How many wires do you need for a Wi-Fi thermostat?
How many wires do you need for a Wi-Fi thermostat? 4 Wire Thermostat Wiring (Heat Pumps, HVAC) Smart thermostats like Nest and Ecobee thermostats require 4 wire thermostat wiring to function properly. In addition to heating (2 wire thermostats) and C or fan (3 wire thermostats), 4 wire thermostats include…