The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 01, 2025
Filed:
Aug. 19, 2024
Robert J. Mowris, Olympic Valley, CA (US);
James Lau, Tustin, CA (US);
Robert J. Mowris, Olympic Valley, CA (US);
John Walsh, Bozeman, MT (US);
Abstract
An occupancy fan controller method to detect a Heating, Ventilating Air Conditioning (HVAC) fan is operating based on a fan-on duration control selected by a user and after a fan-on delay selected by the user, overriding the fan-on duration control. The method comprises monitoring an occupancy sensor signal to determine an occupancy in a conditioned space served by an HVAC system and automatically overriding the fan-on duration control to save energy when the conditioned space is unoccupied. The overriding may comprise waiting until after a fan-off delay, operating the HVAC fan in auto mode based only on a thermostat call for cooling or a thermostat call for heating, controlling an economizer damper to reduce or increase outdoor airflow, and operating the HVAC fan for a variable fan-off delay after the thermostat call for cooling or heating based on the duration of the thermostat call for cooling or heating.