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Commercial HVAC
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Filtration for Power Equipment
Professional air filtration for EV charging devices, protecting against dust and sand ingress to ensure stable, reliable operation of charging piles and station infrastructure.
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Ultra-high efficiency filtration for semiconductor wafer fabs and precision electronics cleanrooms, capturing nano-scale particles to meet ISO Class 1–3 standards and maximize product yield.
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High-efficiency filtration for commercial building HVAC systems, improving indoor air quality, reducing energy consumption, and extending equipment service life.
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Precision air filtration for data centers, shielding servers and critical hardware from dust contamination to keep cooling systems running efficiently and reliably.
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Dedicated filtration systems for farms and livestock facilities — capturing dust, adsorbing ammonia, and inhibiting pathogen spread to improve animal health and overall productivity.
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Designed for spray booths and grinding workshops, efficiently capturing paint mist, metal dust, and wood chips to meet emission standards while protecting finished surface quality.
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First-Stage Large-Particle Capture
The first line of defense, capturing particles ≥5 μm such as dust, hair, and fibers to protect downstream filters and extend overall system service life.
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≥99.97% filtration efficiency for particles ≥0.3 μm, delivering sterile-grade clean air widely used in medical, pharmaceutical, and electronics manufacturing.
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Cut Costs, Reduce Waste
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Bag Filter
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Energy-Saving Operation
Industrial-Grade Heat Tolerance
Built with specialized heat-resistant materials, operating stably up to 250°C for paint ovens, industrial dryers, and high-temperature process environments.
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Core Performance Indicators of Air Filters: 5 Key Parameters & 4 International Standards
No more confusion when choosing air filters! This article provides a detailed analysis of five core performance indicators—filtration efficiency, pressure drop, dust holding capacity, rated airflow, and service life—while comparing ISO 16890, MERV, EN 1822, and other international standards. Understand technical specifications easily and select the most suitable product.
The performance of an air filter directly affects effectiveness and cost. Knowing the core performance indicators and international test standards is key to selecting the right filter. This guide explains the 5 critical parameters and 4 major international standards comprehensively.
I. 5 Core Performance Indicators: Understanding Technical Specifications
Filtration Efficiency
Definition: The percentage of particles of a specific size that the filter can capture
Example: 99% PM2.5 efficiency = only 1 out of 100 PM2.5 particles passes through
Importance: The most critical indicator of filtration performance
Rated Airflow
Unit: m³/h (cubic meters per hour) or CFM (cubic feet per minute)
Meaning: The airflow the filter can handle at optimal working conditions
Selection Tip: Should match system airflow; too low increases resistance, too high reduces efficiency
Pressure Drop
Initial Pressure Drop: Pressure loss of a new filter at rated airflow
Final Pressure Drop: Recommended replacement point (usually 2–3 times initial pressure)
Impact: Directly affects system energy consumption; every 50Pa increase can raise fan energy use by ~15%
Dust Holding Capacity
Definition: Total dust weight the filter can hold at final pressure drop (grams)
Significance: Higher dust capacity = longer service life and less frequent replacement
Factors: Filter media area, structural design, filtration efficiency
Service Life
Determining Factors: Environmental dust concentration, operating hours, dust capacity
Practical Application: Typically monitored via differential pressure, not a fixed duration
II. 4 Major International Standards: Testing and Classification
Standard | Applicable Range | Classification | Features & Advantages |
|---|---|---|---|
ISO 16890 (International) | General ventilation filters | ePM1, ePM2.5, ePM10 | Closer to real-world air quality assessment |
ASHRAE 52.2 (US) | Commercial ventilation filters | MERV 1-16 | Detailed grading, widely applied |
EN 1822 (Europe) | High-efficiency/ultra-high-efficiency filters | H10-U17 MPPS | Strictest testing method |
GB/T 14295 (China) | General ventilation filters | Coarse, medium, high-efficiency | Meets domestic requirements |
Detailed Explanation of Standards
ISO 16890 – International Standard
Test particles: PM1 (≤1μm), PM2.5 (≤2.5μm), PM10 (≤10μm)
Reporting: ePM1ₓ%, ePM2.5ₓ%, ePM10ₓ% (x = minimum efficiency)
Advantage: Reflects real-world air pollution, helps choose filters for specific pollutants
ASHRAE 52.2 (MERV) – Widely Used in the US
Rating: MERV 1-16 (higher number = higher efficiency)
Test method: Multi-disperse aerosol from 0.3–10 μm
Application: Main standard in North America, adopted by many international brands
EN 1822 – Authoritative HEPA/ULPA Standard
Applicable: HEPA/ULPA filters (high-efficiency/ultra-high-efficiency)
Key Concept: MPPS (Most Penetrating Particle Size)
Rating: H10-H14 (HEPA), U15-U17 (ULPA)
Strictness: Globally the most rigorous high-efficiency filter standard
China National Standards
GB/T 14295: General ventilation air filters
GB/T 13554: High-efficiency air filters
Feature: Tailored for Chinese environmental conditions and widely used domestically
III. CADR Value: Key Indicator for Household Purifiers
Definition: Clean Air Delivery Rate (CADR)
Test pollutants: Smoke, dust, pollen
Significance: Higher CADR = faster purification
Selection Formula: Suitable area = CADR × (0.07–0.12)
IV. How to Choose a Filter Based on Indicators?
Step 1: Determine Needs
Target pollutants: PM2.5? Pollen? Bacteria?
Application: Home? Commercial? Industrial?
Step 2: Check Efficiency Ratings
General ventilation: ISO ePM or MERV ratings
High-efficiency requirements: EN 1822 or GB/T 13554 levels
Step 3: Evaluate Cost-effectiveness
Low initial resistance: saves operational energy
High dust-holding capacity: longer replacement cycle
Comprehensive consideration: lowest lifecycle cost
Expert Advice:
Selecting a filter should consider a balance of efficiency, pressure drop, and dust capacity. High-efficiency but high-resistance filters may increase energy consumption, while low-resistance but low-efficiency filters may provide insufficient protection.
Professional Selection Support
Need expert guidance? Whalesens provides:
✅ Free technical consultation: recommend the most suitable model based on your needs
✅ Lifecycle cost analysis: help you make the most economical choice
Get professional selection advice now:
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