Ecobee thermostats solve the multi-room temperature problem better than any competitor. Instead of one thermostat reading on one wall, you place wireless sensors in the rooms you actually use. The thermostat averages or prioritizes those readings, so your bedroom isn't freezing while the hallway (where the thermostat is) reads 72°F.
The question is which Ecobee model to buy. Here's the honest breakdown.
Quick answer
- Best overall: Ecobee Smart Thermostat Premium — built-in Alexa, air quality monitor, SmartSensor included
- Best value: Ecobee Smart Thermostat Enhanced — same core features, no Alexa speaker or air quality monitor
- Must-have accessory: Ecobee SmartSensor — add to bedrooms, living room, and office for true multi-room comfort
Ecobee Premium vs Enhanced: What's Actually Different
| Feature | Premium (~$220) | Enhanced (~$170) |
|---|---|---|
| Room sensors | 1 SmartSensor included | No sensor included |
| Built-in Alexa speaker | Yes | No |
| Air quality monitor | Yes | No |
| Humidity sensor | Yes | Yes |
| Occupancy detection | Yes | Yes |
| Apple HomeKit | Yes | Yes |
| Google Home | Yes | Yes |
| Amazon Alexa | Yes (built-in + external) | Yes (external only) |
| Power Extender Kit | Included | Included |
| Touchscreen display | Yes | Yes |
The Premium has three extras: Alexa built in (acts as an Echo speaker), air quality monitoring, and one SmartSensor in the box. The Enhanced skips those but handles heating, cooling, scheduling, and room sensors identically.
If you already have Echo speakers, the built-in Alexa on the Premium is redundant. The Enhanced saves you $50 and does the same job for temperature management. Buy SmartSensors separately ($40 for a 2-pack).
If you care about air quality, only the Premium monitors VOCs and CO2 equivalent levels. This matters for homes with gas appliances or poor ventilation.
SmartSensors: The Real Value
Ecobee's SmartSensors measure temperature and occupancy in individual rooms. Place one in each bedroom and the living room. The thermostat uses "Follow Me" mode to prioritize heating/cooling in whichever room is occupied.
Without sensors, Ecobee is just a fancy single-point thermostat — no better than Nest or Honeywell for multi-room homes. With 3-4 sensors, it transforms how your HVAC manages comfort.
Sensors connect via Bluetooth to the thermostat (not WiFi). Battery life is approximately 5 years on a CR2032 coin cell. Place them away from windows, air vents, and direct sunlight for accurate readings.
Check SmartSensor prices on Amazon.
C-Wire Solution: No Electrician Needed
Both the Premium and Enhanced include a Power Extender Kit (PEK) in the box. If your home doesn't have a C-wire (common wire) at the thermostat, the PEK installs at your furnace control board to provide dedicated power — no new wire running through walls, no electrician visit.
Installation takes about 30 minutes. Ecobee's app walks you through the process step by step with wiring diagrams specific to your system.
Heat Pump Compatibility
Ecobee handles heat pump auxiliary heat switching better than most competitors. It monitors outdoor temperature and system performance to decide when to activate emergency/auxiliary heat, preventing the expensive electric resistance heating from running unnecessarily.
If you have a heat pump system, configure the aux heat lockout temperature in Installation Settings. This prevents aux heat from activating above a certain outdoor temperature where the heat pump alone can handle the load.
For Ecobee troubleshooting, see our Ecobee not reaching set temperature guide and Ecobee calibration issues guide.
FAQ
Does Ecobee work with Apple HomeKit? Yes. All current Ecobee models (Premium and Enhanced) support Apple HomeKit natively. You can control temperature, view room sensor readings, and create automations through the Apple Home app.
How many SmartSensors can I add? Up to 32 SmartSensors per Ecobee thermostat.
Does Ecobee support 5GHz WiFi? Only the Premium model supports dual-band (2.4GHz and 5GHz) WiFi. The Enhanced is 2.4GHz only.
Is there a monthly subscription? No. Ecobee has no mandatory subscription for any features. Everything — scheduling, room sensors, energy reports, voice control — is included with the hardware purchase.