Patent ID: 9500382
Filing Date: 2016-11-22
CPC Classification: F24F,Y02B

Claim Text:
1. A Demand Control Ventilation (DCV) system for a building, comprising: a first temperature sensor positioned to sense an outside air temperature; a second temperature sensor positioned to sense a return air temperature; one or more dampers, each of the one or more dampers for controlling a flow of air into or out of the building; a controller, the controller configured to control a position of the one or more dampers; wherein the controller is further configured to automatically determine one or more calibrated damper position settings at which a flow rate of outside air drawn through the damper and into the building matches a corresponding predetermined ventilation setting, the controller using one or more flow rates that are based on measurements of one or more sensors to determine the one or more calibrated damper position settings, the controller automatically determining from time to time the one or more calibrated damper position settings when one or more predetermined environmental conditions are detected; wherein the controller is programmed to use the one or more calibrated damper position settings to achieve a desired ventilation rate; and wherein the one or more predetermined environmental conditions comprise at least a predetermined temperature differential between the return air temperature and the outside air temperature.