Patent ID: 11879651
Assignee: nan
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. A Heating, Ventilating, Air Conditioning (HVAC) fan control method, the method comprising:
detecting an HVAC fan is controlled by at least one fan-on duration control selected by a user with a User Interface (UI);
wherein the at least one fan-on duration control operates the HVAC fan to recirculate air in a conditioned space for the at least one fan-on duration selected by the user; and
monitoring an occupancy sensor signal from an occupancy sensor configured to determine an occupancy in the conditioned space served by an HVAC system and automatically overriding the at least one fan-on duration control to save energy when the conditioned space is unoccupied based on the occupancy sensor signal and operating the HVAC fan based only on a thermostat call for cooling or a thermostat call for heating.