1. Air supply ceiling ( laminar flow air supply ceiling ) Advantages
Air quality is excellent: vertical unidirectional laminar flow, without vortices or turbulence, capable of continuously suppressing floating dust and preventing cross-contamination, suitable for clean areas of Class 100/ISO 5 and above standards.
Uniform air outflow: large static pressure box + uniform flow structure, consistent air speed across the entire surface, stable temperature, humidity and cleanliness in the area.
Strong purification capacity: standard configuration of multiple-level filtration (primary / intermediate / high-efficiency / ULPA), capable of deeply trapping micro-particles, meeting strict requirements of GMP, medical, and semiconductor industries.
Good local control and purification effect: can form a local clean core area, allowing for a more relaxed requirement for the overall workshop’s cleanliness, and reducing overall operation and maintenance costs. Disadvantages
High cost: Complex structure, numerous components (static pressure box, multi-stage filters, equalizing components), procurement and installation costs are much higher than those of ordinary air vents.
High wind resistance and high energy consumption: The multi-stage filters and long air flow path result in high wind resistance, requiring a high static pressure fan to be matched. Long-term operation consumes more electricity.
Complex maintenance: Filters, seals, fans, and equalizing components need to be inspected, replaced, and leak-checked regularly, resulting in a large amount of maintenance work.
Large space occupation: The static pressure box has a certain height, which requires higher ceiling height. The on-site installation space is limited.
Low wind speed: Only suitable for clean environment dust control, with slow air exchange and cooling speeds, not suitable for simple ventilation scenarios.
III. Ordinary Air Ventilation Vents (Blades / Diffusers) Advantages
Simple structure, low cost: Few components, convenient for procurement, installation and construction, with high cost-effectiveness.
Low wind resistance, low energy consumption: Short air flow path, no complex filtering and rectification structures, low fan load, energy saving.
Fast ventilation and heat exchange: High outflow wind speed, strong turbulent diffusion, high efficiency for space ventilation, temperature adjustment and dehumidification, suitable for conventional air conditioning ventilation.
Small space occupation: Lightweight body, low requirements for ceiling and duct installation space, suitable for most buildings.
Simple maintenance: Generally only needs to clean the coarse filter regularly, no leak detection or complex maintenance requirements. Disadvantages
Air flow disorder: Predominantly turbulent flow, prone to generating vortices and dust accumulation, unable to control suspended particulate matter, not suitable for high-cleanliness areas.
Weak purification capacity: Most are equipped with only coarse filters, without high-efficiency filtration, unable to intercept sub-micron dust.
Inconsistent air distribution: Without dedicated static pressure chambers, there are significant differences in local wind speed and pressure at the air outlets, resulting in dead zones in some areas.
容易造成污染扩散： The air flow crosses and swirls， spreading the dust and microorganisms within the area in all directions， posing a risk of cross-contamination.
III. Core Choices Summary
Select air supply ceiling： Priority requirements = High cleanliness， dust control， anti-pollution， willing to accept high costs， high energy consumption， and complex maintenance.
Select ordinary air outlets： Priority requirements = Conventional ventilation， air conditioning heat exchange， low cost， easy maintenance， no requirement for high cleanliness level.
