A 4-wire thermostat system is usually associated with a single-stage furnace. This type of system is quite common in older homes or basic heating systems. The four wires typically include power, ground, heating, and cooling control. This setup is adequate for controlling the essential functions of a standard HVAC system without advanced features like multi-stage heating or cooling. For more complex systems or additional features like a fan control or heat pump management, more wires might be necessary. For detailed information on thermostat wiring color codes, visit HVAC Alliance Expert.
How does thermostat wiring affect energy efficiency?
The wiring of a thermostat plays a significant role in the energy efficiency of an
