What is the second efficiency test for a negative air pressure unit?

The second efficiency test for a negative air pressure unit involves using ventilation smoke tubes and a rubber bulb inspection. This method effectively demonstrates whether the negative air pressure unit is functioning correctly by visually monitoring airflow patterns and ensuring that the unit is effectively containing contaminated air. When smoke is introduced, it allows operators to see if there are any leaks or if the airflow is maintaining the necessary negative pressure in the work area.

While visual inspection might be a part of assessing initial performance, it’s not specifically designed to quantify the efficiency of the negative air system in the same structured way that smoke tests allow. Air quality monitoring focuses on measuring the types and levels of contaminants present in the air rather than addressing the operational integrity of the unit itself. A sound level check would provide information about the noise produced by the unit but does not relate directly to its efficiency or ability to maintain negative pressure, making it an unsuitable choice for this specific evaluation.