Project
Mechanical Services Design & Construct (Greenfield / New Build)
Key Challenges
- Required compliance with advanced indoor environment and wellness standards
- Thermal comfort and Legionella risk management in a 30-storey commercial tower
- Coordination within tight CBD construction logistics and vertical access constraints
Outcomes
Delivered 30-storey mechanical design & construct on time and budget
Enhanced occupant wellness with advanced air quality & thermal comfort
Won long-term maintenance partnership through successful delivery
The Client
Multiplex Constructions Pty Ltd is a globally renowned construction firm, backed by Brookfield Asset Management. Established in 1962, Multiplex has completed over 1,140 major projects worldwide, delivering more than US $120 billion in construction value. Their impressive Australian portfolio includes iconic developments such as Perth Stadium, Brookfield Place, and Fiona Stanley Hospital.
The Chevron Headquarters project marked another high-profile commercial initiative in Perth, and Multiplex’s selection of Envar Engineers and Contractors as a mechanical services partner reflected the strong trust and capability required to execute complex, wellness-aligned engineering within a landmark urban development.
What we achieved with our customer
The Chevron Headquarters project involved full mechanical services design and construction for a 30-storey commercial tower in Perth’s CBD. Envar Engineers and Contractors were engaged under a D&C subcontract by Multiplex to deliver the base-building HVAC infrastructure, including a central energy plant, riser systems, and ducted air terminal units throughout the building.
A standout innovation was the use of a custom-designed mast climber system inside the mechanical risers. This replaced traditional scaffolding approaches and allowed teams and materials to be safely transported vertically within the tower, improving both efficiency and safety outcomes. The mast climber handled payloads up to 4,500 kg per lift and operated in full compliance with Australian mast safety standards.
The system significantly accelerated installation timelines, reduced dependency on tower crane scheduling, and improved worker access across multiple service floors. This engineering solution not only enhanced logistical flow within the risers but also contributed to improved worksite safety.
The final system was delivered on time and within budget, meeting the strict air quality, Legionella prevention, and thermal comfort requirements outlined by both AS 1668.2 and WELL-aligned indoor environment goals. Envar’s performance secured subsequent work on the full fitout and ongoing building services maintenance.
