Airflow & pressure
Room-by-room supply, return, exhaust, transfer air and pressure cascade.
Mission Critical HVAC Engineering · delivered online
Mission Critical HVAC Engineering.Delivered Online.
From your layout to calculated systems, technical documentation and BIM development. Specialist HVAC engineering for cleanrooms, laboratories and mission critical facilities.
Fixed-price scope Human-reviewed No sales meeting required
Engineering snapshot
NorthBay Life Sciences · Sample
12
Rooms
18,400
m³/h supply
142
kW cooling
3
HVAC systems
Pressure cascade
Reference: corridor 0 Pa
Material airlock+10 Pa
Preparation+20 Pa
Aseptic core+30 Pa
Classification basis
EU GMP + ISO 14644
Planning range
USD 0.9–1.3M
Calculated with sketcHVAC Engineer reviewed
Instant online estimate
Estimate your project online
Select your rooms and systems to see an indicative price instantly.
No contact details needed to calculate your price.
From USD 790
HVAC engineering documentationIndicative engineering fee
USD 790
subject to scope confirmation
The starting fee covers up to 5 rooms and 1 HVAC system. Each additional room adds USD 250; each additional system adds USD 500.
BIM modelling, drawings and specialist options are quoted separately.
Discuss this scope5–10 days
Typical delivery
Remote by design
Every decision documented
NDA available
Before sharing files
From USD 790
Scope confirmed first
From layout to decisions
Engineering your team can actually use.
We turn room requirements and the available thermal data into airflows, pressure strategy and an HVAC system basis—ready for budgeting and local development.
What you receive
Enough engineering to make the next decision.
Calculated airflows, system criteria and clear documentation to assess feasibility, budget your project and move into detailed design.
How thermal loads are handled. If you provide a load study or room loads from HAP, Revit or W/m² values, we use your figures. Otherwise, we estimate envelope loads from the information supplied. Equipment and process gains come from your data; detailed load modelling is outside this package.
Thermal load basis
We use your load study, or estimate envelope loads if you do not have one.
HVAC system basis
System zoning, outdoor air strategy, filtration stages and preliminary terminals.
Investment range
Optional preliminary CAPEX range, assumptions and the main cost drivers.
Design documentation
Design basis, room data sheets, FDS and traceable calculation tables.
Engineering review
Every pack is checked by a cleanroom HVAC engineer before delivery.
Functional Design Specification
Design criteria, system concept, operating narrative and documented engineering assumptions.
Data Tables Report
Room conditions, thermal loads, air balances, system performance and terminal sizing.
Airflow P&ID
Supply and return schematics, room airflows, pressure conditions, HEPA terminals and equipment tags.
BIM Data Exchange
From the room model to calculated data and back to Revit: room results, terminal tags and design airflows connected to the model.
Project delivery
One place for the decisions and documents behind your project.
At handoff, your team receives a dedicated online project space. The agreed deliverables are organised by discipline and delivery stage, with the published version clearly separated from work in progress.
Each client space has its own link and access settings. Confidential projects are not listed here. Drawings and BIM models appear when they are part of the agreed scope.
View live demo
Explore sample deliverySample project
Explore a sample delivery space
Explore an English-language fictional project, with its online overview, technical documentation and delivery navigation.
Built for handoff
Design basisPDFApproved inputs & assumptions
Room data sheetsXLS / PDFConditions, loads & airflows
HVAC system basisPDFZoning & preliminary equipment
Calculation tablesXLS / PDFTraceable room-by-room results
Functional schematics / P&IDsPDFPressures, airflows & systems
Continue with HVAC drawings and BIM modelling
We can develop HVAC drawings and a fully parameterised Revit installation model, with the scope and level of detail agreed for your next stage.
For your local team
Specialist engineering, working with your local team.
We develop HVAC engineering and technical documentation for cleanrooms and critical facilities. We can also model the installation in Revit and support BIM coordination, working with your local team on project development and local approvals.
- Life-science owners assessing feasibility
- Architects and MEP teams without a cleanroom specialist
- Cleanroom contractors preparing a technical proposal
- Laboratory planners defining early project requirements
How it works
From requirements to documented engineering decisions.
We record the inputs, assumptions and design decisions at each stage, so your team can review the basis and trace the results.
Send your requirements
Share the layout, URS and known room conditions. No polished brief required.
Approve the design basis
We document our interpretation, assumptions and selected standards for your approval.
Receive the engineering documentation
Receive calculated systems and technical documentation. Continue with your local team or with our HVAC drawings and BIM modelling service.
A documented process
Every input and assumption stays visible.
The agreed design basis guides the calculations. Any changes are recorded through review and delivery.
Simple starting point
A defined scope before a detailed design.
Start with the HVAC engineering package. We review your inputs and agree the deliverables, then define the drawings and BIM development needed for the next stage.
If the project is not suitable for the service, no work starts and no project fee is charged.
HVAC Engineering
From USD 790
The study fee is estimated from the number of rooms and HVAC systems, then confirmed after reviewing the available information. A preliminary envelope-load estimate is included if no load study is supplied.
Design basisThermal load basisAirflow balancePressure strategyHVAC zoningFunctional schematics / P&IDsRoom data sheetsFDS & calculation reportOne written review round
Special containment, strict humidity, CAPEX estimates and BIM services are scoped separately. HVAC drawings and full BIM modelling are available as separately quoted next stages.
Estimate your project onlineBIM Package
From calculated data to a parameterised Revit model.
Choose the BIM support your project needs: a structured data exchange for your team's model, or a complete HVAC installation model developed by Cleanroom. Both keep calculated data connected to the design.
Requires a Revit model with correctly defined, bounded and named rooms, plus the sketcHVAC Revit add-in.
01
Export rooms from Revit
Use the sketcHVAC Revit add-in to extract the room list from your model and send us the exchange file.
02
Engineer in sketcHVAC
We import the rooms, apply your load study or estimate envelope loads, calculate airflows and define the diffuser and grille tags.
03
Receive the BIM exchange file
We return the structured sketcHVAC file containing the room results, terminal tags, quantities and design airflows.
04
Place terminals in Revit
Map the terminal tags to your chosen Revit families. The add-in then places each diffuser and grille automatically in its room, with its design airflow set as a parameter, ready to route and size the ductwork in Revit.
You provide
The room list exported from your Revit model using the sketcHVAC add-in.
We return
An exchange file with calculated rooms, terminal tags and design airflows. The add-in uses it to place the terminals in Revit after you choose their families.
BIM data exchange
Calculated data for your model
We return calculated room data, terminal tags and design airflows. Your team selects the Revit families and develops the model using the exchange file.
Full HVAC BIM modelling
We can model the installation
Cleanroom can develop the complete HVAC installation in Revit: equipment, ductwork and piping networks, diffusers and grilles, with calculated parameters and coordinated documentation. Scope, level of detail and deliverables are agreed and quoted separately.
Discuss BIM modellingA clear design boundary
International basis. Local review.
Our HVAC engineering follows the selected international standards and your project requirements. We work with your local team to connect this design basis with local review, approvals and professional certification.
ISO 1464401
EU GMP02
WHO guidance03
ASHRAE principles04
Client URS05
Local documents supplied06
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Calculated in a real engineering workflow.
Systems, rooms, loads and airflows share one traceable model. The same data feeds the review dashboards, FDS and Data Tables Report.
Questions
Before you send a layout.
Is this detailed engineering?+
The initial package defines the HVAC design basis, calculated systems and technical documentation. We can continue with HVAC drawings and a parameterised Revit installation model, with an agreed scope and quotation for each stage.
Can you also prepare HVAC drawings and BIM models?+
Yes. We can develop HVAC drawings and fully parameterised Revit installation models, including equipment, networks and air terminals. We agree the model requirements, family standards, level of detail and deliverables with you, and quote this stage separately.
What if I already have a thermal load study?+
We use your room loads from HAP, Revit or W/m² values, together with the equipment and process data you provide. If you do not have an envelope load study, we include a preliminary envelope estimate based on the information supplied. We do not replace a detailed load model.
Which standards can be used?+
The pack can be based on ISO 14644, EU GMP, WHO guidance and the project URS. Local codes, permits and professional certification remain with the local design team unless specifically agreed.
Do I need a sketcHVAC subscription?+
No. We use sketcHVAC as our calculation and documentation platform. You receive the agreed engineering outputs without buying software.
How does the Revit BIM package work?+
For the data exchange, your team exports the room list with the sketcHVAC Revit add-in. We return calculated room data, terminal tags and design airflows for Revit. You can also commission Cleanroom to develop the full HVAC installation model, with agreed families, parameters and deliverables.
Can you work under NDA?+
Yes. An NDA can be completed before any confidential layout or process information is shared.
How do we receive the project?+
Each project is delivered through its own online project space. Your team can review the agreed documents, drawings and BIM material by discipline and delivery stage. Access to client projects is shared directly and is not listed on this public website.
Start your study
Tell us what you already know.
A layout and room list are enough to begin. Share any load study you have, or the envelope information for our preliminary estimate. We will identify missing inputs before confirming scope.
NDA available before file sharing
Response within 1–2 business days
Scope confirmed before payment