Product Overview

Summary: This comprehensive procedure sets out the safe and compliant method for installing air conditioning ductwork on Australian construction and fit‑out sites. It integrates WHS requirements with industry best practice to control risks from working at height, manual handling, sharp edges and confined ceiling spaces, while delivering consistent, high‑quality installations.

Air conditioning ductwork installation involves a combination of working at height, overhead manual handling, sharp metal components, power tools and often congested ceiling spaces shared with other trades. Without a clear, documented procedure, businesses face increased risk of falls, crush injuries, lacerations, musculoskeletal disorders, service clashes and costly rework. This Safe Operating Procedure provides a structured, step‑by‑step method for planning, installing and verifying ductwork systems safely and efficiently in line with Australian WHS legislation and mechanical services standards.

The document guides your teams through pre‑start planning, coordination with other trades, material handling, safe access arrangements, installation sequencing, sealing and insulation, and final inspection. It embeds risk controls such as safe work at height, correct lifting techniques, lock‑out of nearby services, and mandatory PPE, while also addressing quality issues like airtightness, support spacing, and compliance with design specifications. By implementing this SOP, businesses can demonstrate due diligence, lift installation quality, reduce incident rates and streamline onboarding for new workers across commercial, industrial and residential projects.

Key Benefits

• Ensure compliance with Australian WHS laws and mechanical services standards for ductwork installation.
• Reduce the risk of falls, crush injuries, lacerations and musculoskeletal disorders during installation activities.
• Standardise installation quality across crews, minimising rework, air leakage and commissioning delays.
• Streamline induction and competency assessment for new installers and apprentices.
• Improve coordination with other trades, reducing clashes, access issues and site disruption.

Who is this for?

• HVAC Installers
• Mechanical Plumbers
• Sheet Metal Workers
• Site Supervisors
• HVAC Project Managers
• WHS Advisors and Safety Officers
• Construction Managers
• Apprentice HVAC Technicians
• Facilities and Maintenance Managers

Hazards Addressed

• Falls from ladders, mobile scaffolds and elevated work platforms during overhead installation
• Musculoskeletal injuries from lifting, carrying and positioning heavy or awkward duct sections
• Lacerations and puncture wounds from sharp sheet metal edges and fixings
• Struck‑by and crush injuries from falling ductwork or dropped tools and materials
• Trips and slips due to poor housekeeping, offcuts and packaging in work areas
• Exposure to dust, insulation fibres and sealants in poorly ventilated ceiling spaces
• Electric shock or service strikes when working near existing electrical and building services
• Heat stress and fatigue when installing ductwork in roof spaces or hot environments

Included Sections

• 1.0 Purpose and Scope
• 2.0 References, Standards and Definitions
• 3.0 Roles and Responsibilities
• 4.0 Required Licences, Competencies and Training
• 5.0 Tools, Equipment and Materials
• 6.0 Personal Protective Equipment (PPE) Requirements
• 7.0 Hazard Identification and Risk Controls
• 8.0 Pre‑Start Planning and Site Assessment
• 9.0 Manual Handling and Material Storage Requirements
• 10.0 Access Equipment Setup (Ladders, Mobile Scaffolds, EWPs)
• 11.0 Ductwork Installation Procedure – Rigid Duct
• 12.0 Ductwork Installation Procedure – Flexible Duct
• 13.0 Supports, Hangers and Seismic Bracing Requirements
• 14.0 Sealing, Insulation and Vapour Barrier Application
• 15.0 Working Near Existing Services and Live Installations
• 16.0 Housekeeping and Waste Management
• 17.0 Quality Checks, Testing and Commissioning Readiness
• 18.0 Incident Reporting and Non‑Conformance Management
• 19.0 Emergency Procedures (Falls, Cuts, Electric Shock)
• 20.0 Review, Audit and Continuous Improvement

Legislation & References

• Work Health and Safety Act 2011 (Cth) and corresponding state and territory WHS Acts and Regulations
• Safe Work Australia – Model Code of Practice: Construction Work
• Safe Work Australia – Model Code of Practice: Managing the Risk of Falls at Workplaces
• AS 4254.1: Ductwork for air-handling systems in buildings – Flexible duct
• AS 4254.2: Ductwork for air-handling systems in buildings – Rigid duct
• AS 1668.1: The use of ventilation and air conditioning in buildings – Fire and smoke control
• AS 1668.2: The use of ventilation and air conditioning in buildings – Ventilation design for indoor air contaminant control
• AS/NZS 4801: Occupational health and safety management systems (superseded but still commonly referenced)
• AS 1891 series: Industrial fall-arrest systems and devices
• Manufacturer installation instructions for duct, hangers, sealants and insulation products