What are the signs that an LEV system is underperforming in day-to-day use?

Underperforming LEV systems often give warning signs long before a formal test fails. Visible dust or fumes escaping from the process area is one of the most obvious indicators. Strong smells lingering in the workspace can also suggest poor capture.

Users may report irritation to eyes or throat, or notice that the system “doesn’t feel as strong” as it used to. Hoods that have been moved, damaged, or partially blocked often reduce effectiveness without anyone realising.

From a maintenance perspective, damaged ducting, missing access doors, or clogged filters are common causes of reduced performance. Noise changes can also be a clue that airflow has altered.

These signs shouldn’t be ignored. Day-to-day observations are often the earliest indicator that an LEV system needs attention.