Ecobee Smart Thermostat Premium review

The Premium ranks first because it does the most to cut bills without asking you to manage it. Radar sensing in the thermostat and the included SmartSensor tell it when rooms are occupied, so it can reduce heating or cooling when the home is empty and focus on the rooms in use when it is not. Ecobee says it can save up to 26% on heating and cooling costs, or up to $284 a year. The 4 inch touchscreen sits in a metal body, air quality monitoring sends alerts and filter reminders, and Siri and Alexa are built in. It handles 2H/2C conventional systems, heat pumps with 2 stages of auxiliary heat, and one humidifier, dehumidifier or ventilator accessory. The Power Extender Kit in the box covers most homes without a C wire. The thermostat can also act as a home security hub, but that needs a paid ecobee plan. We compared documented features and published prices.

Who it is for

Homeowners who want the most automatic savings and comfort in the rooms they actually use.

Price

$259.99 on the ecobee US store when checked, with SmartSensor and Power Extender Kit included.

Home / Thermostats / Smart Thermostat Premium / $259.99 Smart Thermostat Premium
Quoted from the vendor pricing page on November 9, 2026.

Key features

• Radar occupancy and proximity sensing built into the thermostat
• SmartSensor included to manage hot and cold spots in occupied rooms
• Built-in air quality monitoring with alerts and air filter reminders
• Siri and Alexa built in, plus Apple HomeKit and SmartThings support
• Power Extender Kit included for homes without a C wire

Strengths and weaknesses

• Strength: Ecobee rates savings at up to 26% on heating and cooling
• Strength: Sensor and C-wire workaround both come in the box
• Strength: Dual-band Wi-Fi and a 3-year limited warranty
• Weakness: Highest price of the ecobee range
• Weakness: Security hub features need a paid ecobee Smart Security plan
• Weakness: Google Assistant is not listed among supported platforms

Key facts

• Savings claim: Up to 26%
• Room sensor: 1 SmartSensor included
• C wire: Power Extender Kit included
• Warranty: 3 years

Where it ranks

Ecobee Smart Thermostat Premium is No. 2 in our Best Smart Thermostats verdict.