Product Overview

Summary: This Ventilation System Cleaning Safe Operating Procedure sets out a clear, safe and compliant method for inspecting, cleaning and maintaining HVAC and mechanical ventilation systems. It helps Australian workplaces control airborne contaminants, improve indoor air quality, and meet WHS expectations for healthy, well‑ventilated environments.

Clean, well-maintained ventilation systems are critical to controlling airborne contaminants, odours and temperature in Australian workplaces. When ducts, filters, coils and fans are neglected, dust, mould, microorganisms and other pollutants can circulate throughout a building, contributing to respiratory issues, complaints about indoor air quality, and potential breaches of WHS duties. This Ventilation System Cleaning Safe Operating Procedure provides a structured, repeatable method for planning, carrying out and documenting cleaning activities so that building owners and PCBUs can demonstrate a proactive approach to air quality and worker health.

The SOP breaks down the entire process into practical stages: pre-clean inspection, risk assessment, isolation and lock-out of plant, selection of appropriate cleaning methods, safe access to ducts and plant rooms, waste collection and disposal, and post-clean verification. It addresses common challenges such as working in confined or restricted spaces, managing biological contamination, preventing cross-contamination into occupied areas, and coordinating with building occupants to minimise disruption. By implementing this procedure, organisations can support compliance with Australian WHS legislation, extend equipment life, reduce breakdowns, and provide a safer and more comfortable environment for workers, customers and visitors.

This document is particularly valuable for multi-site organisations and property portfolios that rely on contractors for HVAC maintenance. It establishes consistent expectations, documentation standards and safety controls regardless of who performs the work. Clear responsibilities, checklists and record-keeping templates help streamline audits, tender specifications and contractor oversight, reducing risk to both people and business operations.

Key Benefits

• Improve indoor air quality by systematically removing dust, mould and other airborne contaminants from ventilation systems.
• Ensure compliance with WHS obligations by embedding risk assessment, isolation and safe work practices into every cleaning task.
• Reduce unplanned downtime and maintenance costs by extending the life and efficiency of fans, coils, filters and ductwork.
• Standardise contractor and in-house maintenance practices across sites with clear, step-by-step cleaning and verification procedures.
• Support defensible WHS and facilities management records through structured checklists, inspection forms and cleaning reports.

Who is this for?

• Facilities Managers
• Maintenance Supervisors
• HVAC Technicians
• WHS Managers
• Property Managers
• Building Services Coordinators
• Hospital Engineering Managers
• Aged Care Facility Managers
• School and University Maintenance Managers
• Cleaning and Hygiene Services Providers

Hazards Addressed

• Exposure to airborne dust, mould spores and biological contaminants during cleaning activities
• Exposure to chemical cleaning agents and disinfectants
• Electrical hazards from working on or near powered HVAC equipment
• Falls from ladders, platforms or elevated work areas while accessing ducts and plant
• Confined space or restricted space risks when entering ductwork or plant rooms with limited access or ventilation
• Manual handling injuries from lifting and moving filters, panels, access doors and equipment
• Slip, trip and fall hazards from hoses, tools and dislodged debris in plant rooms and access areas
• Noise exposure from operating fans, vacuums and mechanical cleaning equipment
• Cross-contamination of occupied areas with dislodged dust and debris during cleaning

Included Sections

• 1.0 Purpose and Scope
• 2.0 References, Definitions and Abbreviations
• 3.0 Roles, Responsibilities and Competency Requirements
• 4.0 Equipment, Tools, Chemicals and Personal Protective Equipment (PPE)
• 5.0 Pre-Start Requirements and Documentation
• 6.0 Risk Assessment, Hazard Identification and Control Measures
• 7.0 Isolation, Lock-Out/Tag-Out and System Shutdown
• 8.0 Access to Plant Rooms, Ceiling Spaces and Ductwork
• 9.0 Ventilation System Inspection and Condition Assessment
• 10.0 Filter, Coil, Fan and Duct Cleaning Procedures
• 11.0 Management of Dust, Debris, Waste and Contaminated Materials
• 12.0 Controls for Biological Contamination and Mould Remediation
• 13.0 Working at Heights and Confined/Restricted Space Considerations
• 14.0 Recommissioning, System Restart and Operational Checks
• 15.0 Post-Clean Verification, Photos and Reporting Requirements
• 16.0 Housekeeping, Site Handover and Occupant Communication
• 17.0 Record Keeping, Maintenance Scheduling and Review
• 18.0 Emergency Procedures and Incident Response
• 19.0 Continuous Improvement and Review of this SOP

Legislation & References

• Work Health and Safety Act 2011 (Cth) and equivalent state and territory WHS Acts
• Work Health and Safety Regulations 2011 (Cth) and equivalent state and territory WHS Regulations
• Safe Work Australia – Managing the Work Environment and Facilities Code of Practice
• Safe Work Australia – How to Manage Work Health and Safety Risks Code of Practice
• AS 1668.1: The use of ventilation and air conditioning in buildings – Fire and smoke control in buildings
• AS 1668.2: The use of ventilation and air conditioning in buildings – Mechanical ventilation in buildings
• AS/NZS 3666.2: Air-handling and water systems of buildings – Microbial control – Operation and maintenance
• AS/NZS 3666.4: Air-handling and water systems of buildings – Microbial control – Performance-based maintenance of cooling water systems
• National Construction Code (NCC) – Performance requirements for ventilation and mechanical services