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Emerson Sensi ST55U Smart Wi-FI Thermostat White

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Sold as 1 Each. Designed to work with the wires you already have, Sensi thermostat does not require a common wire (c-wire) for most installations, so it is compatible with the HVAC equipment in many homes in U.S. Canada. A c-wire is required for heat-only, cool-only and heat pump (without aux) systems, and for use with Apple HomeKit. The intuitive app walks you through each step of installation with custom configured instructions, removing all the frustration and guesswork from the installation process.