Product Overview

Summary: This HVAC System Cleaning Safe Operating Procedure sets out a clear, step‑by‑step method for safely inspecting, cleaning and maintaining heating, ventilation and air conditioning systems. It helps Australian workplaces control airborne contaminants, manage confined and elevated work risks, and demonstrate due diligence under WHS legislation while improving indoor air quality and system performance.

HVAC systems are critical to indoor air quality, energy efficiency and occupant comfort, but poorly maintained systems can quickly become a source of dust, mould, bacteria and other airborne contaminants. Cleaning ductwork, coils, filters and associated components often involves working at height, in ceiling spaces, plant rooms and other restricted areas where electrical, manual handling and biological hazards are present. This HVAC System Cleaning SOP provides a structured, WHS‑aligned process that guides workers through planning, isolating, cleaning and reinstating HVAC systems in a safe and consistent way.

Developed for Australian workplaces, the procedure goes beyond basic housekeeping to embed risk management, permit requirements and documentation into everyday maintenance tasks. It supports PCBU obligations by defining roles and responsibilities, specifying PPE, detailing safe work methods for common HVAC cleaning activities, and outlining how to manage hazardous residues such as mould, bird droppings and accumulated dust. By implementing this SOP, organisations can reduce the risk of illness and injury, extend the life of their HVAC assets, and provide a defensible framework that stands up to internal audits and external regulatory scrutiny.

This document is suitable for a wide range of environments, from office towers and retail centres through to hospitals, aged care facilities, schools, industrial plants and government buildings. It standardises how contractors and in‑house teams approach HVAC cleaning, ensuring that every job—from a simple filter change to a full duct clean—is carried out methodically, safely and in line with current Australian best practice.

Key Benefits

• Ensure HVAC cleaning activities are carried out in line with Australian WHS legislation and recognised industry standards.
• Reduce worker exposure to dust, mould, biological contaminants and cleaning chemicals during HVAC maintenance.
• Standardise HVAC cleaning methods across contractors and in‑house teams to improve consistency and auditability.
• Minimise the risk of falls, electric shock and other common maintenance incidents in plant rooms and ceiling spaces.
• Improve indoor air quality and system reliability, reducing complaints, downtime and unplanned call‑outs.

Who is this for?

• HVAC Technicians
• Maintenance Supervisors
• Facilities Managers
• Property Managers
• WHS Managers
• Operations Managers
• Building Services Contractors
• Hospital and Aged Care Engineering Managers
• School and University Facilities Coordinators
• Commercial Cleaning Supervisors

Hazards Addressed

• Exposure to airborne dust, mould spores and biological contaminants within ducts and air handling units
• Contact with cleaning chemicals, sanitisers and coil cleaners that may cause skin or respiratory irritation
• Electric shock from live HVAC components and associated electrical equipment
• Falls from ladders, elevated work platforms and work at height in ceiling spaces or plant platforms
• Slips, trips and falls due to tools, access panels and hoses obstructing walkways
• Manual handling injuries from lifting filters, fan components, access panels and duct sections
• Working in confined or poorly ventilated spaces such as ceiling cavities and plant rooms
• Noise exposure from operating fans, vacuum equipment and power tools
• Inhalation of accumulated contaminants such as bird droppings or rodent droppings during system access
• Cuts and abrasions from sharp metal edges on ductwork, grilles and plant casings

Included Sections

• 1.0 Purpose and Scope
• 2.0 References, Definitions and Abbreviations
• 3.0 Roles, Responsibilities and Competency Requirements
• 4.0 Pre-Task Planning and Risk Assessment
• 5.0 Required Tools, Equipment and PPE
• 6.0 HVAC System Isolation, Lockout and Verification
• 7.0 Access, Work at Height and Confined Space Considerations
• 8.0 Step-by-Step HVAC Cleaning Procedure (Filters, Coils, Ducts, Grilles and AHUs)
• 9.0 Management of Contaminants, Waste Collection and Disposal
• 10.0 Hygiene, Decontamination and Infection Control Measures
• 11.0 Emergency Procedures and Incident Response
• 12.0 Post-Cleaning Inspection, Testing and System Reinstatement
• 13.0 Documentation, Records and Reporting Requirements
• 14.0 Training, Induction and Competency Verification
• 15.0 Review, Audit and Continuous Improvement

Legislation & References

• Work Health and Safety Act 2011 (Cth) and mirror WHS Acts in relevant states and territories
• Work Health and Safety Regulations 2011
• Safe Work Australia – How to Manage Work Health and Safety Risks: Code of Practice
• Safe Work Australia – Managing the Work Environment and Facilities: Code of Practice
• Safe Work Australia – Hazardous Manual Tasks: Code of Practice
• Safe Work Australia – Confined Spaces: Code of Practice
• AS 1668.2: The use of ventilation and airconditioning 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
• AS/NZS 1715: Selection, use and maintenance of respiratory protective equipment
• AS/NZS 1891 series: Industrial fall-arrest systems and devices