HVAC Drafting Services Australia

CAD documentation for HVAC systems — ductwork layouts, MEP coordination, as-builts and compliance drawings

ASTCAD provides HVAC CAD drafting services for mechanical engineers, builders, contractors, and building designers across Australia. We produce the technical CAD documentation that HVAC designers and installers need — ductwork layout drawings, MEP coordination drawings, equipment schedules, load calculation documentation, and as-built drawings — to the standards required by Australian building authorities and the National Construction Code.

Note: ASTCAD is a CAD design and drafting company, not an HVAC installation or trade services provider. We produce the engineering drawings for HVAC systems; the physical installation is carried out by licensed mechanical services contractors. If you need CAD documentation for an HVAC project — from design layout drawings through to as-built documentation — we can help.

HVAC CAD Drafting Services We Offer

Ductwork Layout and Design Drawings

ASTCAD produces ductwork layout drawings for commercial and industrial HVAC systems, including duct sizing calculations, branch routing, damper and grille locations, and coordination with structural and architectural drawings. We use AutoCAD MEP and Revit MEP for coordinated ductwork modelling. For multi-storey commercial buildings, we produce coordinated MEP models that flag clashes with structural beams, fire services, and hydraulics before construction begins.

Supply and return air duct layouts — sized to ASHRAE 2021 Handbook or AS 1668 series
Exhaust and fresh air system drawings for NCC Section F compliance
Commercial kitchen exhaust hood and makeup air documentation
Smoke management ductwork drawings for high-rise buildings (NCC Part E2)
Ductwork shop drawings for sheet metal fabricators

MEP Coordination and Clash Detection

HVAC coordination is one of the most demanding MEP drafting tasks — ductwork, pipe work, electrical trays and structural elements all compete for ceiling void space. ASTCAD coordinates HVAC drawings against architectural, structural, hydraulic, electrical and fire services drawings to identify clashes before they become costly on-site variations. We work in Revit BIM, AutoCAD MEP, and Navisworks for clash detection and issue resolution.

Equipment Layout and Schedules

AHU, FCU, split system, chiller and boiler plant room layout drawings
Equipment schedules (model, capacity, electrical supply, connections)
Mechanical equipment room drawings with maintenance access clearances to AS 1210 and manufacturer requirements
Roof plant layout drawings showing structural penetrations and support frames

Australian Standards and NCC Compliance Documentation

HVAC documentation for building approvals in Australia must comply with the National Construction Code (NCC) 2022, specifically Volume One Section F (Condensation Management), Section J (Energy Efficiency), and Part E2 (Smoke Hazard Management). Our drafting team produces the following compliance documentation:

AS 1668.1 — Mechanical ventilation for acceptable indoor air quality: ductwork drawings demonstrating minimum outdoor air flow rates per occupancy type
AS 1668.2 — Ventilation design for indoor air contaminant control: commercial kitchen and carpark exhaust documentation
AS/NZS 3666 series — Air handling and water systems for buildings: microbial control (Legionella): documentation packages for cooling towers and AHUs
NCC Section J — Energy efficiency: duct insulation R-value schedules, system efficiency calculations, and HVAC system descriptions for NatHERS or JV3 assessments
QFES / fire engineering — Smoke management system drawings and smoke detection layouts for high-rise and atrium buildings

As-Built HVAC Drawings

After construction, ASTCAD converts site mark-ups into final as-built HVAC drawings for building owner handover, authority submissions, and future facility management. We accept redline PDFs, site photographs, or RFI logs and produce accurate AutoCAD DWG or Revit RVT as-built sets compliant with AS 1100.101 drawing standards.

Industries and Project Types

Commercial office buildings — VAV and fan coil HVAC systems, NCC Section J documentation
Healthcare facilities — Infection control ventilation drawings, pressure differential documentation, AS 1668 and NHS (Australia) Infection Control guidance compliance
Industrial facilities — Process ventilation, dust extraction, and fume extraction ductwork drawings to AS/NZS 4024 (machinery safety)
Data centres — Precision air conditioning layout drawings, hot aisle/cold aisle containment documentation
Residential multi-storey — Ducted system and split system coordination drawings, NCC Section F condensation management documentation

Frequently Asked Questions — HVAC Drafting

What does ASTCAD provide for HVAC projects?

ASTCAD provides the CAD documentation for HVAC systems — ductwork layout drawings, MEP coordination drawings, equipment schedules, compliance documentation, and as-built drawings. We are a CAD drafting company, not a trades or installation contractor. We work directly for mechanical services engineers, builders, and building designers who need accurate, code-compliant HVAC CAD documentation produced quickly and to Australian Standards.

What software do you use for HVAC drafting?

We use AutoCAD MEP, Revit MEP, and MicroStation for HVAC layout drawings and 3D MEP modelling. For clash detection on BIM projects, we use Navisworks Manage. For load calculation documentation and psychrometric analysis, we accept inputs from Carrier HAP, IES Virtual Environment, or EnergyPlus outputs and incorporate them into the drawing package. All drawings are delivered in both PDF (ISO A1/A3 format) and DWG/RVT for client use.

What Australian Standards apply to HVAC drawings?

The main Australian Standards relevant to HVAC documentation are AS 1668.1 (mechanical ventilation for acceptable IAQ), AS 1668.2 (ventilation for indoor air contaminant control), AS/NZS 3666 series (air handling and water systems — Legionella control), AS 4254 (ductwork for air handling systems), and the NCC 2022 Section J energy efficiency provisions. For commercial kitchen exhaust, AS/NZS 1668.2 and AIRAH DA19 apply. Our drafting team is familiar with all of these standards and can produce documentation packages for building approval and authority submissions.

Can you coordinate HVAC drawings with structural, electrical, and hydraulics?

Yes. MEP coordination is a core ASTCAD capability. We combine HVAC ductwork models with structural steel models, electrical cable tray layouts, hydraulic pipe work, and fire services drawings in Revit or Navisworks to identify clashes. We produce clash reports, coordinate with each discipline’s engineer to resolve conflicts, and update the models before construction begins — avoiding costly on-site variations.