ecobee Energy Management System

ecobee EB-EMSSi-01 Energy Management System, Web enabled, WiFi


Manufacturer part number:




The EMS Si is designed to operate with low voltage heating and cooling systems. It is not designed for use with line-voltage or millivolt heating and cooling systems
The EMS Si supports:
Up to 2 heat and 2 cool stages on a conventional system
Up to 3 heat and 2 cool stages on a heat pump system.
The ecobee EMS Si supports the following equipment:
Equipment Supported?
Gas/Oil/Electric heating - Yes, (up to two stages)
Heat pump with auxiliary heat - Yes, (up to three stages)
Geothermal Heat Pump - Yes
Dual fuel systems - Yes
Standard electric cooling - Yes (up to two stages)
Boilers - Yes
Sensors with dry contact outputs - Yes

The ecobee Energy Management System Si (EMS Si) is the newest technology designed for the commercial market. It is ideal in applications
where a simple programmable Thermostat does not provide adequate controls and functionality and a full-scale building automation system is too complex and cost prohibitive. The ecobee EMS Si is user-friendly, reduces a building’s operating costs, and delivers increased energy conservation.
From their EMS Web Portal, users can remotely monitor, identify, analyze and troubleshoot performance issues; manage the temperature and operational settings from a central location; and take action without having to send a technician on-site.
The ecobee EMS Si can maximize any building’s efficiency, reduce energy consumption and deliver significant cost savings.
Technical Support
Our technical support team is available to answer your questions at 1.877.932.6233, or via email at [email protected].

Products specifications
Attribute nameAttribute value
ApplicationConventional or Heat Pump
Brand NameEcobee
Dimensions5.5”W x 3.25”H x 1”D (139.5mm H x 82.5mm W x 25mm D)
DisplayColor LCD
Fan SwitchingAuto-On
Number of Stages2H/2C Conv, 3H/2C H/P
Power SourceHardwired
Programs Per Week7
SeriesEcobee EMS Si
System SwitchingAuto-Heat-Cool-Off
Temperature Settings Per Day7
Terminal DesignationsRc, Y1, W1 (Aux1), Acc+, Rh, Y2, W2 (Aux2), Acc-, G, C, O/B, PEK
TypeInternet enabled, WiFi
Voltage Rating24 VAC (3VA minimum)