Introducing the ecobee Commercial Power Extender, designed to address your thermostat's wiring needs without a C wire. This Power Extender Kit (PEK) is perfect for commercial projects that are lacking a C wire and have at least four wires at the thermostat to work with. The PEK is easily installed at the furnace control board and is wired in with your existing thermostat wires to create a C wire, providing a seamless solution to your wiring challenges. With the ecobee Commercial Power Extender, you can upgrade your thermostat system without the need for extensive rewiring or complex installation processes. Say goodbye to wiring limitations and hello to reliable, efficient temperature control with the ecobee Commercial Power Extender.