Product Brochure
Compatibility
Conventional (2H/2C)—Gas, Oil, Electric.
Boiler (2-stage-heating).
Air-Cooled & Geo-Thermal Heat pumps
(2 stage heath pump + 2 stage aux heat/
2 cool) (4H/2C). Dual-Fuel support.
Highrise Heat Pump (3 speeds)
PTAC (2 speeds)
2-Pipe Fan Coil Unit (3 speeds)
2-Pipe Fan Coil Unit with Auto
Changeover (3 speeds)
4-Pipe Fan Coil Unit (3 speeds)
To check compatibility visit:
ecobee.com/compatibility
Wire Terminals
RC
G
Y1
Y2
O/B
RH
C
W1
W2
PEK
Powering method
Wired 24VAC through terminals C or Rc.
Power Extender Kit enables you to reliably
power your thermostat without having to
run a C wire.
Power consumption and bandwidth
Less than 3.5VA
15-20 MB/month
Connectivity and security
Wi-Fi, IEEE 802.11 b/g/n @ 2.4 GHz
Wi-Fi Protected Access (WPA/WPA2)
Wired Equivalent Privacy (WEP)
DHCP (dynamic) or static IP addressing
Transport Layer Security (TLS)
915MHz
Display
3.5” full-color touch screen LCD
320 x 480 pixel display
Thermostat sensors
Temperature
Humidity
Proximity
Sustainability
Mercury-free
Arsenic-free
PVC-free
RoHS Compliant
Temperature range
Temperature: 45° to 92°F (7° to 33°C)
Display: 40° to 100°F (5° to 37°C)
Sensitivity: +/- 1°F (+/- 0.5°C)
Operating: 32° to 130°F (0° to 55°C)
Humidity range
Display: 20% to 90% RH
Sensitivity: +/- 5% RH
Operating: 5% to 95% RH (non-condensing)
Storage
Temperature: -31°F to 113°F (-35°C to 45°C)
Humidity: 5% to 95% RH
ecobee.com/smartthermostats
What’s in the box
ecobee3 lite thermostat
Mounting plate
Install guide
Wire Labels
Screws & drywall plugs
Power Extender Kit*
Trim plate*
*Optional for installation
Warranty
3-year warranty
Product dimensions
ecobee3 lite
Length: 102.88 mm (4.05 in)
Width: 102.88 mm (4.05 in)
Depth: 21.4 mm (0.84 in)
Trim Plate
Length: 170 mm (6.69 in)
Width: 170 mm (6.69 in)
Depth: 6.25 mm (0.25 in)
Power Extender Kit
Length: 62 mm (2.44 in)
Width: 62 mm (2.44 in)
Depth: 23 mm (0.90 in)
Works with other ecobee products
Our ecobee3 lite seamlessly connects
to ecobee Smart Security (subscription
required), alongside our SmartSensors,
SmartCamera with voice control, and
SmartSensors for doors and windows.
© 2021 ecobee Inc. All rights reserved. ecobee and the ecobee logo are trademarks of ecobee Inc., registered in the U.S. and other countries. Designed in Canada. Apple HomeKit technology provides
an easy, secure way to control your home’s lights, doors, thermostats, and more from your iPhone or iPad. Controlling this HomeKit-enabled accessory requires an iPhone or iPad with iOS 9 or later.
Apple, iPhone and iPad are trademarks of Apple Inc., registered in the U.S. and other countries. HomeKit is a trademark of Apple Inc. Google is a trademark of Google LLC. Amazon, Alexa and all
related logos are trademarks of Amazon.com, Inc. or its afliates.