Control Dampers: Design Considerations, Construction, and Pressure Drop Impacts

Abstract:

Control dampers are found throughout HVAC systems and play a critical role in regulating airflow, maintaining occupant comfort, supporting life safety systems, and improving overall building performance. Despite their widespread use, dampers are often treated as simple accessories rather than engineered components that can significantly affect system efficiency, pressure losses, maintenance requirements, and long-term operating costs.

This presentation provides a practical overview of control dampers, beginning with their purpose and applications across commercial buildings, healthcare facilities, laboratories, data centers, rooftop equipment, and other critical environments. Attendees will explore common damper construction materials, frame and blade designs, bearing systems, and corrosion-resistance considerations, as well as the impact these design features have on performance and longevity.

The session also examines the standards and certification programs that govern damper performance, including AMCA testing and certification requirements for air leakage, pressure drop, and thermal efficiency. Particular attention will be given to installation configurations and how mounting methods can significantly influence measured pressure losses and real-world system performance.

Using test data and application examples, the presentation will demonstrate how pressure drop affects fan energy consumption and why proper damper selection and installation are essential for optimizing HVAC efficiency. Attendees will gain a better understanding of how damper design decisions influence system operation, energy use, and lifecycle value, allowing them to make more informed specification and application decisions.

Learning Objectives:

• Identify the primary types of dampers used in HVAC systems and describe their functions and typical applications within buildings.
• Explain the role of dampers in maintaining building safety, HVAC system performance, and occupant comfort.
• Describe key damper construction features, materials, and design characteristics that influence performance and functionality.
• Identify applicable industry codes and standards governing damper design, performance, installation, and operation.
• Differentiate between common damper installation methods and explain how installation requirements affect system performance.
• Evaluate the impact of damper selection and installation on pressure drop, airflow efficiency, and building energy consumption.

Sponsored by: Tamco

Tamco established its presence in the ventilation industry in 1955. In 1980, Tamco began developing a line of high-quality aluminum dampers. Through a commitment to excellence in design, precision, and application, Tamco developed a premium line of aluminum dampers engineered for durability, maintenance-free operation, and energy efficiency. Renowned for their superior performance, Tamco dampers continue to set the benchmark for quality and innovation across the industry.