The 24V Automatic Rectangular Damper by METROPAC measures 16x18 inches and is designed for optimal airflow control in HVAC systems. This damper features a durable construction that ensures long-lasting performance and reliability. It operates on a 24V power supply, making it compatible with most standard HVAC systems. The automatic function allows for precise control of air distribution, enhancing energy efficiency and comfort in residential and commercial spaces. Ideal for use in ventilation and air conditioning applications.