Specification Sheet

*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.
COMPATIBILITY
Conventional (2H/2C)—Gas, oil, electric.
Boiler (2-stage-heating).
Air-Cooled & Geo-Thermal Heat pumps
(2 stage heat pump + 2 stage aux heat/2
cool) (4H/2C).
Dual-Fuel support.
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
Less than 3.5VA
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
BANDWITH
15-20 MB/month
SUSTAINABILITY
Mercury free
Arsenic free
PVC free
ROHS compliant
THERMOSTAT SENSORS
Temperature
Proximity
Humidity• Humidity
ROOM SENSOR
Temperature
Motion
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
-31° to 113°F (-35° to 45°C)
5% to 95% RH (non condensing)
LANGUAGES
English
DISPLAY
3.5” full-color LCD touch screen
320 x 480 pixel display
HOMEKIT-ENABLED
HomeKit requires an iPhone, iPad, or iPod
touch with iOS 9 or later. Controlling
HomeKit-enabled accessories away from
home requires an Apple TV with tvOS 9.0 or
later and an iPhone, iPad, or iPod touch with
iOS 9 or later.
WARRANTY
5-year warranty
(PRO Install only)
WHAT’S IN THE BOX
ecobee3 lite thermostat
Install guide
Backplate
Trim plate
Screws
Dry wall plugs
Wire labels
Power Extender Kit
PRODUCT DIMENSIONS
Thermostat
Length: 4.05 in (102.88 mm)
Width: 4.05 in (102.88 mm)
Depth: 0.8 in (21.4 mm)
Trim Plate
Length: 6.7 in
(170 mm)
Width: 6.7 in (170 mm)
Depth: 0.2 in (6.25 mm)
Power Extender Kit
Length: 2.4 in (62.1 mm)
Width: 2.36 in (60.1 mm)
Depth: 0.8 in (21.4 mm)
TECH SPECS
No recharging or power stealing.
It’s the smart thermostat Pros trust.
™