Description
The Field Controls 46590504 4″ Fresh Air Damper FAD-4 manages the entry of outdoor air into HVAC systems by adjusting airflow through the intake duct. Built for 4-inch duct applications and powered by a 24 VAC control signal, it responds to system operation by positioning the damper blade as needed. It is typically installed along fresh air duct lines connected to air handlers or return plenums. In operation, it helps regulate outside air introduction, contributing to proper ventilation balance and consistent indoor air circulation.
