What does a “duct blaster test” measure?

A duct blaster test specifically measures the airtightness of ductwork within a building's heating, ventilation, and air conditioning (HVAC) system. This test involves pressurizing the duct system with a measured flow of air and determining the amount of air leakage that occurs. By measuring how much air escapes through cracks and leaks in the ductwork, the test provides valuable data on the efficiency of the ducting system. Proper duct sealing is critical to ensure that the conditioned air is delivered effectively to the intended spaces without significant losses, which can impact overall energy efficiency and comfort in the home.

The other options do not accurately describe the purpose of a duct blaster test. While the efficiency of the HVAC system may be indirectly affected by duct leakage, this test does not directly measure system efficiency, heating and cooling output, or insulation quality. The primary focus is solely on how airtight the ducts are, making it an essential evaluation for diagnosing airflow issues and enhancing the performance of HVAC systems.