The ecobee3 Smart Thermostat has just gone on sale on Amazon for $199. That’s the lowest price this WiFi connected thermostat has ever been. This is the first thermostat to add Alexa compatibility, which means you’ll be able to control it using the voice remote through the Fire TV, as well as all other Alexa-enabled devices. Unlike other smart thermostats, the ecobee3 comes with a remote sensor which allows it to detect temperatures and occupancy in two separate locations of your home. This allows it to better detect when you’ve left the house and more accurately control your home’s temperature. Additional sensors, up to 32 total, can be added to make the thermostat even more efficient.