Which technique is used in ventilation maintenance?

Which technique is used in ventilation maintenance?

• A. Tracer smoke test
• B. Pressure decay test
• C. Infrared thermography
• D. Smoke pencil

Answer: (A)

Visualizing how air moves through a ventilation system is essential in maintenance. A tracer smoke test introduces a safe smoke into the ductwork and lets it flow with the air. Where the smoke travels shows the exact paths of airflow and reveals leaks, gaps, or weak seals as the smoke escapes or backflows. This makes it a practical, quick, and visual way to locate problem areas across the whole duct network, verify proper sealing, and confirm that supply and exhaust paths are functioning as intended. The other methods aren’t as well suited for routine ventilation maintenance. A pressure decay test focuses on how the system holds or loses pressure over time and is more aligned with commissioning or strict leakage-rate assessments rather than ongoing upkeep. Infrared thermography can spot temperature differences to infer issues but may miss leaks that don’t produce a noticeable thermal signature and requires specialized equipment and interpretation. A smoke pencil can show air movement in small, accessible spots, but it’s limited to local areas and won’t reliably map the entire duct system like tracer smoke.

Visualizing how air moves through a ventilation system is essential in maintenance. A tracer smoke test introduces a safe smoke into the ductwork and lets it flow with the air. Where the smoke travels shows the exact paths of airflow and reveals leaks, gaps, or weak seals as the smoke escapes or backflows. This makes it a practical, quick, and visual way to locate problem areas across the whole duct network, verify proper sealing, and confirm that supply and exhaust paths are functioning as intended.

The other methods aren’t as well suited for routine ventilation maintenance. A pressure decay test focuses on how the system holds or loses pressure over time and is more aligned with commissioning or strict leakage-rate assessments rather than ongoing upkeep. Infrared thermography can spot temperature differences to infer issues but may miss leaks that don’t produce a noticeable thermal signature and requires specialized equipment and interpretation. A smoke pencil can show air movement in small, accessible spots, but it’s limited to local areas and won’t reliably map the entire duct system like tracer smoke.