What Is the Basis for Fan Selection in Air Showers?_Air Shower Manufacturer

Keywords: Air Shower Fan, Air Shower Selection, Centrifugal Fan, Air Shower Manufacturer, Zhongjing Purification, HEPA Filter Air Shower, Cleanroom Air Shower

The dust removal effectiveness and lifespan of an air shower depend critically on fan performance. Many users mistakenly believe that "higher power is always better," but selection should actually align with practical needs. As an air shower manufacturer, Zhongjing Purification summarizes 5 core selection criteria based on equipment R&D experience to help you choose the right fan.

1. Air Volume Must Match Air Shower Size to Avoid Waste or Insufficiency

Air volume must adequately cover the air shower space. Calculated based on a cleanliness standard of 200-300 air changes per hour:

• Single-person air shower (approx. 1.3m x 1m x 2.1m, volume 2.5m³): Requires an air volume of 500-750 m³/h.

• Double-person air shower (approx. 1.3m x 1.5m x 2.1m, volume 3.8m³): Requires an air volume of 760-1140 m³/h.

Insufficient air volume can lead to dead zones in airflow, while excessive volume wastes energy and may cause turbulent airflow, compromising cleaning effectiveness.

2. Wind Speed Must Meet National Standards, Balancing Effectiveness and User Experience

National standards specify that the outlet wind speed of an air shower must reach 20-30 m/s. This speed effectively removes microparticles larger than 0.3μm. Wind speed calculation must consider the number and layout of nozzles. For example, achieving 25 m/s wind speed through 12 nozzles of 20mm diameter requires a fan with corresponding static pressure. Insufficient wind speed hinders dust removal, while excessive speed can cause user discomfort and accelerate equipment wear.

3. Static Pressure Must Adapt to Filter System Resistance

Air showers typically include primary filters (resistance ~50 Pa) and HEPA filters (resistance ~200 Pa). Adding resistance from ducts and nozzles, the total system resistance usually ranges from 300-500 Pa. The fan's static pressure must overcome this total resistance; otherwise, airflow at the nozzles will be weak. For air showers requiring high cleanliness levels (e.g., in electronics factories) with HEPA filters, centrifugal fans with sufficient static pressure are necessary, as standard axial fans often cannot meet the demand.

4. Adapt to Specific Requirements of the Cleanliness Scenario

Different scenarios have varying requirements for fans:

• Pharmaceutical Workshops: Require low-noise fans (noise ≤65 dB). Centrifugal fans with soundproof enclosures can be chosen to avoid disrupting production.

• Food Workshops: High humidity environments necessitate fan motors made from anti-rust materials to prevent moisture damage.

• Semiconductor Workshops: Frequent equipment start-stop cycles require fans capable of withstanding over 100,000 cycles to ensure durability.

5. Balance Energy Consumption and Equipment Compatibility

Prioritize fans with high energy efficiency ratings to reduce electricity costs over long-term use. Compatibility with other equipment is also key: Variable Frequency Drive (VFD) fans allow adjustable wind speed, suitable for workshops switching cleanliness levels. Constant speed fans are more cost-effective for scenarios with fixed requirements.

Selecting a fan for an air shower requires precise matching of air volume, wind speed, and static pressure to the space and cleanliness needs, followed by considering additional requirements based on scenario specifics. Zhongjing Purification can configure suitable fans based on the air shower type (e.g., single-person/single-sided, double-person/double-sided) and usage scenario. Contact our professional team for selection advice or detailed fan parameters.