“Are batteries required for use, although the thermostat is wired?”
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Yes. The wires are for the HVAC. The batteries power the Nest.
Sorry, there was a problem. Please try again later.Yes, 2 AAAs.
Sorry, there was a problem. Please try again later.The Nest Thermostat is designed to work if your home doesn’t have a common (“C”) wire. In some cases, particularly if you have a heating-only or cooling-only system or use a zone controller, a C wire or other power-supply accessory may be necessary. See g.co/nest/cwire for details. Nest Thermostat uses two high-quality 1.5 V AAA Alkaline batteries. For systems that are not using a C wire, the average battery life is three to six months. However, depending on the Wi-Fi activity on the thermostat, it may be possible to extend or reduce the battery life. Typically, smart thermostats don’t require a common (C) wire, but every system is different. Without a common wire, your Nest thermostat will charge itself through power sharing using your existing heating and cooling wires. When there’s a C wire, it becomes the thermostat’s go-to for power backup when power sharing doesn’t work. This can also conserve battery life since the batteries will likely only be in use when there’s a power loss to the thermostat. We also recommend using our Compatibility Checker first to see if your system is compatible with the Nest Thermostat. Here's the link: https://store.google.com/us/widget/compatibility/thermostat
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