Ecobee Smart Thermostat There is a reason why we call this the ecobee Smart Thermostat. For one thing, it is internet enabled through WiFi so that you can easily monitor and manage your home comfort. It is also a smart way to save money and reduce your environmental impact. Genius. Home IQ now available Ecovee Smart Si Thermostat ecobee is proud to introduce our latest product: the Smart Si thermostat. Offering another easy, smart, energy solution for your home, the Smart Si delivers the quality, innovation and great features you would expect from ecobee—all at a great price.