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Get Alexa voice support by upgrading to ecobee4.

Only $30 more at $199

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  • ecobee3 lite
  • ecobee3 lite
  • ecobee3 lite

ecobee3 lite

The smarter wi-fi thermostat that delivers unparalleled value, control and comfort.

Optional add-ons and bundles

Ecobee Switch+ Bundle Optinal Product Image
Switch+ add-on $99 $49

For a limited time only, add an ecobee Switch+ to your order for only $49. Upgrade your home lighting with the first smart light switch with built-in Amazon Alexa. Limit one discounted Switch+ per thermostat.

Add to order
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Ecobee Switch+ Bundle Optinal Product Image
ecobee3 lite Smarter Bundle $233 $203

Add Room Sensors® for just $64 more. Place them in areas that are too hot or cold for more comfort when you’re home, and more savings when you’re away.

Learn more about the bundle
Ecobee Black Friday

So smart it pays for itself

Get $30 off ecobee3 lite from Nov. 13 - 27

$169 $139 (ecobee3 lite)
Free shipping (2-3 days)
30-day money back guarantee
3-year warranty
ENERGY STAR® certified
SUPPORTS
AND MORE

Save an average 23% on your heating and cooling each year. For full details, visit ecobee.com/savings.

Easily adjust temperature and comfort settings from your Android and iOS devices.

Works with room sensors to measure temperature and occupancy in the rooms they’re in to help manage hot and cold spots throughout the home. Sensors sold separately.

Get free monthly reports on how much energy you've saved and tips on how you can save even more.

Fast, easy installation in 30 minutes or less. Use our handy step-by-step guide right on your phone.

Hardwired for reliability means ecobee doesn't steal power from your equipment to charge itself.

on your heating and cooling each year. For full details, visit ecobee.com/savings.
and comfort settings from your Android and iOS devices.
to measure temperature and occupancy in the rooms they’re in to help manage hot and cold spots throughout the home. Sensors sold separately.
on how much energy you've saved and tips on how you can save even more.
in 30 minutes or less. Use our handy step-by-step guide right on your phone.
means ecobee doesn't steal power from your equipment to charge itself.

Install with confidence knowing expert help is just a call away.

Our friendly support team is ready to help with even the toughest questions.

Contact Support chevron icon

Technical Specs

Display

3.5" full-color LCD touch screen
320 x 480 pixel display

Product Dimensions

Thermostat
Length: 102.88 mm
Width: 102.88 mm
Depth: 21.4 mm

Power Extender Kit*
Length: 62.1 mm
Width: 60.1 mm
Depth: 21.4 mm
*Optional for installation

Trim Plate
Length: 170 mm
Width: 170 mm
Depth: 6.25 mm

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

wifi, 802.11 b/g/n @ 2.4 GHz
WEP 64, WEP 128, WPA and WPA 2 encryption methods
DHCP (dynamic) or static IP addressing
168 bit SSL encryption

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 fifth wire.

Green

Recyclable packaging
Mercury-free
Arsenic-free
PVC-free
ROHS compliant

Temperature Range

Desired Temperature: 7° to 33°C
Display: 5° to 37°C
Sensitivity: +/- 0.5°C
Operating: 0° to 55°C

Humidity Range

Display: 20% to 90% RH
Sensitivity: +/- 5% RH
Operating: 5% to 95% RH (non condensing)

Storage

-35° to 45°C
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

Compare Thermostats

Compare Thermostats

ecobee4

ecobee3 lite

Price

$199

$139

Built-in Amazon Alexa (voice enabled)

Yes
No

Far field voice technology

Yes
No

Works with Room Sensor™

Yes; 1 free in box
Yes; sold separately

Integrations

Apple HomeKit, SmartThings, IFTTT, Built-in Amazon Alexa
Apple HomeKit, SmartThings, IFTTT, Works with Amazon Alexa

Display

3.5" Full Color (320X480)
3.5" Full Color (320X480)

Power Extender Kit / C wire for reliability

Yes; in the box
Yes; in the box

Occupancy detection

Yes; thermostat + room sensors
Yes; room sensors

Smart algorithms

Yes
Yes

Free online energy report (HomeIQ)

Yes
Yes

Warranty

3 year customer install
3 year customer install

Wifi

2.4GHz b/g/n
2.4GHz b/g/n

Compatibility

· Conventional (2H/2C).
· Heat pump (4H/2C) incl. 2-stage auxiliary heat.
· Gas, oil, electric.
· Dual fuel support.
· Conventional (2H/2C).
· Heat pump (4H/2C) incl. 2-stage auxiliary heat.
· Gas, oil, electric.
· Dual fuel support.

Accessory support (Humidifier, dehumidifier, ventilator, ERV, HRV)

Yes
No