Ecobee Smart Thermostat Premium Review

What the Ecobee Smart Thermostat Premium Actually Is

This is Ecobee's top-tier smart thermostat, sitting at the head of a lineup that includes the cheaper Enhanced model. For roughly $200–$250 on Amazon, you get a sleek glass-faced unit with a sharp color touchscreen, plus the feature that defines the whole experience: a bundled remote SmartSensor that reads both temperature and occupancy in a second room.

It's a full Apple HomeKit, Amazon Alexa, Google Assistant, and Samsung SmartThings citizen, and it goes a step further than most rivals by building Alexa and Siri directly into the thermostat — so it can double as a voice assistant and even an intercom. There's also a built-in air quality sensor that tracks indoor VOCs, which is the kind of bonus you don't expect from a wall-mounted climate gadget.

How It Performs Day to Day

The standout is the SmartSensor. A normal thermostat heats or cools based on the temperature at its own location, which is why your bedroom can feel freezing while the thermostat insists everything is fine. The Premium averages readings across its sensors and prioritizes the rooms where it detects people, so the comfort actually follows you around the house.

Setup runs through a clear in-app walkthrough, and the C-wire requirement is handled by an included Power Extender Kit for homes that don't have one — a genuine relief, because wiring is where these projects usually go sideways. Day to day, the touchscreen is responsive, the scheduling is flexible without being fiddly, and features like Eco+ learn your habits and pre-condition the house using off-peak electricity rates where available.

The energy savings are real but not magic. Ecobee cites meaningful annual HVAC savings, and in practice the smart scheduling, occupancy sensing, and away detection add up over a year — but how much you save depends heavily on your old habits and local utility rates.

The Pros and Cons Worth Knowing

On the plus side: the included remote sensor genuinely improves comfort, the screen and build quality feel premium, integration with every major smart-home platform is excellent, and the built-in voice assistant and air quality monitor are nice extras you won't find on most competitors. The Power Extender Kit also widens the range of homes it'll work in.

The downsides are mostly about price and polish. It costs notably more than the Enhanced model, and not everyone needs the air quality sensor or onboard Alexa. The built-in voice assistant can occasionally be slow to respond, and a few users find the all-glass face a fingerprint magnet. If you only care about basic scheduling, you're paying for capabilities you'll never touch.

Who Should Buy It — and Who Should Skip It

Buy the Premium if you have uneven temperatures across rooms, already live in a HomeKit, Alexa, or Google household, and want the best version of Ecobee's hardware with room to grow by adding more sensors. It's also a smart pick if you value the air quality readout and want a thermostat that can stand in as a voice assistant.

Skip it if you want to spend the least possible money — the Ecobee Enhanced delivers most of the core smart features for less. And if your home stays evenly heated and you'll never use voice or air monitoring, you're better off saving the difference.

The Verdict

The Ecobee Smart Thermostat Premium is a confident, well-rounded smart thermostat that earns its spot at the top of the range — mostly thanks to the included room sensor and broad smart-home support. It's not the cheapest path to a connected home, but it's the one that actually fixes the 'one room is always wrong' problem. For comfort-focused households already invested in smart tech, it's an easy recommendation.

Frequently asked questions

Does the Ecobee Smart Thermostat Premium need a C-wire?

It works best with a C-wire, but Ecobee includes a Power Extender Kit in the box so you can install it in many homes that lack one. Check your existing wiring against Ecobee's compatibility checker before buying.

What's the difference between the Ecobee Premium and Enhanced?

The Premium adds a built-in air quality sensor, an onboard voice assistant (Alexa and Siri), a higher-end glass design, and an included remote SmartSensor. The Enhanced is cheaper and skips those extras while keeping the core smart-scheduling features.

Will it actually lower my energy bill?

It can, through occupancy-aware scheduling, away detection, and Eco+ optimization. Savings vary widely based on your previous habits and local utility rates, so treat the manufacturer's figures as a best case rather than a guarantee.