Lennox 29F66 – ecobee EB-PEK2-01 Power Extender Kit (PEK) is an OEM installation accessory designed to provide continuous power to compatible ecobee smart thermostats in HVAC systems that do not have a dedicated common (C) wire. This kit allows installers and homeowners to complete smart thermostat upgrades without running additional wiring, making it an efficient and cost-effective solution for many residential applications.

The Power Extender Kit is engineered for use with most standard 24VAC HVAC systems and integrates directly at the furnace or air handler control board. Clearly labeled adapter wires and straightforward installation steps help reduce setup time and minimize installation errors. By supplying reliable power, the PEK ensures stable thermostat operation, consistent Wi-Fi connectivity, and full access to smart thermostat features.

Lennox 29F66 is compatible with a wide range of ecobee thermostats, including ecobee3, ecobee3 lite, ecobee4, ecobee SmartThermostat Pro with voice control, ecobee Smart Thermostat Enhanced, ecobee Smart Thermostat Premium, and ecobee Smart Thermostat Lite. This makes it an ideal solution for HVAC professionals servicing multiple thermostat models or homeowners upgrading older systems.

This Power Extender Kit is not compatible with millivolt systems, high-voltage systems, dual transformer setups, fan coil units, or communicating HVAC systems. When installed in supported systems, it simplifies thermostat upgrades while maintaining OEM-level reliability and performance.

Brand: ecobee
Catalog Number: 29F66
Model / Part Number: EB-PEK2-01
Type: Power Extender Kit (PEK)
Base Unit of Measure: Unit(s)
Gross Weight: 1.23 lb

Lennox 29F66 ecobee Power Extender Kit is a practical HVAC accessory for smart thermostat installations, helping eliminate common wiring limitations while delivering dependable power and seamless ecobee thermostat integration.