How the Home Report accounts for changes in your energy use

If your energy use has changed since the previous month, you’ll see a few of the main reasons why in your Home Report. Nest looks at a number of factors that can influence your energy use, and uses them to determine the difference between each month.

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

Reasons why your energy use might have changed

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As the weather changes, you naturally use more or less heating, even if
you don’t adjust your thermostat.

With the same schedule, a Nest thermostat might never turn the heating
on in spring, but it might turn on for 12 hours a day to keep you warm
during winter.

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Changes to your schedule may cause your energy use to change
compared to the previous month. If your energy usage is higher or lower
because of a change to your schedule, you might see this reason listed in
your Home Report.

Note: Your schedule may change if you add or remove a setpoint, or if
your Nest thermostat automatically learns a new setpoint using Auto-

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Manual adjustments

Whenever you change the temperature using your thermostat or the
Nest app, it’s considered a 'manual adjustment'. In the Home Report, we
compare the manual adjustments that you made the previous month to
those that you've made this month.

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Eco Temperature

If you change your thermostat to Eco Temperature, it may cause your
energy use to change from the previous month.

Tip: Choosing an energy-efficient Eco Temperature can help you save

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Home/Away Assist

Home/Away Assist can automatically use your Eco Temperature when no
one’s at home to help save energy.

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If your Nest thermostat is Off, it won’t heat your home unless your Safety
 is reached. If you’ve saved energy this month by turning
your thermostat off, you’ll see this reason in your Home Report.

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Added a Nest thermostat

If you add another Nest thermostat to your home, you’ll see twice the
energy information. This extra energy information might make it look like
your energy use has gone up. We’ll show you this icon so you know
that you haven’t necessarily used more energy; we can simply see more
of it.

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Calendar days

Each 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, but you will still end up using less energy in
February than January.

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