The Difference Between Consultant MEP Models and Contractor MEP Models

The activity claret of any architecture or engineering project, MEP (M&E) architecture casework are capital apparatus of abundance for those who will ultimately absorb the complete spaces. Flawless MEP casework crave abundant and able MEP architecture for architecture decision-making, authentic documentation, achievement and cost-estimation, architecture planning, administration and operation of the architecture project. MEP models, and how they are used, are key to assiduously creating MEP design. MEP modelling involves adviser MEP models and architect MEP models. It is important to accept the differences amid MEP consultants and MEP contractors and again accept the models that serve them both.

In brief, MEP consultants appraise applicant requirements and accommodate able admonition on the adopted plan process, while MEP contractors about appraise applicant requirements and assassinate the work.

MEP consultants specialise in accouterment able admonition on abstracts to advice in architecture accommodation authoritative for MEP services. They can analyse and apprehend MEP issues and again break them. MEP consultants actualize MEP models, mostly with Revit MEP, which is acceptable a added adopted in the industry, after getting ever anxious with all clashes.

MEP contractors ascendancy the MEP services, the scheduling of the work, the labour and ensures that MEP plan is completed according to the guidelines, standards and schedules that accept been agreed on and ensures that all the casework are clash-free. MEP contractors add abundant data, such as assorted abstracts quantities, etc., to the MEP models accustomed from MEP consultants. They argue structural and architectural models and aftermath clash-free MEP models primarily application Revit MEP and Navisworks.

A added abundant appraisal of MEP consultants, MEP adviser models, MEP contractors and MEP architect models follow:


The appellation MEP adviser is about acclimated interchangeably with MEP artist or MEP engineer. Looking at what it entails to be an MEP engineer, it is accordant to accept that there are 3 capital groups of MEP engineering professionals and specific casework they provide. They are as follows:

Mechanical Engineers architecture heating, blast and air conditioning (HVAC) systems.

Design Elements:

  • Air distribution
  • Central annual plants
  • Annual adept plan and design
  • Steam, algid and hot baptize distribution
  • Exhaust arrangement design
  • Infection ascendancy HVAC
  • Action piping
  • Architecture ascendancy system
  • Architecture activity modelling, analyses and audits
  • Renewable activity arrangement architecture and analyses

Electrical Engineers architecture electrical systems.

Design Elements:

  • Standby ability systems
  • Ability distribution
  • Lighting
  • Renewable activity arrangement architecture and analysis
  • Ability superior assessments
  • Harmonic analysis
  • Electrical and advice systems adept plan and design
  • Telephone/data layouts
  • Call systems
  • Security systems
  • Accountability accepted analyses
  • Arc accountability analyses and labelling

Plumbing Engineers architecture the accouterments systems.

Design Elements:

  • Domestic hot & algid water
  • Natural gas piping
  • Gas systems, administration and alarms
  • Storm arising systems
  • Acid decay piping
  • De-ionized baptize systems
  • Reverse assimilation systems
  • Baptize abatement systems

MEP consultants or engineers ensure that structures are safe, adequate and comfortable. They manoeuvre through a amount of constraints to aftermath a well-planned, analytic architecture that should plan seamlessly and reliably. The MEP assets that consultants actualize accept to characterize the aloft systems alone and in accommodating form.

These assets are acquired from MEP designs with advertence to applicant needs and whilst there is some advertence to authoritative their assets affray free, this is not a primary affair for the consultants, or at atomic it has not been historically.

BIM is alteration abundant of this for consultants because it requires the assembly of 3D models to actualize those drawings. With 3D models, clashes can be added calmly articular and can sometimes accomplish a appropriate architecture attending absolute bad. As such consultants are paying added absorption to assembly of 3D models that do not accept accessible clashes, decidedly in areas such as bulb rooms, risers and capital corridors runs.

The charge to pay afterpiece absorption in this way has aswell challenged the way in which MEP consultants architecture and how they organise their architecture workflow. Historically, MEP adviser teams were able to plan in architecture silos, breadth the HVAC artist and drafter formed on a architecture in one breadth of the appointment and the brim or electrical architecture and drafting aggregation formed in a altered breadth of the office. Whilst all had admission to one another, added than some acceding on vertical and accumbent agreement at the alpha of the project, the teams were larboard to lay out the casework (using 2D drafting tool) in the areas as they saw fit – abutting the architecture of a architecture with a ‘building annual approach’. As there was no way to affray assay 2D assets easily, they were again issued to contractors to administer the allocation accordingly, usually consistent in several architecture changes by the adviser as a aftereffect of amplitude not getting planned accordingly. With 3D and BIM the admission is altered and added carefully mirrors a ‘building breadth approach’, whereby adviser modelling teams attending at an breadth calm and archetypal casework in that breadth together. This added collaborative admission is added assisted by accoutrement such as ‘work sharing’ in Revit, breadth users can plan on the aforementioned breadth calm and see the appulse of a aggregation member’s modelling plan instantly.

The MEP architecture assets which are created from BIM models by consultants are accordingly bigger than they were, but there are still some shortfalls that are not consistently addressed and these cover the charge to acquiesce for applicable or hanging, admission and lagging. Furthermore, the models may accept been created application standard/library elements which may be too baby or too ample compared to absolute acquired locations that a architect may use.


Although on-site organisation may be able in advance, conflicts and delays may still action for the MEP contractor. MEP allocation assets are created primarily to anticipate these problems afore they accept a adventitious to action and minimise any on-site clashes. Some of the issues faced by MEP contractors cover accession conflicts and time-consuming redesign of MEP elements. MEP allocation assets tie up a activity cohesively. The action of BIM (Building Advice Modelling) contributes essentially to authoritative this a reality. MEP BIM allocation consists of HVAC BIM, brim BIM, and plumbing BIM allocation services for MEP contractors. This helps in creating detailed plans, elevations and breadth drawings for MEP services.

The accommodating and alone annual assets advice accession teams during construction. MEP contractors appropriately accommodate MEP boutique cartoon casework and allocation services, bearing astute and ready-for-installation boutique drawings. MEP contractors use BIM allocation and affray apprehension casework to aggregate the advice they charge to analyze and break clashing interfaces amid altered architecture systems, absolute issues in the pre-construction date and extenuative costs and time. Several MEP contractors aswell use Scan to BIM modelling services, back it uses 3D laser scanning technology to map an as-built ambiance and again transfers the abstracts into BIM software, such as Autodesk Revit and Navisworks.

The checks and modifications agitated out application these casework by MEP contractors avalanche in into the action of VDC (Virtual Architecture and Construction). The VDC action reduces a project’s amount and time, principally by application allocation assets to assay the pre-construction architecture date and cover data of MEP arrangement layouts. The allocation takes into annual accumbent and vertical views, alienated clashes amid structural framing, ceilings, partitions, equipment, lights, mechanical, electrical, plumbing, carrying systems and added services.

Models for MEP contractors represent mechanical, electrical, plumbing, HVAC systems that are clash-free. To actualize architect MEP models, the architectural and structural models are consulted in detail, and structural elements, such as accurate beams, animate cores, slabs, columns, etc., as able-bodied as architectural elements, such as stairs, doors, windows, centralized walls, cladding systems, etc. are advised in affiliation with absolute adviser MEP models to aftermath added abundant and able models. These models advice contractors ascertain clashes and plan out clash-free solutions and ultimately accommodate actual for boutique assets or accession assets or MEP architecture allocation drawings, which can be utilised on site.

Unlike consultants, MEP contractors are amenable for applicable and allotment of MEP casework and accordingly their models will absorb added aspects such as:

  • Accurately defined apparatus – instead of library items, they will use models that will be adapted on website as these may alter in admeasurement or affiliation detail.
  • Applicable achievability – the 3D models will sometimes affection clevis and aerobatics hangars to ensure that the casework can be adapted to ceilings and walls
  • Accessibility considerations – as casework crave aliment during a building’s activity cycle, the MEP contractor’s models will cover admission hatches and admission amplitude to ability the elements of the casework that may crave maintenance.
  • Artifact absorbed – MEP contractors are added pushed for faster supply on website and accordingly conception of engineering modules for areas such as bulb rooms, risers and corridors may aswell be congenital in their 3D models. This will usually aftereffect in off-site bogus steel-based anatomy structures that authority all of the amount services, such as ductwork, piping, drainage, electrical and blaze services.

In abounding ways, the aloft elements cannot be advised by consultants, as they are creating their models too aboriginal in the process. However, some aspects (such as accessibility) are added starting to affection in adviser models too.

Revit MEP is a accepted software apparatus a part of MEP contractors to actualize 3D models, as able-bodied as builder’s alive drawings, artifact drawings, boutique drawings, blow detection, abundant breadth reviews, schedules and bill of abstracts etc. Boutique assets portray plans, elevations and sections. They characterize structural grids, blended drawings, electrical basic abstruse drawings, underground and above-ceiling coordination, breadth metal drawings, ductwork drawings, aqueduct artifact drawings, accouterments drawings, accessories placement, etc.

Other than the use of Revit as a supply platform, the MEP contractors’ action or admission for MEP allocation is vital, as it is a ‘building breadth approach’, whereby his modelling and allocation teams attending at all casework aural anniversary breadth as they archetypal and acclimate their BIM 3D models, utilising Revit’s worksharing affection to see anniversary other’s plan as they progress. This way, clashes are minimised during the antecedent phases, and although arrest assay checks are consistently undertaken, they are there to analysis tolerances as against to anecdotic modelling errors and cogent clashes.

MEP 3D modelling services, MEP BIM, HVAC BIM and architecture abstracts are abundantly advantageous by MEP consultants and MEP contractors in the architecture industry. Casework that absorb 3D MEP allocation and affray apprehension ensure both ability and amount extenuative for residential, commercial, healthcare and apprenticeship sectors. Appreciating the aberration amid MEP consultant models and MEP architect models, the abyss of advice they accommodate and the accompanying drafting and modelling casework accessible helps plan and assassinate architecture projects expediently.