iO HVAC Controls EB-12 Electronic 12" Bypass DamperiO HVAC Controls EB 12 ACTUATORS ARE INSTALLED ON 2ND DIMENSION Electronic 12" Bypass Damper EB Series electronic bypass dampers are used to automatically bypass excess air when increases in duct pressure occur due to closing of zone dampers. The EB Series dampers utilize a floating point actuator along with the iO SPC static pressure control. The iO SPC has a fully calibrated setpoint dial for easy setup and adjustment. The iO SPC maintains the