What component does a duct blower utilize for testing residential duct tightness?

A duct blower is specifically designed to measure the tightness of residential duct systems, and it employs multiple components to conduct this testing effectively. The inclusion of a variable speed fan allows for the adjustment of airflow, which is crucial to creating different pressure conditions within the ductwork. This helps in evaluating how well the ducts maintain pressure and to identify any leaks.

The digital manometer plays a significant role as well. It measures the pressure differential in the ducts before and after the blower is operated, providing precise readings that help determine the duct system’s airtightness. Accurate pressure readings are necessary to assess how much air is escaping from the duct system, which can impact energy efficiency and indoor air quality.

Reducer pieces can also be essential in the process, as they can help connect the duct blower to various sizes of ducts, ensuring a proper seal and allowing for thorough testing across different duct configurations.

Therefore, all these components work together cohesively—supporting the primary function of the duct blower in testing residential duct tightness. Hence, acknowledging all of these components highlights their collective importance in achieving accurate assessment during duct leakage testing.