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Help CenterPolyester Flange-Clamp Air Filter for HVAC System G3/G4 Pre-Filter
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Welcome to Anping County Boli Hardware Wiremesh Products Factory – your trusted manufacturer of high-performance filtration solutions since 1998. Our Polyester Flange-Clamp Air Filter for HVAC System G3/G4 Pre-Filter is designed to deliver reliable, cost-effective air purification for commercial and industrial HVAC systems. With over two decades of manufacturing experience and annual export value exceeding US$5 million, we are proud to offer this product that combines durable polyester media with a robust flange-clamp frame, ensuring easy installation and long service life. Whether you need to protect downstream equipment or improve indoor air quality, this pre-filter is the ideal first line of defense.
Product Overview
This air filter is specifically engineered for HVAC systems requiring G3 or G4 pre-filtration according to EN 779 / ISO 16890 standards. The polyester media provides excellent dust-holding capacity while maintaining low airflow resistance, which helps reduce energy consumption. The flange-clamp frame design allows for quick and secure mounting in standard filter banks without the need for additional tools.
Key Features & Benefits
- High-Quality Polyester Media – Made from non-woven polyester fibers, providing stable filtration efficiency and resistance to moisture and chemicals.
- G3/G4 Filtration Class – Suitable for capturing coarse dust, pollen, and lint particles, extending the life of fine filters downstream.
- Robust Flange-Clamp Frame – Galvanized steel or aluminum frame with integral gasket ensures airtight sealing and easy replacement.
- Low Pressure Drop – Optimized media pleating reduces energy costs while maintaining consistent airflow.
- Customizable Dimensions – Available in standard sizes or custom-made to fit your specific HVAC duct dimensions.
- Environmentally Friendly – The media can be incinerated or recycled after use, reducing landfill waste.
Technical Specifications
| Parameter | Value |
|---|---|
| Media Material | 100% Polyester non-woven |
| Filtration Class | G3 (EN 779) / ISO Coarse 40% |
| Frame Material | Galvanized steel or aluminum (customizable) |
| Max Operating Temperature | 70°C (158°F) |
| Recommended Air Velocity | 2.5 m/s (500 fpm) typical |
| Initial Pressure Drop (G4) | ~30 Pa at rated flow |
| Dust Holding Capacity (G4) | ~250 g/m² (at terminal pressure drop) |
Why Choose Our Polyester Flange-Clamp Air Filter?
- Factory Direct Pricing – Eliminate middlemen costs with our manufacturer-to-buyer supply chain.
- Consistent Quality – Every filter undergoes strict production control to ensure uniform pleating and frame integrity.
- Fast Delivery – Stocked in multiple sizes; custom orders typically ship within 15–20 days.
- Global Shipping – Ship from Tianjin, Qingdao, Shanghai, or Foshan ports to destinations worldwide.
- Bulk Packaging Options – Available in individual poly bags, cartons, or pallet packaging.
Trust & Reliability
Anping County Boli Hardware Wiremesh Products Factory has been a reliable partner for international clients across North America, South America, Europe, Southeast Asia, Africa, and the Middle East for over 25 years. With an annual export value of US$5–10 million, we have earned a reputation for delivering products that meet stringent quality requirements. Our experienced team provides technical support, sample testing, and customized solutions to match your specific HVAC system needs. Choose us for a filter that combines durability, efficiency, and economy. Contact us today for a quote or to request free samples.
Frequently Asked Questions
A: G3 captures coarse particles (≥10 µm) with average efficiency of 80–90%, while G4 captures finer particles (≥1 µm) with higher efficiency. Both are suitable for pre-filtration; G4 offers better protection for downstream fine filters.
A: No, the polyester media is disposable and not designed for washing. Replacement is recommended when pressure drop reaches the terminal value (typically 250 Pa or as specified).
A: Standard sizes include 24x24x2, 20x20x2, 12x12x2 inches, etc. Custom sizes up to 2000x1000mm can be produced upon request.
A: Yes, the flange design is compatible with standard HVAC filter holding frames. The integral gasket ensures a tight seal.
A: The polyester media can withstand continuous operating temperatures up to 70°C (158°F). For higher temperatures, please inquire about special materials.
A: For standard sizes, we ship within 7–10 days. Custom orders typically require 15–20 days after sample approval.
A: Yes, the polyester media is inert and non-shedding, making it suitable for general ventilation in food processing environments. However, for specific food safety standards, please consult our technical team.
A: Yes, we provide free samples for quality evaluation. The buyer covers shipping costs. Contact us for sample requests.
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