What is a common tool used to detect air leaks that utilizes pressure differences?

A manometer is a commonly used tool for detecting air leaks by measuring pressure differences in a building's envelope. It operates by measuring the pressure of the air within a space compared to the outside atmosphere. This pressure differential helps to identify areas where air may be leaking in or out.

When a space is depressurized or pressurized, the manometer can reveal how varying pressures affect the integrity of the building envelope. By utilizing a manometer, practitioners can pinpoint weaknesses and gaps in air barriers, thereby facilitating more effective air sealing solutions.

In contrast, smoke puffers are primarily used for visualizing airflow; thermography detects temperature variations but does not necessarily quantify pressure; and drones are mainly used for visual inspections of building exteriors. These tools serve different purposes and may not provide the precise pressure differential measurement that is critical for identifying air leaks effectively.