69-2725ES-01 - RTH2510/RTH2410 Series - Honeywell Store
https://www.honeywellstore.com/store/images/pdf/rth2510b1000-u-7-day-programmable-thermostat.pdf
WEBOperating Manual 69-2725ES—01 16 About your new thermostat Early Start: This feature allows the heating or cooling to turn on before the program start time, so the temperature is reached at the time you set. For example: Set the Wake time to 6 am, and the temperature to 70°. The heat will come on before 6 am, so the temperature is
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