Laboratories are unlike any other commercial build. A single wet-lab floor can demand more airflow than an entire office tower, run eight different gas reticulations, sit on a pressure hierarchy that cannot fail, and still squeeze into a Class 9a or Class 8 building envelope. Whether the end-user is a university research group, a medical diagnostic operator, a forensic facility or a contract testing house, laboratory MEP design in Australia is a discipline in its own right — and it lives or dies on coordinated BIM.
This guide walks through how Meter Built approaches laboratory MEP drafting and BIM coordination, the containment and ventilation rules that shape every decision, and the Australian compliance touchpoints that catch unwary design teams.
Why laboratory MEP is its own discipline
Typical commercial MEP coordination revolves around comfort cooling, general power, hydraulic risers and sprinkler coverage. Laboratory MEP flips almost every one of those assumptions:
- Ventilation is process-driven, not comfort-driven. Once-through air, high change rates and directional airflow dominate the mechanical design.
- Electrical is split into clean and dirty supplies. Sensitive analytical equipment needs isolated, filtered circuits with UPS backing.
- Hydraulics include process fluids. Reverse-osmosis water, lab-grade RO/DI, acid-waste drainage and dilution pits sit alongside normal cold and hot water.
- Containment and pressure hierarchies must be preserved under every failure mode.
That means every discipline model in the federation has tighter tolerances and more interdependencies than a standard commercial project. The same BIM coordination principles we cover in our MEP BIM drafting services still apply — but clash cycles run tighter, LOD progresses earlier, and the consequences of a missed coordination issue are far greater.
Containment levels: PC1, PC2, PC3 and PC4
Australian and New Zealand laboratories are classified by Physical Containment (PC) level under AS/NZS 2243.3 — “Safety in laboratories: Microbiological safety and containment”. The PC rating drives almost every MEP decision downstream.
PC1 — basic teaching and low-risk lab
General mechanical ventilation is typically sufficient. No directional airflow requirement. Standard AS1668.2 outdoor-air rates with a slight negative offset to adjoining corridors.
PC2 — the most common Australian research lab
Applies to the majority of university and hospital research spaces working with Risk Group 2 agents. Requires directional airflow into the lab, dedicated exhaust for biosafety cabinets and fume cupboards, and a clearly documented pressure cascade. PC2 is where laboratory MEP drafting starts to diverge sharply from generic commercial work.
PC3 — high-containment research
Dedicated air-handling plant, HEPA-filtered exhaust, sealed building envelope, interlocked airlocks, autoclave pass-throughs and redundant fans on emergency power. MEP models must coordinate down to the sealant detail around every penetration.
PC4 — maximum containment
Rare in Australia (only a handful of facilities). Full suit labs, bubble-tight dampers, effluent decontamination systems and double-HEPA exhaust. Not a project type we see monthly, but the same BIM federation principles scale.
Ventilation and pressure cascades
Laboratory ventilation design starts with the pressure hierarchy — the lab is always “more negative” than the corridor, which is more negative than the public entry. Every door swing, every leakage path and every MEP penetration has to preserve that cascade.
Fume cupboards, biosafety cabinets and once-through air
Fume cupboards (typically 0.5 m/s face velocity to AS/NZS 2243.8) exhaust directly to atmosphere via dedicated risers. Biosafety cabinets — Class I, Class II (A2 or B2) and Class III — have different exhaust interfaces. Class II B2 and Class III require hard ducting to external exhaust and no recirculation, which immediately drives up plant-room area and riser coordination in Revit.
Pressure hierarchies between clean, dirty and corridor zones
A typical PC2 wet lab might sit at −15 Pa relative to the corridor, with autoclave and wash-up areas at −25 Pa. The MEP model needs supply, general exhaust and fume exhaust tracked independently so the energy-model team can confirm airflow balance per zone. We use colour-coded Revit view filters and airflow schedules tied directly to the system classifications, which our HVAC and mechanical drafting services team maintains across every lab model we deliver.
Lab gases and high-purity water services
Australian research labs commonly reticulate:
- Medical / laboratory-grade compressed air
- Nitrogen (often boil-off from dewars)
- Argon, helium and CO2
- Vacuum
- Natural gas or LPG to burners
Gas reticulation is drafted in the hydraulic and process-services model, colour-coded per AS 1345 and AS 4332 where applicable. RO/DI water loops need recirculation to prevent stagnation, and acid-waste drainage needs dilution pits sized to the laboratory’s likely pH load. For medical research labs co-located with hospital infrastructure, the coordination overlaps heavily with the approach outlined in our guide to MEP drafting for healthcare facilities in Australia.
Electrical — UPS, emergency power and EMI-sensitive loads
A research lab’s electrical schedule is almost always split into three logical supplies:
- Normal power — lighting, GPOs, general services.
- Essential / emergency power — life-safety, smoke control, freezers, biosafety cabinets, PC3 air-handling fans.
- UPS / clean power — mass spectrometers, NMRs, confocal microscopes, sequencers.
Isolation transformers, dedicated earthing and EMI-shielded conduit runs for sensitive instruments all have to be drawn and clash-checked early. Missing a dedicated UPS riser at LOD 300 routinely costs projects six figures when it’s picked up in shop-drawing review.
BIM deliverables for a laboratory project
A fully coordinated laboratory MEP BIM package from Meter Built typically includes:
- Federated Revit model at LOD 300 for tender, progressing to LOD 400 for shop fabrication
- Airflow and pressure-cascade schedules per room
- Containment zoning diagrams (PC2/PC3 boundaries clearly called out)
- Gas schematics with outlet schedules
- UPS and essential-power single-line diagrams
- Clash reports from Navisworks with BCF issue tracking
- Commissioning data sheets tagged to model elements
Australian compliance touchpoints
Laboratory projects in Australia sit at the intersection of several regulatory frameworks. The key Australian standards and code interactions are:
- NCC Volume One — Class 8 (laboratory/production) or Class 9a (health-care when the lab is part of a hospital diagnostic unit)
- AS1668.1 / AS1668.2 — mechanical ventilation and fire mode
- AS/NZS 2243 series — microbiological safety, fume cupboards, chemical storage
- AS/NZS 3000 — electrical wiring rules for the clean and dirty supplies
- AS/NZS 3500 — hydraulic services where potable and sanitary plumbing apply
- AS 2982 — laboratory construction
We publish a broader summary of how these interact in our MEP compliance guide to the NCC and Australian standards, which is a useful starting point before you brief a laboratory design team.
How Meter Built delivers laboratory MEP BIM
Meter Built works with architects, lab planners and head contractors across Australia on research, medical diagnostic and contract testing facilities. We bring the containment logic, gas reticulation detail, pressure-cascade discipline and UPS coordination into a single federated Revit model, managed through Navisworks clash cycles and BCF issue tracking. Whether you’re fitting out a PC2 teaching lab in a regional TAFE or coordinating a new PC3 wing for a hospital research institute, the same BIM rigour applies — and the earlier it starts, the cheaper the project runs.
Ready to brief a laboratory MEP project? Talk to our drafting team about a fixed-scope model and we’ll bring a lab-specific BIM execution plan to the first workshop.