Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
If I am following correctly, the bypass air only affects the exhaust fan power consumption; it has no impact on the zones and/or system. I would use an EMS program with a sensor on the exhaust fan inlet node volume flow rate and an actuator on the exhaust fan "Fan Pressure Rise". Since the fan power is proportional to the pressure rise, then the EMS program can adjust that anytime that the node flow rate is below the minimum.
