A-level laminar flow cabinets & FFU application scenarios are clearly distinguished
I. FFU (Fan Filter Unit) application scenarios
FFU is a standardized air supply module. Its core function is to provide air supply for large areas of clean spaces. It must be used in conjunction with ceiling brackets and return air systems.
1. Electronics and semiconductor industry
Chip packaging, lithography workshops, SMT assembly clean rooms, achieve overall clean environments of 10,000, 10,000, and 10,000 grade respectively. The entire ceiling is covered with FFU to create a clean environment.
Assembly clean sheds, mobile clean rooms with top air supply units
Battery and photovoltaic component production workshops, large-scale unified purification
2. Pharmaceutical industry (entire A-level area)
Aseptic drug filling halls, freeze-drying and packaging workshops, form an A-level environment under the background of B-level clean rooms
Full coverage of large-volume injection and aseptic powder injection production lines
Air conditioning and ventilation systems for isolation units
3. Laboratories, precision processing
Optical lenses, precision instrument assembly workshops
Third-party testing clean laboratories, clean partitions for PCR areas with air supply systems
4. Built-in use as a supplement
Air supply core components for ultra-clean workstations, clean transfer windows
Negative pressure weighing rooms, built-in fan filter units in biological safety cabinets
Core features of FFU
Suitable for large-scale, unified purification of entire workshops; individual use at a single workstation cannot stably maintain A-level; lacking enclosures makes it vulnerable to surrounding turbulent air.
II. A-level laminar flow cabinet application scenarios
Laminar flow cabinets are independent and complete A-level protective equipment. They come with a static pressure box, enclosure, and equalization system. No need to renovate the entire factory building; only protect local workstations.
1. Core scenarios of GMP in pharmaceutical industry (most commonly used)
Single workstation in B-level clean areas: aseptic filling, semi-sealing, capping, aseptic sampling, aseptic liquid preparation
Renovation projects: original C/D-level ordinary clean rooms, install laminar flow cabinets to quickly achieve local A-level, without replacing the factory’s air conditioning ceiling
Aseptic transfer, opening bottles for material input, aseptic equipment packaging workstations
Long strip assembly lines with dedicated series laminar flow cabinets to form a continuous A-level protection zone
2. Medical device production
Aseptic dressings, implantable device assembly, aseptic packaging workstations
Medical consumables aseptic operation tables
3. Food, cosmetics aseptic production
Aseptic oral liquids, freeze-dried food packaging, aseptic makeup filling
Probiotics, active raw materials aseptic sampling operations
4. Laboratories, small-scale precision operations
Aseptic microbial sampling, standard substance weighing
Local aseptic operations for small optical components, precision parts
Mobile laminar flow cabinets for temporary sampling and on-site testing
Core features of laminar flow cabinets
Protect only a single / a section of workstation; suitable for renovation of old factories, scattered points, and local protection of production lines, ready to install and use immediately, not limited by the original clean level of the factory building.

Four. Differentiating by a single sentence
Uniform purification throughout the entire building, large-scale factory buildings → FFU ceiling system
Single-point workstations with local aseptic protection, renovation projects, local production lines → Class A laminar flow hoods