A system that includes a plurality of controllers that are each controller is configured to operate at least a portion of a Heating, Ventilation, and Air Conditioning (HVAC) system. The plurality of controllers are members of an unprovisioned mesh network. The system further includes a network provisioning device that is configured to establish a peer-to-peer connection with the controller. The device is further configured send a request to the controller to identify a wireless network that is in range of one or more controllers that are members of the unprovisioned mesh network and to obtain network credentials for the identified wireless network. The network device is further configured to send the network credentials to the controller to join a provisioned mesh network. The controller is configured to propagate the network credentials to other controllers within the unprovisioned mesh network.