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
Our friendly support team is ready to help with even the toughest questions.Contact Support >
2.5" full-color LCD non-touch screen
320 x 240 pixel display
Length: 3.25 in/82.5 mm
Width: 5.5 in/139.5 mm
Depth: 1 in/25 mm
Heat Pump (3H/2C) incl. 1-stage auxiliary heat
Gas, oil, electric, dual fuel
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
less than 3.5 VA
Note: 'G' wire powering limits fan control
24VAC (3VA minimum)
Option to reliably power through substituion of 'G' wire for 'C' wire
Desired Temperature: 7° to 33°C
Display: 5° to 37°C
Sensitivity: +/- 0.5°C
Operating: 0° to 55°C
Display: 20% to 90% RH
Sensitivity: +/- 5% RH
Operating: 5% to 95% RH (non condensing)
3 year warranty
ecobee3 Smart Si thermostat
Large trim plate