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  • Smart Si
  • Smart Si

Smart Si

Enjoy lower heating and cooling costs without compromising your comfort from the moment you turn on your ecobee Smart Si. You can monitor and control your wi-fi connected ecobee thermostat anytime, from anywhere, on your smartphone, tablet, or computer.
179.00
30-day money back guarantee
3 year warranty
SUPPORTS
AND MORE

Smart, really smart Smart Si intuitively understands when to turn on your heating or cooling equipment based on your home's unique energy profile and the weather outside, making sure you're comfortable at all times.

Reliable Technology ecobee is hard-wired for reliability and has been since 2009 when we created the world's first wi-fi smart thermostat. Unlike some competitors we don't use power stealing because it is unreliable.

Lower your energy bills ecobee saves homeowners an average of 23% annually, paying for itself in energy savings. Learn more at ecobee.com/Savings.

Buy with confidence ecobee Smart Si is compatible with 95% of homes in North America and our Compatibility Checker ensures you make the smart choice. Each thermostat comes with a 3-year warranty and dependable technical support.

Anytime, anywhere Monitor and control your wi-fi connected Smart Si anytime from anywhere, on your smartphone, tablet, or computer

Smart Si intuitively understands when to turn on your heating or cooling equipment based on your home's unique energy profile and the weather outside, making sure you're comfortable at all times.
ecobee is hard-wired for reliability and has been since 2009 when we created the world's first wi-fi smart thermostat. Unlike some competitors we don't use power stealing because it is unreliable.
ecobee saves homeowners an average of 23% annually, paying for itself in energy savings. Learn more at ecobee.com/Savings.
ecobee Smart Si is compatible with 95% of homes in North America and our Compatibility Checker ensures you make the smart choice. Each thermostat comes with a 3-year warranty and dependable technical support.
Monitor and control your wi-fi connected Smart Si anytime from anywhere, on your smartphone, tablet, or computer

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

2.5" full-color LCD non-touch screen
320 x 240 pixel display

Product Dimensions

Length: 3.25 in/82.5 mm
Width: 5.5 in/139.5 mm
Depth: 1 in/25 mm

Compatibility

Conventional (2H/2C)
Heat Pump (3H/2C) incl. 1-stage auxiliary heat
Gas, oil, electric, dual fuel

Wire Terminals

Rc
Rh
G
C

Y
Y2
W O/B
W2 (AUX2)

Connectivity & Security

802.11 b/g/n wireless routers
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

Powering Methods

Note: 'G' wire powering limits fan control

24VAC (3VA minimum)
Option to reliably power through substituion of 'G' wire for 'C' 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)

Warranty

3 year warranty

Languages

English

In the Box

ecobee3 Smart Si thermostat
Installation guide
Jumper wire
Large trim plate