Using a smart thermostat is one of the best ways to cut your monthly energy costs, and this Amazon is offering the NestThermostat for just $100 right now, down from its regular $130 MSRP.
The fourth-generation Nest Learning Thermostat ... screens to complete the thermostat installation. It then prompted me to add the sensor, so I pulled out the battery tab, scanned the QR code ...
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