The included power extender kit was specifically praised as a helpful addition for homes without an existing common wire.
Pros: Wi-Fi stability, Apple Home/HomeKit support
Cons: utility demand-response support, HVAC system compatibility depth
Best Smart Thermostats for included C-wire adapter
Reviewers liked that Ecobee includes a power extender/C-wire adapter option, especially for setups without a common wire.
Pros: conventional HVAC compatibility, touchscreen responsiveness
Cons: presence-based automation
Reviewers noted the box is nearly complete, but the C-wire adapter is not included.
Pros: comfort consistency, privacy controls
Cons: heat pump compatibility, included C-wire adapter
The C-wire workaround is a weakness because the power extender kit is described as sold separately and required for homes without a C wire.
Pros: temperature accuracy, humidity sensing
Cons: included C-wire adapter, Matter support