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BIM & CAD Files | HVAC Components | YONGFAN
3D Plant Room & Ceiling Spatial Coordination

BIM & CAD Files: Geometric & Service Envelope Coordination

BIM and CAD resources help project teams coordinate YONGFAN equipment in mechanical rooms, ceilings, ducts, pipe networks and building models after the product family and technical duty have been defined.

A 3D object can look clash-free in space while representing the wrong configuration. Motor access sides, discharge orientations, VAV reheat sections, U-tube bundle withdrawal zones, and plate heat exchanger opening clearances change physical envelopes. Coordinate digital models from approved technical confirmations.

Fan Geometry Discharge Angles · In-Line Flanges
VAV & Plenums YF-MOA Ceiling Matched Spigots
Service Envelopes U-Tube Pulling · PHE Opening
Formats Revit RFA · IFC · DWG · 3D STEP
Request a BIM / CAD File Review Category Geometry
BIM 3D mechanical model coordination for commercial HVAC plant room
Coordination Precedence System Duty → Model Selection → Approved Dimensions → BIM / CAD Clash Detection
01 / Digital Media Scope

Geometry Is Useful Only When It Represents the Selected Configuration

A PDF drawing, 2D CAD block, 3D mechanical model, and parametric BIM object serve different project workflows. Understand the role of each format in technical coordination.
Mechanical engineer checking HVAC piping and duct BIM coordination on construction site
Model Coordination vs Data Sheet

BIM Coordinates Space — It Does Not Size Equipment

A BIM fan object showing a 600 mm duct connection does not prove static pressure capability; a heat exchanger object does not prove thermal MW. Use data sheets for performance, CAD/BIM for spatial coordination.

1. PDF Technical Drawing

The primary controlled document for contract approval, submittal reviews, revision tracking, mounting dimensions, and nozzle schedules.

Role: Legally controlled dimensional approval

2. 2D CAD Layouts (DWG / DXF)

Essential for direct placement into mechanical floor plans, duct/pipe routing sections, ceiling coordination, and equipment foundation drawings.

Role: 2D mechanical engineering drafting

3. 3D Mechanical Models (STEP / SAT)

Defines physical envelopes, connection nozzle centerlines, base-frame footprints, and mechanical equipment collision checking in 3D space.

Role: 3D clash detection & plant room layout

4. Parametric BIM (Revit RFA / IFC)

Combines physical 3D geometry with engineering metadata: duct/pipe MEP connectors, electrical voltage, flow rates, and maintenance clearance volumes.

Role: Smart MEP building information modeling
02 / Discipline Geometry

Equipment-Specific BIM / CAD Coordination Rules

Detailed geometry and maintenance envelope requirements for fans, fan boxes, VAV plenums, filters, heat exchangers, hydronic booster skids, and control valves.
Discipline 01 · Fans & Fan Boxes Discharge Angles · Motor Access Side

Ventilation Fans (Axial, Mixed, Centrifugal, Roof, Jet) & Fan Boxes

Fan geometry varies dramatically across mounting architectures:

  • In-Line Axial & Mixed Flow (DTF, DTXF, SWF): Model casing diameter, flange hole circles, overall body length, motor junction box side, and airflow arrow.
  • Centrifugal & Cabinet Fans (4-72, SJG, DFS): Discharge angle (0°, 90°, 180°, 270°) and motor drive side are critical coordination parameters. An incorrect rotation angle makes the CAD block useless.
  • Roof Fans (DWT Series): Model roof curb opening, weather cowl overhang, and flashing base.
  • Tunnel Jet Fans (SDS / SDS-R): Model casing diameter, total length with silencers, mounting bracket centers, and dynamic reverse thrust airflow envelope.
  • DFX Purification Boxes: Multi-stage filter banks increase cabinet length and require dedicated side/bottom filter withdrawal access doors.
In-Line Fans
DTF, DTXF, SWF, CDZ casing flanges & motor side
Centrifugal Rotation
4-72 & SJG exact discharge angle & drive handedness
Roof Penetrations
DWT curb base, roof structural opening & cowl
Purification Boxes
DFX multi-module depth & filter withdrawal doors
View Centrifugal Fans Request Fan 3D CAD
3D CAD model of industrial centrifugal ventilation fan showing motor drive and discharge orientation
4-72 Centrifugal Discharge & Motor Coordination
Spatial Rule:

Never use a generic round cylinder to represent a centrifugal or cabinet fan. Always specify discharge orientation and motor access side.

Discipline 02 · VAV & Air Distribution Ceiling Matched Outlets · DDC Clearances

VAV Terminals (YFVAV-S-T100) & Plenums (YF-MOA)

Air distribution terminals sit at the congested intersection of ceiling structure, lighting, and piping:

  • YFVAV-S-T100 Single-Duct VAV: Model inlet collar (Ø125–Ø400 mm), casing length (1,000–1,100 mm for integrated units), actuator/DDC controller clearance, and optional hot-water reheat coil connections.
  • YF-MOA Multi-Outlet Plenum: Configured to order from the reflected ceiling plan. Model exact box dimensions, paired VAV terminal size, and outlet count, diameters, and lateral positions to match flexible duct runs to diffusers.
VAV Inlets
9 Round sizes: Ø125, 160, 200, 250, 315, 355, 400 mm
Integrated Options
Hot-water reheat coils, sound attenuator sections
YF-MOA Plenums
Custom outlet count & positions matching ceiling RCP
DDC Controller Access
Model 300 mm side clearance for actuator servicing
View VAV Terminals View Plenum Drawings
BIM model coordination of single duct VAV terminal and multi outlet distribution plenum in ceiling
YFVAV-S-T100 & YF-MOA Ceiling Coordination
Ceiling Coordination:

A generic 6-outlet plenum block is useless if your project requires 4 outlets on one side and 2 on the end. Provide ceiling RCP coordinates.

Discipline 03 · Heat Exchange & Hydronics Bundle Withdrawal · Skid Nozzle Centerlines

Heat Exchangers, Storage Vessels & Hydronic Booster Skids

Mechanical room 3D modeling eliminates costly on-site piping rework and blocked maintenance zones:

  • Gasketed Plate Heat Exchangers: Model fixed frame, port nozzles (DN15–DN250), movable compression frame, and the frame opening service zone required for plate inspection.
  • U-Tube Storage Heat Exchangers: Model vessel footprint, 4 nozzle connections, and the axial tube bundle withdrawal clearance (equal to vessel length). A vessel placed against a wall without pulling clearance is unmaintainable.
  • Packaged Hydronic Skids (JFDY, JFWP, JFHB, JFWZ): Model common base frame, circulation pumps, expansion tanks, valves, sensors, primary/secondary headers, and PLC control cabinet access doors.
  • Water Distributors & Collectors: Branch schedules, nozzle diameters, and center-to-center spacings must match the approved project P&ID.
PHE Plate Opening
Model frame extension space for plate pack cleaning
U-Tube Pulling Zone
Reserve full bundle withdrawal clearance along axis
Skid Footprint
JFDY / JFHB / JFWZ integrated base & pipe headers
Header Manifolds
Water Distributor & Collector custom branch schedules
View Storage Heat Exchangers Request Skid 3D Model
3D mechanical room model showing plate heat exchanger, pumps, expansion vessels, and valve connections
Plate Exchanger & Skid Maintenance Envelopes
Withdrawal Clearance Rule:

Never coordinate only the closed metal cylinder of a U-tube vessel. Always model the maintenance withdrawal zone to prevent civil wall conflicts.

Discipline 04 · Filtration & Valves Frame Modules · Actuator Height Envelopes

Air Filters, Cleanroom Terminals & Control Valves

Focus modeling on physical interfaces, connections, and service spaces rather than unnecessary internal micro-geometry:

  • Air Filters & Fixing Frames: Model fixing frames (610×610, 508×508, 305×610 mm with 20/45/65 mm inserts) and filter bank opening envelopes. Do not model individual filter pleats (creates heavy BIM file bloat).
  • Cleanroom Terminals (GFK, GCFK 150mm, FFU): Model ceiling grid footprint, duct spigot, room-side diffuser face, and electrical connection box.
  • Control & Hydraulic Valves: Model valve face-to-face body length, flange/thread size, actuator height envelope, cable entry, and pilot tubing clearances for 100X–900X hydraulic control valves.
Filter Frames
Standard 70 mm frame body; 20, 45, 65 mm insert depths
Cleanroom Units
GFK, GCFK (150 mm shallow), FFU autonomous ceiling grids
Valve Actuators
Model electric/thermal actuator height & wiring side
Hydraulic Pilots
Include pilot copper tubing envelope for 100X–900X
View Cleanroom Terminals View Control Valves
Cleanroom ceiling grid showing FFU and HEPA terminal housing BIM coordination
Cleanroom FFU & Terminal Spatial Grid
Actuator Height Warning:

An accurate DN size without actuator height geometry will cause clashes under low ceilings, near coil headers, or inside FCU enclosures.

03 / File Formats & LOD

File Format Availability & Level of Development (LOD)

Match the digital model format and Level of Development to the current project stage: conceptual space reservation, detailed clash coordination, or as-built submittal.
Project Workflow Stage Common Requested Format Key Geometry & Data Fields Included What to Confirm Before Requesting
Controlled Technical Submittal
 Controlled PDF Drawing General arrangement, full dimensions, nozzle schedule, revision code, notes Approved configuration drawing revision and project reference
2D Mechanical Plan Coordination
 DWG / DXF (2D CAD) Equipment outline, mounting holes, duct/pipe centerlines, rotation angle CAD layer conventions, unit scale (mm), and discharge orientation
3D Plant Room Clash Detection
 STEP / SAT / Parasolid Solid 3D envelope, connection ports, base frame, service clearance volumes Target software version and model origin/insertion point
Revit-Based MEP Modeling
 Revit Family (.RFA) MEP duct/pipe connectors, electrical load, airflow/kW, service space box Revit version year (e.g. 2022–2026) and connector shared parameters
Open BIM Coordination
 IFC (Industry Foundation Classes) 3D geometric solids, MEP connection interfaces, equipment classification Required IFC schema (IFC 2×3 or IFC 4) and property set expectations
04 / Request Protocol

How to Request a BIM / CAD File

Provide your project criteria and desired format to ensure our technical team issues the exact digital geometry matching your quoted hardware.
Engineering Handoff

10 Parameters for Accurate BIM/CAD Requests

Providing complete data ensures digital files reduce coordination risk rather than propagating outdated dimensions into building models.

1. Product Family & Proposed Model Code
2. Project Name, Reference & Country
3. Requested File Format (RFA, IFC, STEP, DWG)
4. Software & Version Year Requirement
5. Project Stage (Tender, Design, As-Built)
6. Mounting Orientation (Discharge / Handing)
7. Nozzle & Duct Connection Specifications
8. Ceiling RCP Diffuser Layout for YF-MOA
9. Service Clearance Envelope Inclusion
10. Approved Configuration Drawing Revision
05 / Technical Q&A

BIM & CAD Files Frequently Asked Questions

Direct engineering answers regarding Revit availability, generic blocks, service clearances, performance data in models, and custom geometry.

Does every YONGFAN product have a BIM file?

The current source documents confirm dimensioned technical drawings and configuration drawings for multiple families. Format availability (RFA, IFC, STEP) is confirmed for the exact model.

Are Revit (.RFA) and DWG files available?

Request the exact format and software version required by your project. YONGFAN application engineers will verify what native or neutral geometry exists for that configuration.

Can I use a generic fan block during early design?

Yes for preliminary space reservation, but replace it with selected-model geometry with verified discharge angle and motor position before freezing mechanical coordination.

Does a BIM model replace the approved product drawing?

No. The approved dimensioned PDF drawing remains the legally controlled source of truth for dimensions, tolerances, and submittal approvals.

Does a BIM object contain engineering performance data?

It includes key scheduled parameters (airflow, pressure, electrical kW, connections), but aerodynamic curves and thermal ratings must be verified from the Technical Data Sheet.

Why should service clearance be modeled?

Equipment can be clash-free in static position yet impossible to maintain. Filter withdrawal, U-tube bundle removal, plate frame expansion, and actuator access require clearance space.

Can YONGFAN provide project-specific geometry?

Yes. YONGFAN supports bespoke dimensions, custom YF-MOA plenum spigots, and engineered hydronic skids with project-specific technical drawings and 3D coordination files.

Can I use BIM geometry to approve a replacement product?

Only for physical fit checks. Aerodynamic airflow/pressure, filtration efficiency, and heat transfer duty must be verified separately against operating conditions.

06 / Coordination Boundaries

Coordinate the Selected Equipment, Not a Generic Model

Keeping building information models synchronized with the actual purchased hardware avoids expensive site rework and structural conflicts.
Boundary 01 / Selection First

Frozen Configuration

Narrow the product model and duty point before freezing 3D coordinates. Geometry changes when options change.

Boundary 02 / Service Volumes

Maintenance Envelopes

Always coordinate component removal paths: filter access doors, U-tube bundle pulling, and plate pack opening zones.

Boundary 03 / No Lightweight Fiction

Verified Interfaces

YONGFAN only provides geometry matching real connection flanges, nozzle schedules, and base mounting brackets.

Boundary 04 / Revision Control

Drawing Synchronization

If the quotation or drawing revision changes, verify that the 3D building model is updated with matching geometry.

07 / Digital Handoff

Request a BIM / CAD File

Send your proposed model codes, required file formats, software version, and project coordination needs — YONGFAN application engineers will provide verified digital files for your building model.

Revit Family (.RFA) MEP Connectors Open BIM IFC Models 3D STEP / SAT Solid Envelopes 2D DWG / DXF Mechanical Plans YF-MOA RCP Plenums U-Tube & PHE Service Zones
Request BIM / CAD Files View Product Drawings Contact Technical Support
Engineers reviewing BIM CAD 3D mechanical building models and technical submittals
YONGFAN Digital Engineering Support
BIM objects, 3D STEP solid models & 2D DWG mechanical coordination files.
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