Bathroom Exhaust Fan: lifespan, maintenance and replacement

Typical lifespan: 8–12 years (about 10 years).

Maintenance schedule

• Clean fan cover and blades — Every 6 months
• Inspect vent duct for blockages — Annually
• Test airflow (hold tissue to grille) — Every 6 months

Signs it needs replacing

• Noticeably louder operation
• Weak airflow
• Moisture still accumulates on mirrors/walls
• Fan won't turn on
• Visible rust on housing

Tips

Run the fan for 20 minutes after showering to prevent mold. A timer switch makes this easy.