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The smarter wi-fi thermostat with room sensors. For homes with more than one room.


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Sensor Technology

Deliver comfort to the rooms that matter most.

Most thermostats read the temperature in one place (usually the hallway) which can make other rooms uncomfortable. ecobee3 uses room sensors to deliver the preferred temperature to the rooms that matter. Simple.

Sensor Technology Sensor beams
Sensor Technology
Sensor Technology Sensor beams
Smarter Comfort

A complete comfort system for your home.

Smarter Control

Effortless control at your fingertips.

Ecobee Press


Smart means reducing heating and cooling costs by up to 23%* a year.

ENERGY STAR® certified, so you know it's good for you and the planet.

* Learn more

Smarter Home

Supports your connected home to make life simpler.

Smarter Savings

Engineered for energy savings. Designed for you.

Built to last

ecobee is hardwired so you'll never be left out in the cold.

Being hardwired means your thermostat isn’t relying on a battery or your HVAC equipment to charge itself (aka “power-stealing”). A little bit extra, for no extra.

product wiring
Easy Setup

Getting started is simple.

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Will it work with my home?

Yes, we are compatible with most residential heating and cooling systems.

Check Compatibility

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Can I install it myself?

You bet. Use our step-by-step guide or call our friendly support team.

Watch Installation Videos

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Can I get it professionally installed?

Yes, we can help connect you with certified pro installers in your area.

Find a Pro

Smart, really smart

You have better things to do than teach your thermostat.

ecobee thermostats use local weather to understand your home's unique energy profile and transforms thousands of data points into cost savings.


Ordinary thermostats read the temperature in only one room, but are supposed to deliver comfort in all rooms. ecobee3 remote sensors deliver the right temperature in the rooms that matter most.

If your ecobee3 senses that you are home during your scheduled Away period, or away during your scheduled Home period, it will automatically override your schedule to maximize comfort and savings.

Control your comfort by averaging the temperature of the selected sensors that detect motion or all of the selected sensors in your home, regardless of motion.

Technical Specs



3.5” full-color LCD touch screen

320 x 480 pixel display

Product Dimensions


Length: 3.93 in

Width: 3.93 in

Depth: 0.86 in

Room Sensor

Length: 1.73 in

With stand: 2.12 in

Width: 1.73 in

Depth: 0.78 in

Power Extender Kit*

Length: 2.44 in

Width: 2.36 in

Depth: 0.84 in

*Optional for installation


Gas, oil, electric, dual fuel

Conventional (2H/2C)

Heat Pump (4H/2C)

Humidifier, Dehumidifier, Ventilator, HRV or ERV

Wire Terminals







W1 (AUX 1)

W2 (AUX 2)




Connectivity & Security

Wi-Fi, IEEE 802.11 b/g/n @ 2.4 GHz

Wi-Fi Protected Access (WPA/WPA2) and Wired Equivalent Privacy (WEP)

915MHz, future expansion slot

DHCP (dynamic) or static IP addressing

Transport Layer Security (TLS)


15-20 MB/month

Power Consumption

less than 3.5 VA

Apple HomeKit Enabled

Controlling this HomeKit-enabled accessory requires an iPhone, iPad, or iPod touch with iOS 9 or later.

Powering Methods

Wired 24 VAC through terminals C and Rc or Rh. Power Extender Kit (included) enables you to reliably power your thermostat without having to run a C wire.


Recyclable packaging




ROHS compliant

Temperature Range

Desired Temperature: 44° to 92°F

Display: 41° to 98°F

Sensitivity: +/- 0.9°F

Operating: 32° to 131°F

Humidity Range

Display: 20% to 90% RH

Sensitivity: +/- 5% RH

Operating: 5% to 95% RH (non condensing)


-31° to 113°F

5% to 95% RH (non condensing)


3-year warranty



In the Box

ecobee3 thermostat

Room sensor with detachable stand

Quick start guide

Installation guide

Wire labels

Screws and drywall plugs

Optional for installation:

Power Extender Kit (PEK)

Standard and large trim plates

in the box
View Full Technical Specs

What customers are saying.

2596 Amazon Reviews, 4.5 out of 5 stars

5 stars

Best Household Improvement Ever!

I'm a new homeowner and not yet secure in my DIY skills so I asked my brother-in-law to help me install it, but in truth I could have done it myself! I specifically purchased Ecobee to work with our Amazon Echo and so my husband who has MD can control the temperature and it is perfect!

akoWonderWoman on August 31, 2016
5 stars

Great Customer Service

I love my Ecobee3! We are renters, so this was a big undertaking for us to replace the thermostat that came with our apartment with a digital thermostat. But our air conditioning bills were getting crazy, our thermostat was very unreliable (it would randomly go up to 85 degrees in the middle of the night or other times for no reason), and we wanted to be able to control it from outside the home. We briefly considered The Nest, which has some great rebates from our power company. But after poring over reviews, we decided to go with the Ecobee, mainly because it was Home Kit compatible, and we may want to use that in the future since we have an Apple home network and Apple TV.

Amoki on August 30, 2016
5 stars

Great for too-hot-in-summer and too-cold-in-winter rooms

Product is great (and arrived fast). We needed our baby's room to have a sensor as it is always hotter in the summer and colder in the winter, as it was a guessing game with the original thermostat downstairs. After having 2 professional HVAC people come over and telling us there's nothing we can do with the ducts to improve the situation, we compromised for a smart thermostat to at least eliminate the guessing game (I would still want to change our HVAC configuration, but that's a 10k job).

Bootvi on August 29, 2016
5 stars

I'm in love with my ecobee

I'm in love with my ecobee. Upgraded from an old non-programmable Honeywell thermostat. So far, my HVAC seems to run MUCH less than with the old thermostat. I love the programmable schedules, and the sensor modules. I also installed the unit myself using the Power Extender Kit, and it was super easy. Really looking forward to lower energy consumption (and costs!) with this thermostat.

BigIrishApe on August 25, 2016
5 stars

Great purchase

Better than Nest in that it has discrete external sensors to focus on rooms you care about the most. Easy to program schedule. Set up was overall pretty easy. Love that I can control the temperature on my cellphone. Similar to Nest, it is a good-looking modern product but with (in my opnion) a more pleasant display and touchscreen.

Jacquelyn M. Means on August 24, 2016
5 stars

The functionality and ease of use of this device is amazing. I'm already seeing the energy savings

The functionality and ease of use of this device is amazing. I'm already seeing the energy savings. The sensor system is simply brilliant and the fact that they have motion detectors is amazing. The app is very easy to use and a breeze to setup with apple home. I will be purchasing additional sensors to make it even more smarter around my house. There is a lot of technology here, which is the main reason I choose this over the Nest and also a 3 year warranty.

Y. Acosta on August 24, 2016
5 stars

Best Thermostat On The Market!

I really believe this is the best thermostat on the market. You can place multiple external sensors around the house so that the Ecobee3 (E3) knows that the temperature is in different parts of the house. Since the E3 knows both the temperature in other parts of the house AND if someone is present, it can dynamically "care" about the temperature only in rooms that have recently seen occupancy!

Ken S on July 16, 2016
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