Bring home ecobee3 lite and save up to 23%* annually on your heating and cooling costs.
ENERGY STAR® certified, so you know it's good for you and the planet.


Effortless control at your fingertips.
Engineered for energy savings. Designed for you.



Pair your ecobee3 lite with sensors for all-around comfort and savings.
Pair your ecobee3 lite with sensors for all-around comfort and savings.
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SmartSensor Measure temperature and occupancy in the rooms they’re in to help manage hot or cold spots throughout the home.
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More Savings Automatically adjusts your ecobee to the right mode for savings when it senses you're not home.
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More Control Get room-specific temperature and occupancy readings with the ecobee mobile app on your iOS or Android device.



Supports your connected home to make life simpler.
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.
Getting started is simple.
Will it work with my home?
Yes, we are compatible with most residential heating and cooling systems.
Can I install it myself?
You bet. Use our step-by-step guide or call our friendly support team.
Can I get it professionally installed?
Yes, we can help connect you with certified pro installers in your area.
You have better things to do than teach your thermostat.
Features
ecobee3 lite understands how your home heats up and cools down, and uses wi-fi to track your local weather throughout the day. It then uses this information to determine the best way to bring your home to your desired indoor temperature when you arrive home and maintain it while minimizing how long your heating or cooling equipment runs for.
ecobee thermostats are compatible with Amazon Echo, Apple Homekit, IFTTT and many more home automation ecosystems. ecobee has a robust API and an active developer community working on new ways to integrate your thermostat into your connected home.
ecobee3 lite is constantly monitoring your equipment performance and will send you an alert if anything is not working or working sub-optimally. Similarly, ecobee3 lite can send you service reminders to help you maintain your equipment.
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Technical Specs

Display
3.5” full-color LCD touch screen
320 x 480 pixel display
Product Dimensions
Thermostat
Length: 4.05 in
Width: 4.05 in
Depth: 0.84 in
Trim Plate
Length: 6.69 in
Width: 6.69 in
Depth: 0.24 in
Power Extender Kit*
Length: 2.44 in
Width: 2.36 in
Depth: 0.84 in
*Optional for installation
Compatibility
Gas, oil, electric, dual fuel
Conventional (2H/2C)
Heat Pump (4H/2C)
Wire Terminals
Rc
Rh
G
C
Y1
Y2
W1 (AUX 1)
W2 (AUX 2)
O/B
PEK
Connectivity & Security
Wi-Fi, IEEE 802.11 b/g/n @ 2.4 GHz
Wi-Fi Protected Access (WPA/WPA2) and Wired Equivalent Privacy (WEP)
DHCP (dynamic) or static IP addressing
Transport Layer Security (TLS)
915 MHz
Bandwidth
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.
Green
Recyclable packaging
Mercury-free
Arsenic-free
PVC-free
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)
Storage
-31° to 113°F
5% to 95% RH (non condensing)
Warranty
3-year warranty
Languages
English
In the Box
ecobee3 lite thermostat
ecobee3 lite backplate
Installation guide
Wire labels
Drywall plugs
Screws
Optional for installation:
Power Extender Kit (PEK)
Large trim plate

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Avoid plastic and e-waste and extend the life of a high-quality product.
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Guaranteed renewed and reliable thanks to being inspected, re-worked, and re-tested by the original manufacturer.
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A 3-year warranty is standard for all Factory Re‑Certified ecobee3 lite Smart Thermostats.
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Save money and up your comfort with our award-winning technology—at a fraction of the price.