When you think of digital home thermostats, the Nest Learning Thermostat£197 at Amazon UK is probably the first product that comes to mind. But before Nest burst onto the scene in 2011, Canadian-based Ecobee had already introduced a smart thermostat two years earlier. The company has been at it ever since, and recently released the $249 Ecobee3, an attractive Wi-Fi thermostat that you can control from your iOS or Android phone and from your PC via the Web. The thermostat is easy to install and even easier to program, and it's loaded with features including a remote sensor for heating and cooling rooms outside of the thermostat zone, numerous reminders and alerts, a capacitive touch display, and a Home IQ system monitor that tracks heating and cooling usage. It's our new Editors' Choice for smart thermostats.

Design and Features
The Ecobee3See it at Amazon UK eschews the puck-shaped design of the Nest and the Honeywell Lyric. Instead, the thermostat has a stylish 3.9-inch square housing with rounded corners that is under an inch (0.90-inch) thick. Behind the Ecobee3's black faceplate is a 3.5-inch full color capacitive touch display, and behind that is a white wall plate with 11 terminal connections for heating, cooling, heat pumps, air handlers, and accessories. The Ecobee3 is compatible with most 1- and 2-stage HVAC systems and can control compatible dehumidifier, humidifier, and ventilation devices.

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In the middle of the display is the current temperature, and to the right is a vertical slider for manually setting the temperature. I found the slider to be a bit too sensitive, forcing me to slow down my finger swiping to land on the desired degree mark. Other than that, the screen is very responsive and easy to navigate. A snowflake icon appears above the temperature readout when the system is in cooling mode, and a flame icon appears when it's in heating mode. Below the temperature readout are icons for the Main Menu, Live Weather, and Quick Changes. Quick Changes lets you override your current heating, cooling, and ventilator settings without changing your programmed schedule. Live Weather shows the current local weather conditions with temperatures and icons for snow, rain, clouds, or sun. It also displays the extended weekly forecast.

The Main Menu is where you go to enable and disable your HVAC system and set fan runtimes. Here you can also set Comfort settings for when you're home, away, or asleep, and create daily and weekly schedules using these settings. You can also set a vacation schedule based on your departure and arrival dates and times, and set a temperature for that timeframe. The Ecobee3 offers a nice selection of alerts and reminders for things like maintenance, filter replacement, UV lamp replacement, low and high temperature, and low and high humidity. You can have notifications pushed to your smartphone and sent to an email address.

The iOS and Android apps offer the same basic functionality as the thermostat menus, but you can't configure the remote sensors from the app; that must be done directly on the thermostat. The Web app looks similar to a Windows 8 desktop, and is populated with tiles for Weather, Quick Changes, Vacation, Settings, Reminders and Alerts, Schedule, and Home IQ. The Home IQ feature, which is only available on the Web app, offers colorful graphs that show you a historical track of HVAC usage for the entire system. You can also see what the outside temperature was during a specific time to see how it impacted your HVAC system.

Included in the box is a single remote temperature and motion sensor that can be placed in any room. The sensor measures the temperature in the room and sends a call to the thermostat to ensure that the room is heated or cooled to the house temperature setting. It also works with Ecobee's Smart Home/Away feature, which uses the sensor's motion detector to bring the room up to temperature (Home mode) when it is occupied, and suspend heating and cooling (Away mode) when it is empty. Additional sensors go for $79 for a two-pack, and the Ecobee3 supports up to 32 sensors.

Installation and Performance
Installing and configuring the Ecobee3 is fairly easy. If you're not familiar with thermostat wiring, you can refer to the comprehensive and easy to follow printed installation guide. It does require a C (common) wire, which supplies power to the thermostat, but if your system doesn't have one, don't despair: The Ecobee3 comes with a Power Extender Kit that supplies power to the thermostat. The power kit is not difficult to install, and Ecobee provides explicit instructions. It does require tinkering with your furnace wiring, so if you're not comfortable with that, you might want to bring in a professional.