Smart thermostats

First setup check

Needs compatible 24 V HVAC and a C-wire or compatible adapter; not 120–240 V or millivolt systems. Follow the manual's power-isolation precautions and use a professional if unsure.

Not a line-voltage or millivolt thermostat; power and wiring compatibility must be checked.

• Requires compatible 24 V HVAC wiring and a C-wire or compatible C-wire power adapter; not for 120–240 V or millivolt systems.
• Follow the manual's power-isolation precautions and use a professional if you are not comfortable with electrical wiring. Alexa app and 2.4 GHz Wi-Fi setup are also required.

Check wiring and powering method; the catalog identity does not establish compatibility with a household system.

• Requires compatible 24 VAC HVAC wiring; check your system with ecobee's compatibility checker before purchase.
• Power uses a C-wire or a compatible Power Extender Kit installation. Check wiring and installation needs with the manufacturer or an HVAC professional.