In-depth review
Ecobee Smart Thermostat Premium Review (2027)
In-depth review of the Ecobee Smart Thermostat Premium: SmartSensor comfort, air quality monitoring, and eco+ savings.
Our verdict
The Ecobee Premium is the most complete smart thermostat you can buy. The included SmartSensor solves the number one comfort complaint, uneven rooms, while air quality monitoring and built-in voice assistants add genuine daily value. eco+ quietly optimizes for your utility rate plan. It is not the prettiest thermostat, but it is the smartest total package.
What we like
- SmartSensor included in the box fixes room-to-room temperature swings
- Built-in air quality monitor tracks VOCs, CO2 estimates, and humidity
- Alexa and Siri built in for voice control without a separate speaker
- eco+ optimizes for time-of-use rates and utility demand response
What to watch out for
- Interface is functional rather than beautiful
- Premium price, though the included sensor offsets it
- Some advanced features need the Ecobee app rather than the wall unit
What owners report: Ecobee Smart Thermostat Premium
Synthesized from recurring themes in long-term owner feedback.
Most praised
- An included room sensor immediately improves a bedroom that the hallway thermostat ignored
- Built in voice control and air quality awareness make it a broader home hub on the wall
- Optimisation for time based electricity pricing helps households on variable tariffs
Common complaints
- Some detailed controls live in the app rather than on the wall display
- Its interface values function over the polished look some owners want
- Premium cost remains, even allowing for the sensor included in the box
Who it is for
Multi-story homes, allergy and air-quality-conscious households, and anyone who wants sensors without buying accessories.
SmartSensor comfort
The thermostat measures the hallway; you live in the bedroom. The included SmartSensor reports temperature and occupancy from where it matters, and the Ecobee averages occupied rooms or follows the occupied ones depending on the mode. Night mode following the bedroom sensor alone transforms sleep comfort in two-story homes where heat rises and the upstairs bakes. Additional sensors pair easily if one room is not enough.
Air quality and voice
The built-in air quality monitor tracks VOCs, humidity, and estimated CO2, with alerts when levels drift and guidance on ventilation. It is the only thermostat here that tells you to open a window with data behind the suggestion. Alexa and Siri built into the unit mean the hallway has a voice assistant without another device, and it doubles as a smart speaker for music and timers.
eco+ and the rate game
eco+ is Ecobee quiet superpower: it pre-cools or pre-heats before peak rate periods and coasts through them, shifting load off expensive hours automatically. With time-of-use rates spreading across utilities, this feature alone can beat the savings of dumber thermostats. Pair it with utility demand-response programs for additional rebates.
Key specifications
- Room sensors
- 1x SmartSensor included
- Air quality
- VOC, humidity, CO2 estimate
- Voice
- Alexa and Siri built in
- Compatibility
- Most 24V HVAC; C-wire required
- Display
- 3.5-inch glass touchscreen
Also consider
Google Nest Learning Thermostat (4th Gen)
The learning pioneer, refined with radar and polish.
Why consider it: Superior learning and design for buyers who prefer automation over sensors.
- Learning: Auto-schedule from manual adjustments
- Presence sensing: Soli radar + phone location
Honeywell Home T9 Smart Thermostat
Room sensors done right for tricky floor plans.
Why consider it: More sensors supported (up to 20) for very large or complex floor plans.
- Room sensors: 1x sensor included; supports up to 20
- Geofencing: Yes, multi-user
Research-based assessment. TrueGear has not hands-on tested this product; this evaluation synthesizes manufacturer specifications, retailer documentation, and published expert reviews.
Questions, answered
How accurate is the air quality monitor?
It is a good trend instrument rather than a lab device: reliable for spotting VOC spikes from cooking or cleaning and humidity drift, but not a replacement for a dedicated radon or particulate monitor.
Does it need a C-wire?
Yes, Ecobee requires a C-wire, but the Power Extender Kit covers homes without one by repurposing existing wires at the furnace. Verify your wire bundle has enough conductors first.
Can it control humidifiers and ventilators?
Yes, the Ecobee supports accessory wiring for humidifiers, dehumidifiers, and ventilators, with humidity targets in the app. This is a genuine advantage over simpler thermostats in dry or humid climates.