How long should demand system and air pressure tests last during inspection?

The correct duration for conducting demand system and air pressure tests during an inspection is 10 minutes. This timeframe allows for an adequate assessment of the system's performance and ensures that any potential leaks or deficiencies can be detected effectively. A 10-minute test duration strikes the right balance between being long enough to gather reliable data on the system's operability and short enough to minimize disruption during the inspection process. Inspections that last for a shorter period, such as 5 minutes, may not provide enough time to thoroughly evaluate the integrity of the system, while durations longer than 10 minutes may not be necessary and could lead to inefficiencies in the inspection workflow.