Z-Wave Plus 24V HVAC thermostat that runs up to 3-stage heat pump or 2-stage conventional systems with On/Auto/Circulate fan modes and an indoor humidity readout. Home Assistant manages mode, setpoints, and fan fully locally through Z-Wave JS, with no cloud account involved.
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Runs on 3x AA batteries or a 24VAC C-wire and joins with S2 security. Disable the built-in schedule and Adaptive Intelligent Recovery so Home Assistant owns the setpoints. The TH6320ZW2003 is giving way to the drop-in TH6320ZW2007, which adds SmartStart; the Wi-Fi T-series siblings require Resideo's cloud, so we feature the Z-Wave model only.
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