A damper designed to be installed with blades in the airstream is known as __________.

A damper designed to be installed with blades in the airstream is referred to as type A. This design allows the damper blades to effectively control the flow of air by being positioned directly in the airflow. This configuration is beneficial for applications requiring precise airflow regulation, as the blades are positioned to act directly on the moving air, creating optimal control of the air dynamics within the system.

In various HVAC systems, type A dampers are commonly used in applications where duct pressure modulation is necessary, ensuring energy efficiency and maintaining desired environmental conditions. The blade positioning contributes to minimal resistance within the duct system, thus improving overall performance.

Understanding these distinctions helps clarify the role and functionality of different damper types in HVAC setups, ensuring proper system design and operation.