Mechanical BIM services

Fit Every Duct and Pipe Before You Pay to Install It

Mechanical systems clash more than any trade, and each site clash means cut ducts and idle crews. We coordinate it in the model, so crews install once.

See What Field Rework Costs You
  • Clash-free before installCoordinated with every trade.
  • Fabrication-ready modelsDuct and pipe from the model.
  • Every system fitsRouting planned in 3D.
  • Checked before releaseSenior review on every set.
  • Spiral and rectangular ductwork with diffusers under a steel roof structureExposed HVAC distribution
  • Coordinated HVAC ductwork running below a steel roof structureHVAC coordination
  • Air handling unit and ductwork installed alongside fire protection pipingEquipment and fire protection
  • Fabricated rectangular and spiral ductwork installed below a concrete slabFabricated ductwork
  • 20+Years’ experience
  • 1,500+Projects supported
  • 350+Engineering professionals
  • 80%Repeat clients

Where margin leaks

Most Field Rework Starts in the Ceiling

Ducts and pipes compete with structure for space. On site, each conflict means rework and change orders.

  • Field Clashes

    Where margin leaks
    Ducts and pipes hit beams, sprinklers and electrical, so crews cut, reroute and wait.
    What we fix
    Mechanical models coordinated with every trade, with clashes cleared before installation.

  • Fabrication Errors

    Where margin leaks
    Duct and pipe sections built from uncoordinated drawings arrive wrong and are made again.
    What we fix
    Fabrication-ready models and spool drawings that match the coordinated design.

  • Lost Ceiling Space

    Where margin leaks
    Systems that do not fit force lower ceilings, redesign or costly layout changes.
    What we fix
    Routing and elevations planned in 3D, so every system fits the space allowed.

  • Equipment Access Issues

    Where margin leaks
    Units installed without service clearance mean rework now and higher costs for the owner later.
    What we fix
    Equipment placed with access and maintenance zones checked in the model.
Exposed spiral ductwork coordinated below a metal deck roof

What we deliver

Mechanical Models Your Crews Can Install From

  • Mechanical BIM Models

    HVAC, ductwork, piping and equipment, LOD 100 to 500.

  • Clash Detection and Coordination

    Mechanical coordinated with structure, plumbing, fire protection and electrical.

  • Shop and Fabrication Drawings

    Duct and pipe drawings and spools built from the model.

  • Construction Drawings

    Plans, sections and details generated from the coordinated model.

  • Quantities and Take-offs

    Duct, pipe and equipment quantities that stay in sync.

  • As-Built Models

    A verified record of installed systems, for operations.

  • We work in
  • Autodesk Revit
  • Navisworks
  • AutoCAD MEP
  • Your templates and standards

Level of development

More Detail Now, Less Rework Later

At the wrong level of detail, HVAC problems surface on site, where every fix costs time and margin.

  1. Stage
  2. LOD 100Concept
  3. LOD 200Schematic Design
  4. LOD 300Detailed Design
  5. LOD 350/400Build-Ready
  6. LOD 500As-Built

Cost to change a decision

$

Low

$$

Moderate

$$$

High

$$$$

Very high

$$$$$

Highest

Confidence in the model

Indicative

Approximate

Coordinated

Build-ready

Verified

Decide early, while change is cheap. Build from a model you can trust.

  1. Mechanical model at LOD 100: simple duct massing
    LOD 100

    Concept

    Early Vision

    owners & developers

    Confirm HVAC feasibility before you commit to a design.

    What we model
    HVAC zones, major equipment footprints, shafts and service areas.
    What it protects
    Prevents oversized systems
  2. Mechanical model at LOD 200: approximate duct routing with joints
    LOD 200

    Schematic Design

    Early Design

    architects & MEP engineers

    Set a clear HVAC direction with realistic early cost estimates.

    What we model
    Approximate duct routing, preliminary equipment selection and early sizing.
    What it protects
    Resolves early coordination issues
  3. Mechanical model at LOD 300: accurately sized and coordinated ductwork
    LOD 300

    Detailed Design

    Accurate & Coordinated

    Where most margin is protected

    Typical for coordination

    MEP engineers & general contractors

    Coordinate ductwork and equipment before conflicts reach the site.

    What we model
    Accurate duct sizes, precise routing, equipment placement and access clearances.
    What it protects
    Fewer clashes, RFIs and site conflicts
  4. Mechanical model at LOD 350/400: ductwork with hangers and supports
    LOD 350/400

    Build-Ready

    Fabrication Precision

    mechanical contractors & fabricators

    Fabricate and install ductwork with field-ready certainty.

    What we model
    Hangers, supports, insulation, sleeves, vibration control and prefab-ready ductwork.
    What it protects
    Minimal site rework, faster approvals
  5. Mechanical model at LOD 500: as-built ductwork with confirmed supports
    LOD 500

    As-Built

    Verified Digital Twin

    owners & facility managers

    Operate and renovate on a verified record of installed HVAC.

    What we model
    Confirmed routing, equipment data, capacities, tags and field modifications.
    What it protects
    Predictable renovations, better energy use

Not sure which LOD your program needs?

A senior engineer will tell you, and what each choice costs, in your Margin Assessment.

How it works

From Design to Installation

Ducts, pipes and equipment are coordinated before crews install.

  1. 01

    Share Your Documents

    Send drawings, models and specs. We confirm scope, deliverables and dates in writing.

  2. 02

    Model and Coordinate

    HVAC and piping are routed with structure and every trade, with clash detection by zone.

  3. 03

    Check and Release

    Senior review to ASHRAE, SMACNA, IMC, AS 1668 and AS 4254 before models are released.

  4. 04

    Support Through Install

    Fast RFI answers and model updates through installation, so crews avoid field rework.

How Much Margin Is Mechanical Rework Quietly Costing You?

A two-minute Margin Assessment shows where your programs leak, in dollars, and what installing once could save.

Request a Margin Assessment

Confidential. No commitment.

What clients ask first

Mechanical BIM: Common Questions

Straight answers from our engineering team. If your question isn’t here, ask us directly.

Ask a senior engineer An engineer replies within one business day.
What does your mechanical BIM include?

3D models of HVAC ductwork, piping and equipment coordinated with every trade, with clash detection, shop drawings and as-built models, at LOD 100 to 500.

Which codes do you follow, and who is responsible for the design?

ASHRAE, SMACNA and the IMC for US projects; AS 1668 and AS 4254 for Australian projects. Design responsibility stays with your engineer of record, who reviews and seals the work. Bimgraphix does not stamp drawings; we answer for every sheet matching your design inputs, and any gap is raised as an RFI, never guessed.

How do you make sure the model is right?

The model is coordinated with structure, plumbing, fire and electrical in Navisworks, clashes are resolved with your team, and it is senior-reviewed before release.

How fast can you deliver, and how is it priced?

We quote per model or per floor and confirm the delivery schedule in writing before work begins, so dates and costs are known on day one. Work is released floor by floor or by zone, so your team can start early. You can begin with one floor and judge the quality before committing the full program.

Is our project information kept confidential?

Yes. We work under your NDA from the first file. Everything we produce, including models and drawings, belongs to you, is shared only through Autodesk Construction Cloud, Procore or a secure link, and is seen only by the team assigned to your project.

Start a conversation

Built for Programs Where Precision Is Never Optional.

For over 20 years, one standard has guided every model, drawing and component. Let’s talk about where your programs are losing margin.

Start Your Margin Assessment

Or write to info@bimgraphix.com

  • Response within one business day
  • Reviewed by a senior engineer
  • Confidential