ecobee thermostats require a C (popular) wire to energy on. In case your current thermoregulator uses just two cables (R and W, or T and T), you will find a few installation choices available, according to the job.
You simply will not have the ability to install the Power Extender Kit (PEK) with heat-only systems that are 2-wire. The PEK can only just be applied on furnace or temperature pump systems which do not have C cable вЂ” it is because the PEK calls for R (energy), G (fan), and Y (compressor) wires to use, and these 2-wire systems that are heat-only not need these G and Y wires
Continue Reading My thermostat has just two cables. Am I suitable for ecobee?