iO HVAC Controls EB-3618 36 X 18 Heavy Duty Motorized Electronic Bypass DamperiO HVAC Controls EB 3618 ACTUATORS ARE INSTALLED ON 2ND DIMENSION 36 x 18 Heavy Duty Motorized Electronic Bypass Damper Height: 36 Width: 18 Total Size: 36 x 18 Actuator Placement on the dimension: 18 Additional Information Item NumberEB 3618 BrandiO HVAC Controls MotorizedYes ShapeRectangular Size (in)36 x 18 Spring ReturnNon Spring Return TypeBypass Dampers