Cleaning Ventilation Systems

Overview
Ventilation and air duct cleaning helps maintain indoor air quality, reduces dust circulation, and improves HVAC efficiency. Cleaning these systems removes accumulated debris, mold spores, and allergens that can pose respiratory risks to building occupants and cleaning staff.

Safety & Preparation

Before starting:

• Shut down the HVAC system and disconnect power to prevent fan activation.
• Wear respiratory protection (N95 or higher), safety goggles, and gloves.
• Ensure ladders or lifts are stable and certified for use if accessing ceiling vents.
• Use only approved tools — no sharp or abrasive instruments that can damage ductwork.

⚠️ Note: Do not attempt internal duct cleaning unless trained or certified for HVAC maintenance. Focus on vent covers, diffusers, and accessible sections only.

Step-by-Step Cleaning Process

1. Initial Inspection
   • Identify air returns and supply vents; note signs of dust, mold, or restricted airflow.
   • Check filters and replace if visibly soiled.
2. Surface Cleaning
   • Remove vent covers and diffusers carefully.
   • Wash covers with mild detergent and warm water; allow to dry completely.
   • Vacuum visible duct openings using a HEPA-filter vacuum with soft brush attachments.
3. Internal Maintenance
   • Wipe reachable duct surfaces with a damp microfiber cloth.
   • For deeper cleaning, coordinate with a certified HVAC technician.
   • Avoid liquid cleaners inside ducts — moisture can promote mold growth.
4. Post-Cleaning Steps
   • Replace filters (HEPA or MERV-rated) as specified by manufacturer.
   • Reinstall vent covers securely.
   • Wipe surrounding ceiling or wall areas to remove residual dust.

When It Applies

Perform ventilation cleaning:

• Quarterly in high-dust or industrial environments.
• Biannually in offices, schools, and residential buildings.
• After renovation or construction projects.
• Following mold remediation or pest control procedures.

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