commonplace thermostats only the temperature in one room, but are supposed to deliver comfort in all rooms. Ecobee3 far sensors the rightmost temperature in the rooms that matter most. Now homekit. Ecobee3 sensors which rooms are occupied to deliver the rightmost temperature in the rightmost places. And they whether someone 's home to help you save energy and money when you 're away. Ecobee3 with 1 uncommitted far sensor that measures temperature and occupancy. You can up to 32 sensors. The more you, the smarter your Ecobee3 becomes at delivering comfort where it matters and savings where it counts.