Installing Ecobee With Only 2 Wires

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Found these two wires, could it be for the humidifier? : r/ecobee

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Wiring ecobee with 2 wires in y terminal : r/ecobee

Found these two wires, could it be for the humidifier? : r/ecobeeWiring ecobee thermostat diagram pek trim plate downloading backplate conventional app power easy large Thermostat ecobee3.

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Found these two wires, could it be for the humidifier? : r/ecobee

Ecobee3 Lite Smart Thermostat Install and Review - HomeTechHacker

Ecobee Thermostat Wiring Diagram

would this wiring work with the ecobee3 lite : ecobee

Wiring ecobee with 2 wires in Y terminal : r/ecobee