A Brief Overview of Key Points in Laboratory Renovation

I. Preliminary Planning and Layout

The layout prioritizes the separation of clean and contaminated zones, rationally organizing clean areas, general operation areas, sample pretreatment areas, reagent storage rooms, waste holding areas, and airlocks. Personnel flow, sample transport routes, and waste disposal paths are kept separate to prevent cross-contamination. Instrument rooms are situated away from vibration sources, and precision instruments are positioned away from corridors to avoid vibrations caused by foot traffic affecting test results. Space is also reserved for future equipment expansion, with advance planning for equipment dimensions, transport access, and maintenance clearance. Negative-pressure and atmospheric-pressure rooms are distinguished according to industry standards, and physicochemical laboratories are strictly separated from microbiology laboratories.

II. Selection of Enclosure Materials

Prefabricated color-steel cleanroom panels are primarily used for walls and ceilings; the panel cores meet Class A fire-resistance ratings, and joints are sealed with anti-mold neutral sealant to prevent mold growth. Flooring is selected based on the laboratory type: acid- and alkali-resistant epoxy flooring is used for physicochemical laboratories, while homogeneous PVC flooring is used for microbiology laboratories, featuring coved (rounded) skirting to prevent water accumulation. Airtight cleanroom doors and windows with observation panels are installed; clean areas do not feature standard openable windows, preventing the entry of dust and insects. Wall surfaces are resistant to acid and alkali corrosion, with additional anti-corrosion coatings applied in areas where strong acids or alkalis are handled.

III. Ventilation and Exhaust Systems

The exhaust system is a critical component. Universal exhaust hoods are installed in pretreatment rooms, and fume hoods are positioned away from primary walkways. Exhaust air is treated—via activated carbon adsorption or acid-alkali scrubbing towers—to meet discharge standards before release. Ductwork for different types of exhaust is routed separately; organic solvent exhaust and acidic exhaust lines are independent to prevent chemical reactions caused by gas mixing. Indoor pressure differentials are carefully controlled: clean areas maintain positive pressure relative to corridors, while reagent rooms and rooms handling toxic exhaust maintain negative pressure. Fresh air systems utilize primary and medium-efficiency filters, with HEPA filters installed for microbiology laboratories. Ductwork is insulated to prevent condensation on the pipe walls.

IV. Water and Electrical Infrastructure

Electrical circuits are categorized into general lighting, dedicated equipment circuits, and backup circuits; high-power instruments feature independent wiring and are equipped with voltage stabilizers. Splash-proof sockets are used in laboratories, while explosion-proof switches are installed in reagent storage rooms; sufficient socket locations are reserved, positioned away from areas directly above sinks. Water supply systems distinguish between tap water and purified water lines, with the latter constructed from PP-R or 316-L stainless steel. Drainage systems prioritize corrosion resistance; PP material is used for acidic and alkaline wastewater piping, and all sewage is routed to a neutralization tank before discharge into the municipal network. Anti-backflow floor drains are installed, with sealed drains used in clean areas. Emergency eyewash stations and safety showers are provided near reagent handling areas.

V. HVAC and Temperature/Humidity Control

Standard laboratories require only basic air conditioning, whereas precision instrument rooms are equipped with constant temperature and humidity units. Physicochemical laboratories maintain temperatures of 18–26°C and humidity levels of 40–65%. Microbiological laboratories strictly control temperature and humidity to prevent environmental fluctuations from affecting microbial culture; fresh air intake is calculated based on room occupancy and exhaust losses to ensure adequate indoor air exchange.

VI. Safety and Ancillary Details

Fire safety: Equipped with dry powder fire extinguishers and fire blankets; combustible gas alarms are installed in areas storing large quantities of organic solvents.

Reagent storage: Explosion-proof reagent cabinets are provided, with strong acids/alkalis and flammable/explosive reagents stored separately.

Noise reduction: Vibration-damping pads are installed on fan units to minimize operational noise from exhaust equipment.

Waste management: Dedicated waste liquid cabinets and solid waste storage areas are established, incorporating anti-seepage measures.

Compliance standards: Fit-outs for medical device, PCR, and microbiology laboratories strictly adhere to GMP or CNAS-CL01 standards to facilitate future inspections and acceptance.

VII. Construction Management Key Points

Construction proceeds in phases, with utility lines embedded before wall panels are installed; wall penetrations for utilities are properly sealed. The construction environment in clean areas is kept tidy; a thorough cleanup follows completion, succeeded by formaldehyde and airborne particle testing. Final acceptance checks cover pressure gradients, air change rates, and temperature/humidity parameters. If you require a concise version (suitable for short-answer questions), the summarized version is as follows:

Key aspects of laboratory fit-out include layout planning, material selection, ventilation and exhaust systems, utility routing (electrical and plumbing), temperature and humidity control, safety provisions, and construction acceptance. Ensure the separation of clean and contaminated zones; select corrosion-resistant and stain-resistant materials for walls and floors; design efficient exhaust systems to ensure emissions meet standards; segregate electrical circuits and use corrosion-resistant plumbing; regulate temperature and humidity according to experimental requirements; install necessary safety equipment such as eyewash stations and fire safety systems; ensure proper sealing during construction; and conduct final acceptance inspections in accordance with industry standards.