ecobee Smart Thermostat Premium Review
The included remote sensor is the real feature. The voice assistant and air quality monitoring are extras you may or may not use.
Thermostats are the smart home category with the strongest financial argument and the most prerequisites. Get the compatibility wrong and the best-reviewed thermostat in the world will not work in your house.
The Premium's distinguishing feature is not the touchscreen or the built-in voice assistant. It is the included remote sensor, which addresses the actual problem most houses have: one room is always the wrong temperature.
What it is
A premium smart thermostat with a glass-front touchscreen, an included remote SmartSensor, a built-in voice assistant, air quality monitoring, and a Zigbee radio for communicating with ecobee accessories.
It supports Apple Home natively, along with Alexa, Google Home and SmartThings. The remote sensor reports temperature and occupancy from wherever you place it, letting the thermostat average across rooms or prioritize the room you are in.
What works well
- The included remote sensor is the standout feature. If your bedroom is three degrees colder than the hallway where the thermostat lives, this is the fix. It improves comfort in a way that is immediately noticeable.
- Native Apple Home support. Still uncommon in this category. If your household runs on Apple Home, this integrates properly rather than through a third-party bridge.
- Zigbee radio built in. That means additional ecobee sensors connect directly without a separate hub, and the thermostat can serve as a small hub for compatible accessories.
- Air quality monitoring. Reports on indoor air quality — useful if you have allergies or a new build, easy to ignore if you do not.
- Schedules and geofencing work reliably. The core job, done well, with a clean interface on the device and in the app.
Trade-offs and limitations
- C wire almost always required. Most installations need a common wire for steady power. ecobee includes a Power Extender Kit for systems without one, but it adds a step at the air handler and is not a five-minute job.
- HVAC compatibility must be checked first. Heat pumps, dual-fuel systems and multi-stage equipment all have specific requirements. Use the manufacturer's compatibility checker and photograph your existing wiring before ordering.
- Line-voltage systems are not supported. Electric baseboard and in-floor heating need a completely different product. Installing the wrong type is a safety issue, not just an inconvenience.
- Savings claims need context. No thermostat can compensate for poor insulation or an unbalanced duct system. Expect the value to come from a consistent setback schedule and from not conditioning an empty house.
- Matter support should be verified. ecobee has been adding Matter across its line. Check the current status for your specific model rather than assuming.
- One sensor is included, not several. If you want room-by-room averaging across three bedrooms, budget for extra sensors.
Who it is for
Households where room temperatures vary noticeably, and anyone who wants a thermostat that works natively with Apple Home. It is also a good choice if you want a voice assistant in a hallway position where people actually walk past it.
It is a poor fit if your system is line-voltage, if you are not comfortable confirming HVAC compatibility, or if you simply want the cheapest thermostat that keeps a schedule.
Bottom line
The Premium earns its price through the remote sensor and the native Apple Home support, not through the touchscreen or the air quality readout. If you have an uneven house, that sensor is worth more than the feature list suggests.
Do the compatibility check first. That single step determines whether this is a good purchase or a return.
Specifications at a glance
| Attribute | Detail |
|---|---|
| Included accessory | One remote SmartSensor |
| Voice assistant | Built in |
| Radio | Zigbee for ecobee accessories |
| Ecosystems | Apple Home, Alexa, Google Home, SmartThings |
| Wiring | C wire required in most installations; Power Extender Kit included |
| Not supported | Line-voltage systems such as electric baseboard |
| Extras | Air quality monitoring, glass touchscreen |
| Best fit | Uneven room temperatures, Apple Home households |
Frequently asked questions
Do I need a C wire for the ecobee Smart Thermostat Premium?
In most installations yes. ecobee includes a Power Extender Kit that supplies constant power on systems without a C wire, but it requires access to your HVAC equipment and a few extra wiring steps.
Will it work with a heat pump?
Many heat pump and dual-fuel configurations are supported, but the requirements are specific. Use ecobee's compatibility checker and photograph your existing thermostat wiring before ordering, or ask an HVAC technician.
Does the remote sensor really help?
Yes, if your home has uneven temperatures. The sensor lets the thermostat respond to the room you occupy instead of the hallway where the unit is mounted, which is the most common source of comfort complaints in a house with a single thermostat.
How much can a smart thermostat save?
The saving comes from consistent setback schedules and not heating or cooling an empty house. The actual amount depends on your climate, utility rates, insulation and habits. Be skeptical of any specific percentage quoted without context — and check whether your utility offers a rebate.