermostat to Eco Temperatures, it may cause your energy use to change from the previous month. Tip: Choosing energy efficient Eco Temperatures can help you save energy.
	Home & Away Your thermostat can automatically switch to Eco Temperatures to help save energy when no one’s home.
	Off If your Nest thermostat is off, it won’t heat or cool your home unless your  Safety Temperature are reached. If you’ve saved energy this month by turning your thermostat off, you’ll find this reason in your Home Report.
	Added a Nest thermostat If you add another Nest thermostat to your home, you’ll get twice the energy information. This extra energy information might make it look like your energy use has gone up. This icon will appear so you know that you haven’t necessarily used more energy, just that your thermostats notice more of it.
	Calendar days Every month doesn’t have the same number of days. Between January (31 days) and February (28 days), you can heat your home for the same number of hours each day, and you will still end up using less energy in February than January.