Modern construction is under more pressure than ever. Buildings are getting smaller, tighter, more costly, and faster to deliver. Compliance requirements are multiplying. Margins are thinning. And yet the expectation — from clients, developers, and certifiers alike — is that every project will perform better than the last.
In this environment, the default playbook of designing to code minimums and hoping for the best is no longer good enough. A growing number of project managers and builders are turning to something different: specialist studies.
SPESH, a new eBook by Rob Lord of SEED Engineers, explains what specialist studies are, how they work, and why they represent one of the most underutilised tools available to construction teams today. Here’s what’s inside.
What is a specialist study?
A specialist study is any sophisticated engineering technique applied to solve a specific project problem. The problem might be cost-related, technical, or compliance-driven — but the goal is always the same: to maintain or improve return on investment. Specialist studies are essentially performance-based “workarounds” that allow a project to meet its compliance obligations in a way that best suits its particular constraints and commercial objectives.
They sit at the intersection of engineering science and project management — and their value increases as those two disciplines drift apart on complex projects.
3 techniques to improve project ROI
Do more with less. Standard code rules are blunt instruments. They’re written for worst-case scenarios and apply uniformly regardless of site context, building configuration, or occupancy profile. By designing to first principles rather than conservative defaults, significant savings are available. Removing basement car park ductwork entirely through a CFD-validated ventilation configuration. Reducing hydraulic pipe diameters from 250mm to 150mm in height-constrained basements. Demonstrating that natural ventilation openings of 3% of floor area are compliant — rather than the default 5% rule — by modelling actual air quality performance. Each of these approaches reduces scope, simplifies coordination, and lowers cost without compromising compliance.
Do more with different. Many projects carry hidden inefficiencies in the way their systems are arranged. Hot water production plants sit next to systems that reject heat. Refrigerant selections are made conservatively rather than strategically. In one project documented in the eBook, simply switching refrigerant type reduced maximum demand sufficiently to eliminate an entire 1,000kVA substation — saving the developer hundreds of thousands of dollars. Shared energy systems, integrated thermal plant, and next-generation refrigerants are all opportunities to lift project value without increasing scope.
Reduce the builder’s work in conjunction. Riser space is not just floor area — it carries fire-rated construction requirements and penetration protection devices at every level. In a 55-storey project, reconfiguring the HVAC plant allowed two entire plant floors to be removed, lowering the building height, eliminating crane-airport coordination delays, and bringing income streams forward by months. The lesson: reducing the cost of building provisions for services is often worth more than reducing the cost of the services themselves.
3 common mistakes to avoid
Using a modelling shop with limited design experience. CFD and energy modelling are tools — not expertise. A modeller who doesn’t understand HVAC design may produce technically valid results that are commercially useless or actively harmful. The most effective outcomes come from what the eBook calls a “SUPER Modeler”: someone who understands both the modelling discipline and the design implications of the results. When those skills are split across two people, the result is typically slower, more costly, and less likely to identify the full commercial opportunity.
Failing to involve the certifier early. Most specialist studies involve a performance solution, which requires a certifier to accept the proposed compliance pathway. Not engaging the certifier at the outset is a common and costly mistake. Issuing a Performance Based Design Brief (PBDB) early in the process — before the full analysis is complete — alerts the certifier to what’s being proposed, builds trust, and gives the team an opportunity to identify and resolve complex issues before they become program risks.
Ignoring the site’s natural advantages. Every site has characteristics that a generic code-compliance approach will ignore. Wind direction, aspect, topography, and adjacent structures all influence how a building performs. A partially submerged car park in one project was facing a mechanical ventilation requirement of 37,230 LPS — until a specialist analysis of the site’s natural airflow patterns produced a compliant “assisted natural ventilation” scheme using four small fans instead. The savings for both builder and subcontractor were substantial.
3 insider secrets for restoring project performance
Effectiveness beats efficiency. The most common trap in building services design is optimising the wrong thing. Keeping car park airflow rates up to maintain dilution allows ductwork to be deleted entirely. Removing grease at source in kitchen ventilation avoids the need for fire-rated risers to the roof. Designing drainage to the actual usage profile — not the worst-case fixture loading — reduces pipe sizes significantly. In each case, focusing on what actually matters allows the rest to be simplified or eliminated.
Design for the profile, not just the worst case. The Affinity Laws — which apply to anything that flows, from air through fans to electricity through substations — show that halving flow speed reduces power consumption to one-eighth. A building that is sized exclusively for peak demand will operate inefficiently for the vast majority of its life. Designing for the full range of operating conditions, and pairing plant with appropriate storage, enables smaller grid connections, better lifecycle costs, and more resilient energy management.
Timing is everything. The earlier a specialist study is commissioned, the more value it can deliver. Not just because the cost of change is lower early in the design process — but because integrated design teams have time to realise the downstream benefits. A ventilation change that eliminates a plant room creates income-producing space. A refrigerant change that removes a transformer simplifies the electrical design. A ceiling height reduction prevents bulkheads across an entire residential development. These spin-off benefits only compound when there is time to act on them.
The bottom line
Specialist studies are not a niche luxury for unusually complex projects. They are a practical toolkit for any project manager or builder who wants to reduce cost, manage compliance risk, and improve the commercial outcome of a build. The question is not whether specialist input is worth engaging — it is when, and on what.
As the eBook puts it: get intentional about involving specialists not only when you find a problem, but before you start.