Multi-Frame Options, G4 Efficiency – Ideal for Pre-Filtration in Commercial & Industrial Systems
We specialize in custom G4 pleated green-white cotton panel air filters.These filters are your go-to pre-filtration solution for capturing large dust,lint,and particles.This filter features a dense green-white melt-blown chemical fiber media (G4 efficiency),a protective grid cover,and 4 optional frame materials (plastic,galvanized steel,aluminum,stainless steel) – all built to your exact specs.We sell straight from our workshop: skip middlemen,cut costs by 20-30%,and get a filter tailored for your system's needs.
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Basic Information
| Brand Name | Huazhijie | Product Name | G4 Air Filter |
| Frame Material | Plastic / Galvanized steel / Aluminum / Stainless steel | Filter Media | Melt-Blown Chemical Fiber (Green-White) |
| Dust Holding Capacity | 180–250g/m² (lasts 3–4 months) | Dimensions | Custom |
| Efficiency Rating | G4 (90% of particles ≥5μm) | Initial Air Resistance | ≤40Pa (at 300m³/h) |
| Operating Temperature | -10°C to 70°C | Maximum Humidity | 70% RH |
| OEM | Yes | Certifications | ISO 9001 |
Core Features That Make This G4 Filter Stand Out
- G4 Green-White Melt-Blown Fiber Media
The green-white bi-color pleated media (G4 efficiency) captures 90% of particles ≥5μm (dust, lint, hair, food crumbs) – perfect for protecting your high-efficiency downstream filters (extends their lifespan by 50%).
Melt-blown chemical fiber is water-resistant and tear-resistant, even in high-humidity spaces (e.g., kitchen vents).
- 4 Optional Frame MaterialsChoose the frame that fits your budget and environment:
Plastic frame: Lightweight, low-cost (ideal for residential/commercial HVAC).
Galvanized steel frame: Rust-resistant, durable (for industrial warehouses).
Aluminum frame: Lightweight, corrosion-proof (for coastal or humid areas).
Stainless steel frame: Heavy-duty, food-safe (for restaurant kitchens or food processing plants).
- Protective Grid CoverThe rigid grid (visible in the photo) keeps the pleated media from collapsing under high airflow – maintaining consistent filtration performance.
- Pleated StructureFolded media boosts filtration area by 40% vs. flat filters – so it holds more debris before needing replacement (cuts maintenance frequency by 30%).
Specific Application Scenarios
- Commercial & Institutional HVAC Systems: Installed as the primary pre-filter in air handling units (AHUs) for office buildings, schools, hotels, and shopping malls. They protect the cooling coils and downstream bag or HEPA filters from large debris, reducing maintenance costs and energy consumption.
- Industrial Manufacturing & Workshops: In factories producing textiles, wood, food, or general goods, these filters capture coarse dust, lint, and fibers at the air intake, keeping ventilation systems running smoothly and improving indoor air quality for workers.
- Pre-Filtration for Critical Environments: In hospitals, laboratories, and cleanrooms, a G4 panel filter is the essential first stage before higher-grade F7, F9, or HEPA filters. It extends the life of these costly final filters by removing the bulk of particulate matter.
- Agricultural & Horticultural Facilities: Protects equipment and provides better air quality in greenhouses, poultry houses, and storage facilities by filtering out dust, pollen, and organic matter.
Why choose us?
✅10+ Years of Manufacturing Experience: Specialized in air filtration, with ISO9001 and other patent certifications.(About us)
✅ Factory Prices: Direct sales eliminate middleman markup-save up to 20% vs. distributors.
✅ Fast Customization: Tailored filters ready in 15-20 days; standard models ship within 7 days.
✅ Global Support:Our professional team provides 24-hour consulting and usually responds within 4 hours. We can also assist remotely with filter installation, debugging, and maintenance.(Contact Us)
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Frequently Asked Questions (FAQ)
Q: What is the main purpose of a G4 grade filter?
A: A G4 filter is designed as a pre-filter or primary filter. Its main job is to capture the larger particulate matter (like dust, sand, pollen, lint) from the air. This protects the more sensitive and expensive components downstream (like cooling coils and higher-efficiency final filters) and extends their lifespan significantly.
Q: Can you make filters to fit my non-standard air handler size?
A: Yes, absolutely. Custom sizing is one of our core strengths as a factory. Simply provide us with the exact dimensions (Length x Width x Depth) you need, and we will manufacture filters to fit perfectly, eliminating air bypass around ill-fitting panels.
Q: What is the advantage of the synthetic mesh on both sides?
A: The mesh provides critical reinforcement. It prevents the fibrous media from deforming under airflow pressure, stops fibers from being released into your ductwork, and makes the filter much more robust during handling, shipping, and installation.
Contact Us
Contact our foreign trade team for a quote, sample, or technical consultation:
📞 Phone: +86-18051750255;
✉️ Email:sales1@hzjfilter.com
🌐 Website:China Filter Part Manufacturers, Filter Suppliers, Purification Equipment Factory - HUAZHIJIE
