The core feature differences of supply air ceilings with different cleanliness grades are mainly concentrated in the filtration configuration, air flow pattern, structural design and applicable scenarios. The higher the grade, the stricter the cleanliness control and the more refined the functional configuration. The specific features are as follows:
Class I (100 grade/ISO 5 grade) : High-purity and high-stability type
Filtration system: Equipped with 8-10 H14 grade high-efficiency filters (filtration efficiency ≥99.995%@0.3μm), combined with a three-stage enhanced filtration system of “primary efficiency + medium efficiency + high-efficiency”, it has the strongest microbial interception capacity.
Airflow organization: The entire room adopts a vertical unidirectional flow, with the wind speed stabilized at 0.25-0.35m/s, forming a “piston-like” airflow. There are no vortex dead corners, and the uniformity of cleanliness in the surgical area is the best.
Structural design: Dimensions ≥2.95m×2.5m, adopting a leak-proof design. A medium-speed airflow compensation device is installed in the middle area to accommodate large shadowless lamps and prevent airflow attenuation. The panel is made of 304 stainless steel with an antibacterial coating, featuring extremely strong sealing performance (the splicing gap is ≤0.5mm).
Adaptation core: Specifically designed for high-risk surgeries, it has slightly higher operating noise (but ≤65dB), higher energy consumption and maintenance costs, and emphasizes “zero pollution risk”.
Class II (1000 / ISO 7) : Balanced and compatible type
Filtration system: Equipped with 4 to 6 H13 grade high-efficiency filters (filtration efficiency ≥99.97%@0.3μm), with a standard three-stage filtration configuration, it takes into account both cleanliness and economy.
Airflow organization: Supports vertical unidirectional flow or mixed flow mode, with adjustable wind speed of 0.2-0.4m/s and an air change rate of ≥15 times per hour. This not only ensures the cleanliness of the surgical area but also reduces energy consumption.
Structural design: Dimensions ≥2.6m×1.8m, featuring an aluminum alloy crimped flow equalization mesh. It can be integrated with LED purification light strips and features an integrated sealed design with shadowless lamps and hanging towers, offering high installation flexibility (flatness error ≤3mm).
Adaptation core: For routine surgeries, it offers superior noise control (≤60dB), a moderate maintenance cycle (high-efficiency filters need to be replaced every 2-3 years), and strikes a balance between “cleanliness requirements and usage costs”.
Class III (10,000 grade/ISO 8 grade) : Economical and practical
Filtration system: Only 2-4 H13 grade high-efficiency filters are configured, with a three-stage filtration basic configuration, meeting the microbial control requirements of low-risk surgeries.
Air flow organization: Non-unidirectional air supply is adopted, with an air change rate of ≥12 times per hour. The air flow organization is simpler and does not require strict “piston” control, making it suitable for small Spaces or rapid deployment scenarios.
Structural design: Dimensions ≥2.6m×1.4m, modular splicing structure, factory prefabrication and on-site assembly (installation period ≤72 hours), panel with optional simplified antibacterial treatment, sealing requirement lower than I/II grade.
Core adaptation: Targeting general and emergency surgeries, it features the lowest cost and the most convenient operation and maintenance (high-efficiency filters need to be replaced every three years), emphasizing “rapid deployment and economy”, with no compromise on core functions.
