EV Charging Stations
Filtration for Power Equipment
Cleanroom & Semiconductor
Ultra-High Cleanliness Filtration
Commercial HVAC
Central Air System Filtration
Data Centers
Precision Equipment Protection
Livestock & Farming
Farming Environment Purification
Spray Booths & Industrial Dust
Paint Mist & Dust Purification
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.
View Related Products →Ultra-High Cleanliness Filtration
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.
View Related Products →Central Air System Filtration
High-efficiency filtration for commercial building HVAC systems, improving indoor air quality, reducing energy consumption, and extending equipment service life.
View Related Products →Precision Equipment Protection
Precision air filtration for data centers, shielding servers and critical hardware from dust contamination to keep cooling systems running efficiently and reliably.
View Related Products →Farming Environment Purification
Dedicated filtration systems for farms and livestock facilities — capturing dust, adsorbing ammonia, and inhibiting pathogen spread to improve animal health and overall productivity.
View Related Products →Paint Mist & Dust Purification
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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Pre-Filter (G1–G4)
First-Stage Large-Particle Capture
Medium-Efficiency Filter (F5–F9)
Precise PM2.5 Capture
HEPA High-Efficiency Filter
Sterile-Grade Purification
ULPA Ultra-High Efficiency Filter
Sub-Micron Particle Capture
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.
View Related Products →Precise PM2.5 Capture
Captures fine particles of 1–5 μm including PM2.5, pollen, and mold spores, significantly improving indoor air quality for commercial HVAC and ventilation systems.
View Related Products →Sterile-Grade Purification
≥99.97% filtration efficiency for particles ≥0.3 μm, delivering sterile-grade clean air widely used in medical, pharmaceutical, and electronics manufacturing.
View Related Products →Sub-Micron Particle Capture
≥99.9995% efficiency for particles ≥0.12 μm, meeting the extreme cleanliness demands of semiconductor fabs, aerospace, and other ultra-precision applications.
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High-Temperature Resistant
Industrial-Grade Heat Tolerance
Washable & Reusable
Cut Costs, Reduce Waste
Activated Carbon
Odor & Harmful Gas Removal
Bag Filter
High Dust-Holding, Long Life
Panel / Pleated Filter
Compact Space-Saving Design
Low-Resistance Airflow
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.
View Related Products →Cut Costs, Reduce Waste
Cleanable by water washing or air blowing, reusable multiple times to significantly reduce replacement frequency and O&M costs — an economical, eco-friendly choice.
View Related Products →Odor & Harmful Gas Removal
Leverages activated carbon's high adsorption capacity to eliminate odors, VOCs, and formaldehyde, ideal for newly renovated spaces and industrial exhaust treatment.
View Related Products →High Dust-Holding, Long Life
Bag-style construction delivers a larger filtration area, high dust-holding capacity, and extended service life — ideal for high-dust environments with reduced replacement frequency.
View Related Products →Compact Space-Saving Design
Compact form factor for easy installation and replacement; pleated structure maximizes filtration area within a small footprint for higher efficiency.
View Related Products →Energy-Saving Operation
Low-resistance design minimizes pressure drop while maintaining filtration performance, reducing fan energy consumption for cost-effective, eco-friendly operation.
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Complete Air Filter Classification: 3 Dimensions & 8 Types Guide
With the wide variety of air filters available, how can you choose the right one? This article provides a comprehensive analysis of 8 types of air filters across three dimensions: efficiency levels, structural forms, and filtration principles. It helps you easily find the most suitable product.
Air filters are the core components of air purification. Understanding their classification is the first step in selecting the right product. According to different standards, air filters can be categorized into three main types, each with unique performance characteristics and applications.
I. Classification of Air Filters by Filtration Efficiency: From Basic Protection to Extreme Purity
Filtration efficiency is the primary criterion for selecting a filter. International standards are as follows:
| Efficiency Level | International Standard | Particle Size | Typical Application |
|---|---|---|---|
| Primary Filter | G1-G4 (EN779) / MERV 1-8 (ASHRAE) | >5μm | Pre-filtration, protect downstream equipment |
| Medium Filter | F5-F9 (EN779) / MERV 9-14 (ASHRAE) | 1-5μm | Commercial buildings, general hospital areas |
| High/Intermediate Filter | H10-H12 (EN1822) / MERV 15-16 (ASHRAE) | 0.5-1μm | Hospital operating rooms, laboratories |
| HEPA High-Efficiency | H13-H14 (EN1822) | 0.3μm, ≥99.97% efficiency | Sterile pharmaceutical, electronic cleanrooms |
| ULPA Ultra-High-Efficiency | U15-U17 (EN1822) | 0.1-0.2μm, ≥99.999% efficiency | Semiconductor manufacturing, biosafety labs |
Data Source: ISO / EN / ASHRAE Standards
II. Classification by Structure: Adapting to Different Spaces and Airflows
Panel Filter
Features: simple structure, cost-effective, low resistance Application: primary filtration, first-stage protection in HVAC systems
Bag Filter
Features: large surface area, high dust holding capacity, long service life Application: medium filtration, mainstream choice for commercial HVAC systems
Pleated / Folded Filter
Features: increased surface area via folding, high efficiency with low resistance Application: medium to high-efficiency filtration in limited spaces
Cartridge / Cylindrical Filter
Features: deep filtration structure, extremely high dust holding capacity Application: industrial dust removal, engine intake protection
Box Filter
Features: robust structure, accommodates more filter media Application: high-efficiency filtration, large airflow requirements
III. Classification by Media & Filtration Principle: Targeting Different Pollutants
Mechanical Filter (Physical Interception)
Principle: captures particles via fiber gaps, inertial impaction, and diffusion Advantage: no ozone production, safe and reliable Suitable for most particulate filtration scenarios
Electrostatic Filter (Electrostatic Capture)
Principle: charges particles and captures them on collector plates Advantage: washable and reusable Note: may produce trace ozone, must comply with safety standards
Activated Carbon Filter (Chemical Adsorption)
Principle: uses the large surface area of activated carbon to adsorb odors and VOCs Suitable for: renovation pollution, industrial odors, kitchen fumes
Composite Filter (Multi-Technology)
Combination forms: HEPA + activated carbon, electrostatic + catalytic, UV + photocatalyst Advantage: removes both particles and gaseous pollutants Suitable for: high-demand indoor environments and special industrial applications
IV. How to Choose? 3 Steps to Identify the Best Solution
Step 1: Identify Main Pollutants
Particles (PM2.5 / pollen / dust) → Mechanical / HEPA filters Renovation odors / formaldehyde → Activated carbon filters Bacteria / viruses → HEPA with antibacterial coating or UV sterilization
Step 2: Determine the Application Scenario
Home / Office → Panel / Bag medium filters Hospital / Laboratory → High-efficiency HEPA filters Industrial Dust Removal → Cartridge / Box filters
Step 3: Consider Operating Costs
Initial investment: Panel ＜ Bag ＜ High-efficiency Running cost: consider replacement frequency and energy consumption Lifecycle cost: high dust-holding capacity filters are more economical
Professional Support: Still unsure which filter to choose? Whalesens offers professional assistance: ✅ Free technical consultation: recommend the most suitable model based on your needs ✅ System design support: provide a complete air handling solution
🌐 Official Website: www.whalesens.com
📞 WhatsApp: (+86) 13119189886
📧 Email: whalesens@gmail.com
Need a custom air filtration solution?
Contact the Whalesens engineering team for product selection and OEM/ODM support.
Email whalesens@gmail.com