ecobee Smart Thermostat Premium Review: The Smartest Climate Control

ecobee packages the Smart Thermostat Premium in a substantial box that reflects its premium positioning and comprehensive feature set. Opening the box reveals the thermostat itself prominently displayed, with its distinctive glass and zinc design immediately signaling quality. Below the main unit, a series of compartments contain the SmartSensor (one included), mounting hardware, wire labels, a power extender kit for homes without a C-wire, and installation guides. The included SmartSensor is a valuable addition that would cost $79 separately - it allows the thermostat to measure temperature in a different room, addressing the common problem of thermostats located in poorly-representative spots. The thermostat unit itself is noticeably heavier than competitors, with a solid zinc frame that provides both aesthetic appeal and EMI shielding for the sensitive air quality sensors inside. The 3.5-inch touchscreen display dominates the face, surrounded by a glass border that catches light attractively. Overall presentation suggests a product designed for homes where aesthetics matter, not just rental-grade functionality.

The Smart Thermostat Premium distinguishes itself from competitors through built-in air quality monitoring that tracks PM2.5 particulate matter, VOCs, and CO2 levels - sensors that typically require a separate $150+ device. The thermostat displays air quality on its screen and can trigger HVAC fan circulation when air quality degrades, actively improving your indoor environment rather than just reporting problems. Compatibility across all major voice assistant platforms - Amazon Alexa, Google Assistant, Apple Siri/HomeKit, and Samsung SmartThings - means the ecobee works regardless of your smart home ecosystem, a significant advantage over platform-locked alternatives. The SmartSensor system enables sophisticated multi-room awareness, with the thermostat using occupancy and temperature data from up to 32 sensors to optimize comfort where you actually are rather than just where the thermostat is mounted. Energy savings analytics are impressively detailed, showing daily, monthly, and yearly breakdowns of heating and cooling costs with comparisons to similar homes in your area. The scheduling system learns from your adjustments and can automatically create optimized schedules, while geofencing uses your phone's location to adjust temperatures when you leave or return home.

Installation testing revealed the ecobee Premium as the most straightforward smart thermostat to install, with excellent in-app guidance that includes video instructions for each wiring scenario. The power extender kit successfully powered our test unit in a home without a C-wire, though installation of that component does add complexity. Air quality monitoring proved valuable in our month-long test, alerting us to elevated PM2.5 during a nearby wildfire event and high CO2 levels in a home office during video conference marathons. The automatic fan circulation response noticeably improved comfort during these events. Energy savings during our test period averaged 15% compared to the previous non-smart thermostat, aligning with ecobee's claims. The detailed reports made it easy to identify high-consumption days and understand what drove them - useful for optimizing schedules and identifying issues like doors left open. SmartSensor integration worked seamlessly, with the thermostat correctly prioritizing occupied rooms and ignoring empty ones. The occupancy detection was reliable, though there's an inherent delay as the system confirms whether presence is sustained. Voice control through Alexa, Google, and Siri all functioned correctly, with natural language understanding that handled requests like "ecobee, make it warmer" appropriately.