Patent ID: 9194600
Filing Date: 2015-11-24
Classification: F24F,G05D

Abstract:
1. A system for controlling an environmental condition of an environmental zone, comprising: a local controller associated with the environmental zone and configured to control an HVAC system operable to modify the environmental condition of the environmental zone; a fan proximate to a vent opening of a duct in the environmental zone, the fan being arranged to receive airflow generated by the HVAC system and passed through the vent opening, the fan being configured to generate power from the received airflow; and a rechargeable power source coupled to the local controller and the fan and configured to store the power generated by the fan and to output power to drive the fan; wherein the local controller is powered at least in part by the rechargeable power source and the local controller causes the fan to pull air from the duct when sufficient power is stored by the rechargeable power source, airflow is present within the duct, and a difference between a setpoint temperature of the environmental zone and a measured temperature of the environmental zone is at least a threshold value.