Ordinary thermostats read the temperature in only one room, but are supposed to deliver comfort in all rooms. ecobee3 remote sensors deliver the right temperature in the rooms that matter most. ecobee3 sensors know which rooms are occupied to deliver the right temperature in the right places, and they know whether someone’s home to help you save energy and money when you’re away. ecobee3 comes with 1 free remote sensor that measures temperature and occupancy. You can have up to 32 sensors for every room in your home. The more you add, the smarter your ecobee3 becomes at delivering comfort where it matters and savings where it counts. It comes with the knowledge that most people are asleep between 11:30 pm and 6:00 am, but you can change your schedule in seconds. It intuitively understands when to turn on your heating or cooling equipment based on your home’s unique energy profile, your schedule and the weather outside, and all these can be controlled remotely using your smartphone.