ecobee Smart Thermostat Premium Review: Would Buyers Buy It Again?
Disclosure: As an Amazon Associate I earn from qualifying purchases. If you buy through links on this page we may earn a commission at no extra cost to you. How this review was made: We did not test this thermostat ourselves. This verdict rests on the Tom's Guide review (about two weeks of testing) and a review aggregator summary, listed at the end. Long-term reliability evidence is thin. Our method.
Very capable, but some extras are gimmicky
Tom's Guide found it reliable over its testing and called it the smartest of the smart thermostats, with support for Alexa, Google Assistant, HomeKit, SmartThings and IFTTT. It includes a room sensor. The same review calls the air quality monitor of limited use and the speaker weak, and an aggregator summary lists reports of false poor air readings, temperature overshoot, Wi-Fi hiccups and mixed support. Great if you want broad ecosystem support, less compelling if you just want a simple thermostat.
Check current price on Amazon → Prices and availability change often, so we don't list them here.Buy it again if you…
- use Siri, Alexa or Google and want one thermostat for all
- have uneven rooms and want a remote sensor
- like a stylish display
Skip it if you…
- want the simplest, cheapest thermostat
- expect a reliable air quality readout
- need it to work fully without internet
The ecobee Smart Thermostat Premium has a 2.9-inch touchscreen, a zinc finish, a built-in speaker and microphone, an air quality monitor, and an included remote SmartSensor for temperature and occupancy. Installation needs a power (C) wire, and an adapter is included.
We combed the sources we could read and flag where evidence is thin.
What owners say, at a glance
Bars show our editorial summary of how consistently owners praise or complain about each area across all sources — not a lab measurement.
The key specs
| Display | 2.9 x 2.9 in, 540 x 540 |
|---|---|
| Wi-Fi | Dual-band 2.4/5 GHz |
| Platforms | Alexa, Google Assistant, HomeKit, SmartThings, IFTTT |
| Sensors | Included SmartSensor; built-in air quality and presence detection |
| Power | C-wire needed; adapter included |
What reviewers like
What reviewers criticize
How it holds up over time
Tom's Guide tested for roughly two weeks, which says little about years of use. We found no robust long-term data.
Buying tips
- Check your wiring for a C-wire before buying.
- Siri needs a HomePod Mini as a hub, per Tom's Guide.
- Disable unwanted Alexa features if you do not use them.
Pros and cons
What owners love
- Works with Alexa, Google, HomeKit and SmartThings
- Room sensor included
- Attractive display and finish
- Built-in Alexa speaker
- Power adapter included
What owners complain about
- Air quality monitor of limited use
- Weak speaker
- Extra sensors sold in pairs
- Reports of overshoot and app quirks
- Needs internet for full function
Other options buyers compare
The closest rival on our site is the Nest Thermostat.
| Model | Style | Consider it if… | |
|---|---|---|---|
| ecobee Smart Thermostat Premium (this review) | Feature-rich smart thermostat | You want broad platform support and a room sensor | See on Amazon |
| Google Nest Thermostat (2020) Read our review | Simple smart thermostat | You want a simpler, Google-centric option | See on Amazon |
| Basic programmable thermostat | Non-smart | You only need a simple schedule | — |
Want one thermostat that works with every assistant?
Check current options and bundles on Amazon.
Frequently asked questions
Does it include a remote sensor?
Yes, one SmartSensor is included.
Does it work with Siri?
Yes, but Tom's Guide notes it needs a HomePod Mini as a hub.
Do I need a C-wire?
Yes, for constant power; an adapter is included.
Is the air quality monitor reliable?
Reviewers call it of limited use and some owners report false poor readings.
Save this review for later
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Sources we analyzed
- Tom's Guide: ecobee Smart Thermostat Premium — specs, pros, cons, platform support
- ShopSavvy: ecobee Premium summary — owner complaint and praise themes
Figures reflect each source as of October 21, 2026 and may change. We summarize owner feedback in our own words and do not reproduce retailer reviews.