A reliable ventilation system is essential for ensuring good air quality in a building. Over time, a ventilation system (CMV, ducts, fans) can wear out or become clogged, compromising its efficiency. It is crucial to know how to spot the signs of wear and tear in a ventilation system so that action can be taken before it breaks down.
Signs of wear and tear in a ventilation system
Building managers and occupants should be alert to several signs that may indicate a ventilation problem:
- Excessive condensation on windows or walls: If fogging persists or traces of moisture appear regularly, this is often a sign of insufficient ventilation that is no longer properly removing stale air.
- Unusual noises or abnormal silence: Squeaking, whistling, or humming noises coming from the ducts indicate a problem, as does the complete absence of noise from a system that should be running. These sounds may signal an unbalanced fan, worn bearings, or debris blocking the ducts.
- Mold growth: Mold spots on walls or ceilings, especially in damp rooms, indicate a lack of air renewal. Stagnant air promotes the growth of fungi.
- Persistent odors and stale air: A musty smell or odors lingering in rooms indicate that the system is no longer extracting pollutants properly. A dirty system can redistribute dust and allergens, degrading indoor air quality.
- Decreased performance and excessive energy consumption: If certain areas become difficult to heat or cool, or if energy bills rise for no apparent reason, ventilation may be the cause. Clogged ducts or a worn-out fan force the system to work harder.
Take action at the first sign
When one or more of these signs are noticed, it is time to have the ventilation system checked by a professional. Often, simply cleaning the ducts or replacing a part (fan motor, clogged filter) will give the installation a new lease of life. Not waiting for a complete breakdown avoids prolonged system downtime and higher repair costs. Regular maintenance of your ventilation system (for example, annual maintenance for a dual-flow CMV) ensures healthy air for occupants while extending the life of the equipment.
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