English
русский
Français
Español
عربىTechnical Parameters and Typical Upgrade Options
Every retrofit starts with a survey of what is there. The existing structure, ceiling height, services and HVAC capacity often decide what is possible. The table shows common upgrade types and what to check.
| Upgrade type | Typical work | What to check |
|---|---|---|
| Convert a hall into a cleanroom | New panels, ceiling, doors, airlocks | Ceiling height, floor flatness, column grid, HVAC capacity |
| Upgrade class (for example ISO 8 to ISO 7) | More HEPA coverage, tighter envelope, better airlocks | Air handler capacity, duct size, pressure plan |
| Renew worn surfaces | Replace panels, doors, windows, re-seal joints | Existing leakage, cleaning agents, downtime window |
| Add airlocks or pass boxes | New openings, interlocks, sealing | Wall structure, traffic flow, pressure effect |
| Extend an existing room | Add panels, profiles and HEPA supply | Match of finish, air supply and pressure |
| Improve airtightness | Reseal penetrations, replace gaskets, upgrade doors | Leakage test results |
| Add a modular POD | Install a complete room inside the hall | Floor loading, utilities, access route |
Typical survey items:
- Structure: floor flatness, column positions, roof loads and available height.
- Services: HVAC capacity, duct routes, power, water, drains and fire protection.
- Existing room: leakage, particle counts, pressure, surface condition and records.
- Operations: shift patterns, allowed downtime and noise or dust limits.
- Compliance: fire rules, building codes and change control requirements.
Please also tell us which parts of the existing cleanroom must stay in use during the work. This decides the phasing plan, the temporary barriers and the order in which new rooms are completed.
Our staff reply promptly and in plain language, and our designers can adapt standard layouts to your building and your process.
Cross-Border Delivery and Localized Construction Support
Retrofit work happens in a live building, often in a country far from our factory. We therefore combine careful remote surveying, precise factory preparation and phased site work, so site time is short and well planned.
- Survey: you send drawings, photos and measurements, or a local surveyor or scanner collects them.
- Design: we prepare layouts that fit the real dimensions, with details for existing columns and services.
- Factory preparation: panels, doors and profiles are made to size and numbered, and tricky parts are test-fitted.
- Packing and shipping: flat-pack loading with protection, and documents with FOB, CFR or CIF terms.
- Phased installation: work is scheduled by zone, with temporary barriers and clear handover points.
Local construction: work in an operating plant needs dust barriers, negative pressure in the work zone, controlled routes for materials and waste, and clear rules for permits such as hot work. Modular panels help, because they are assembled dry, with little dust and noise. Night or weekend work may be needed to protect production.
After installation, the owner should plan cleaning, testing and change control before the area returns to use. Local building, fire and safety rules apply, and your contractor remains responsible for site safety and approvals.
For overseas retrofits, a laser scan or a careful photo survey by a local partner saves a visit and improves accuracy. We can guide your local surveyor with a simple checklist, and then prepare a design that fits the real building, with allowances for small differences.
Staged shipments can also be arranged, to match the work zones.
Quality Control and Certification
Retrofit quality has two parts: the new components and the way they join the old building. We control the first in our factory, and we control the second through survey, drawings, installation guidance and checks.
| Stage | Control | Value for the owner |
|---|---|---|
| Survey review | Check of dimensions, services and constraints | Design fits reality |
| Design | Drawing review and owner approval | Fewer surprises on site |
| Materials | Incoming inspection of sheet, face, core, profiles, gaskets | Known quality |
| Production | Dimensions, bonding, edge sealing, trial fitting of critical parts | Consistent, accurate parts |
| Installation | Checklist for joints, penetrations and doors | Tighter rooms |
| Testing | Support for leakage, pressure and particle tests | Verified result |
Documents available: drawings, material specifications, factory inspection records, filter data and, where available, test reports. These can be added to your change control record.
Regulated plants must treat a retrofit as a change and re-qualify the affected areas. We provide the technical information for your change control and qualification files, while your quality unit and an independent tester decide what must be re-tested. Factory audits and sample approvals are welcome.
Regulated owners need to show that a retrofit did not harm the existing qualified state. We help by providing a clear list of changed components, drawings and material data, and we welcome factory audits and sample approvals. Batch records are kept for each project.
We recommend agreeing with your quality unit, before work begins, which tests will be repeated after the change, such as pressure, airflow, filter integrity and particle counts.
Our staff reply promptly and in plain language, and our designers can adapt standard layouts to your building and your process.
After-Sales Service and Response Capability
After a retrofit, new and old parts must work together for years. We keep survey data, drawings and batch records, so any later question can be answered from the full history of the project.
- Fast communication: technical questions answered in English by email, phone or messaging.
- Remote diagnosis: photos, videos and test data help us find causes.
- Spare parts: panels, doors, gaskets, windows, filters and equipment parts.
- Further phases: additional rooms or upgrades can be planned from the earlier design.
- Engineer visits: by arrangement.
Typical post-retrofit issues:
| Observation | Possible cause | Suggested action |
|---|---|---|
| Pressure lower than expected | Leaks at old-to-new junctions | Seal junctions, test again |
| Class not reached | Air supply or filter coverage too low | Review HVAC capacity and HEPA layout |
| Finish mismatch between old and new | Different panel batches | Plan replacement or repainting of old areas |
| New opening leaks | Unsealed penetration | Reseal with suitable material |
We suggest recording baseline test results after the retrofit, which makes later comparison easier.
Retrofit projects often continue in phases, so the relationship continues after each handover. We suggest keeping a living drawing set that marks each phase, and sharing photos of finished work with us. When you plan the next phase, we compare it with the records and prepare matching parts.
Replacement parts are made to the original specification, so appearance and performance match the earlier phases. For urgent cases, we discuss the fastest shipping option and prepare documents in advance.
A small stock of spare gaskets, sealant and panels at the site helps you act the same day.
Commercial Terms, Warranty and Lifecycle Cost
A retrofit often costs less than a new building, but it carries more uncertainty. Hidden conditions, such as unknown services above a ceiling or an uneven floor, can add cost, so we recommend a survey, a clear scope and a contingency in the budget.
| Item | Our approach |
|---|---|
| Quotation | Itemized by area and work type, with survey assumptions stated |
| Pricing | Fixed price for defined scope; unit prices for items that depend on site conditions |
| Trade terms | FOB, CFR or CIF for supply; installation terms in the contract |
| Payment | Commonly a deposit with balance before shipment or against documents; final terms in the contract |
| Changes | Written change orders with price and time effect |
| Warranty | Defined by component group in the contract |
Where retrofit value comes from:
- Speed: dry, modular construction shortens downtime.
- Reuse: existing HVAC, utilities and shells may be kept, if capacity allows.
- Phasing: work in zones keeps part of the plant running.
- Future flexibility: modular rooms can be moved or enlarged later.
HVAC upgrades, electrical changes, demolition by others, waste disposal, re-qualification and permits are outside our supply unless agreed. Warranty exclusions are stated clearly in the contract.
When comparing retrofit offers, check what assumptions each supplier made about site conditions, how changes are priced and who handles demolition, waste and temporary protection. A low offer based on optimistic assumptions can grow quickly.
We provide itemized quotations that state our survey assumptions, and we are glad to explain every line and to prepare alternative options, such as a phased scope.
Real Factory Strength for Retrofit Projects
Retrofit needs flexibility and quick answers. Pharma United Co., Ltd., founded in 2006, runs two factories in Kunshan and Qianjiang covering 20,000 m², with more than 60 staff. We are a manufacturer, not a trading company.
| Indicator | Information |
|---|---|
| Experience | 20+ years in cleanroom engineering |
| HPL cleanroom panels | About 250,000 m² per year; China's largest HPL cleanroom panel manufacturer |
| Container shipments | More than 1,000 forty-foot high-cube containers per year |
| Location | Kunshan, about 30 km from Shanghai |
| Product range | Panels, doors and windows, equipment, modular PODs, HEPA products |
| Service | Design, manufacture and installation support |
Why this helps retrofit owners: because we make panels, profiles, doors and equipment ourselves, we can produce odd sizes, special junction parts and matching replacements quickly. Our modular PODs also give a fast way to add capacity inside an existing hall.
Customers can visit the factory, review production records, ask for references from similar projects and see sample panels. A showroom video is available for remote review.
Our designers prepare layouts and detail drawings, our engineers review junctions with existing structures, and our production teams run dedicated lines for panels, doors, windows and equipment. Export coordinators prepare packing and documents for shipments to many countries.
Customers in pharmaceutical, hospital, food and electronics fields return for further phases and spare parts, and we can share photos and videos of completed projects on request. Visitors are welcome at our factory by arrangement.
Our staff reply promptly and in plain language, and our designers can adapt standard layouts to your building and your process.
Cleanroom Retrofit & Upgrade FAQ
Q1. Can an existing hall become a cleanroom?
Often yes, if the structure, ceiling height and utilities allow. A survey is the first step.
Q2. Can I upgrade ISO 8 to ISO 7?
Sometimes. It usually needs more air supply, more HEPA coverage and a tighter envelope. HVAC capacity is often the limit.
Q3. Can work continue while production runs?
Yes, with phased zones, dust barriers and strict control. Dry modular construction helps, and some work may be done at night or on weekends.
Q4. Do I need to re-qualify after changes?
Regulated plants treat a retrofit as a change and re-qualify the affected areas. Your quality unit decides the scope.
Q5. Can new panels match old ones?
We can match thickness, color and profile where possible, although old finishes may differ slightly. We discuss options.
Q6. How long does a retrofit take?
It depends on size, complexity and allowed downtime. We give a schedule after the survey.
Q7. How do I start?
Send drawings, photos, target class and destination country, and we will plan the survey and a proposal.
Q8. What are the biggest risks in a retrofit?
Hidden conditions, limited HVAC capacity, tight downtime windows and incomplete records. A good survey reduces them.
Q9. Do you offer samples?
Yes, samples of panels, joints and doors can be sent for approval.
Our staff reply promptly and in plain language, and our designers can adapt standard layouts to your building and your process.
We are glad to explain every line of our quotation and to prepare alternative options if you need to adjust the budget.
