Based on the paper partition / aluminum partition you previously asked about, I have compiled a set of filter selection steps that can be directly implemented in the project. This selection process takes into account various factors such as working conditions, cleanliness level, environment, and cost, and is very practical in engineering.
1. First, determine these 4 core conditions:
Cleanliness level requirements
For general ventilation and comfort air conditioning: Medium efficiency is sufficient, and high efficiency is usually not necessary.
For 100,000-level and 10,000-level clean rooms: Initial efficiency + medium efficiency + high efficiency is required.
For 100-level, 1,000-level: High efficiency / ultra-high efficiency filters must be used.
درجة الحرارة والرطوبة البيئية
Normal temperature and dryness: Paper partition can be used for high efficiency.
High temperature, high humidity, and steam sterilization: Aluminum partition must be used for high efficiency.
Presence of corrosive and chemical gases
For ordinary air: Paper partition is feasible.
For acids, bases, and organic solvents: Only aluminum partition + anti-corrosion frame can be selected.
Vibration and installation conditions
Ceiling, quiet units: Paper partition can be used.
Near the fan, high vibration: Aluminum partition should be preferred, as it is less prone to damage.
2. Select directly based on the usage scenario (the most practical)
1. Ordinary comfort air conditioning, office buildings, shopping malls
Configuration: Initial efficiency G4 + medium efficiency F8
No need for high-efficiency filters, low cost, easy maintenance
2. Ordinary clean workshops, electronic assembly, food packaging (dry and normal temperature)
Configuration: Initial efficiency + medium efficiency + paper partition high efficiency
Advantages: Low cost, large dust capacity, high cost performance
3. Pharmaceutical factories, operating rooms, sterile wards
Configuration: Initial efficiency + medium efficiency + aluminum partition high efficiency / no partition high efficiency
Key: Resistance to moisture, high temperature sterilization, stable structure
4. High-temperature and high-humidity environments (boiling, sterilization, drying)
Must use: Aluminum partition high-efficiency filters
Paper partition is prohibited, as it will be damp and collapse
5. Semiconductor, precision electronics, high-cleanliness laboratories
Selection: No partition high-efficiency filters (PP partition)
Low resistance, thin volume, suitable for high-density installation
6. Chemicals, corrosive gases
Selection: Aluminum partition + stainless steel frame
Filter material selection should be resistant to chemicals
3. Principles for filter combination (very important)
Must have three-level protection
Initial efficiency protects medium efficiency → Medium efficiency protects high efficiency
Lack of the previous stage of filtration will cause the high efficiency to quickly clog, resulting in extremely high costs
Efficiency gradually increases
Initial efficiency G3/G4 → Medium efficiency F5-F8 → High efficiency H11-H14
The efficiency of the previous stage is too low, causing excessive burden on the subsequent stage
The final filter determines the air exchange rate and cleanliness
100-level: laminar flow + HEPA/ULPA
10,000-level / 100,000-level: turbulent flow + high-efficiency filters
4. Paper partition vs aluminum partition final selection rule
Dry and normal temperature, limited budget, ordinary clean area
→ Select paper partition high efficiency
High-temperature and high-humidity, sterilization environment, high cleanliness level, high vibration
→ Select aluminum partition high efficiency
Ultra-thin air outlet, low resistance, clean operating room
→ Select no partition high efficiency (PP partition)
5. Finally, consider the cost
Initial cost is low: paper partition
Long-term use cost is low: aluminum partition (longer lifespan, less replacement)
The total cost is the lowest: ensure the previous stage of filtration to protect the high-efficiency filter