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Web Description Please Read This Quick Installation Guide For Programmable Thermostat (Rth221B1000, Rth221B1047, Rth221B1021, Rth221B1039) Carefully.
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Rth221B Thermostat Pdf Manual Download.
If the thermostat is following the programmed schedule, it will use the temperature settings. Web description automatic regulation of the room temperature and energy savings are the main tasks of the honeywell rth221b. Web learn how to install and operate the honeywell rth221 and rth2300 series programmable thermostats with this owner's manual.