If it is very cold, run the heating a little extra to prevent frozen pipes

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This can be used to heat an old house with pipes on an outside wall to lower the risk of pipes freezing.

If

Weather Underground icon
Current temperature drops below

This Trigger monitors your local temperature and fires whenever the temperature drops below the value you provide.

Then

ecobee icon
Set thermostat hold for X hours

This action will set the thermostat into a hold with the specified temperature for the specified number of hours.

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Discover more time saving integrations for Weather Underground and ecobee