Which is a common failure associated with dampers during testing?

Prepare for the ABAA Whole-Building Airtightness Testing Level 1. Master the concepts with various study materials including flashcards and practice questions. Get ready to ace your exam effortlessly!

The answer regarding dampers operating solely on power supply highlights a specific issue encountered during airtightness testing. Dampers that rely entirely on a power supply for their operation may not close properly in the event of a power failure or malfunction. This can lead to air leakage that compromises the building's overall airtightness.

In the context of whole-building airtightness testing, if dampers fail to close completely, this can result in significant discrepancies in the test results, indicating that the building envelope is less airtight than intended. The performance of dampers is crucial, as they play a role in controlling airflow and maintaining energy efficiency within the building.

On the other hand, considering dampers that are not installed correctly, designed to always stay closed, or too large for the ducts, while they can present issues, they are not specifically tied to the operational failure that power-dependent dampers may experience during testing. Thus, the focus on dependence on a power supply identifies a more critical common failure that can directly affect testing outcomes.

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