Custom Replacement Filter – Your Go-To Pre-Filter for Longer-Lasting Purification
Tired of swapping out expensive hepa filters every 2 months because they're clogged with hair,lint,or big dust particles?Our custom paper-frame replacement filter is the fix.It's a lightweight,eco-friendly pre-filter that catches large contaminants before they reach your main filter-slashing your maintenance costs.Built with a recyclable paper frame and durable folded green-white cotton,it's fully customizable to fit any small-to-medium air purifier,desktop HVAC,or niche ventilation system.
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Basic Information
| Brand Name | Huazhijie | Product Name | Replacement Ac Filter |
| Frame Material | Recyclable Kraft Paper (Thickness: 1–2mm) | Filter Media | Green-White Folded Polyester Cotton |
| Filtration Efficiency | G3/G4/Custom | Dimensions | Custom |
| Initial Air Resistance | ≤40Pa (at 150m³/h-no airflow blockage) | Dust Holding Capacity | 120–180g/m² (lasts 1–3 months) |
| Operating Temperature | -20°C to 75°C | Maximum Humidity | 70% RH |
| OEM | Yes | Certifications | ISO 9001 |
Why This Filter Saves You Time & Cash
1. Eco-Friendly Paper Frame: Light, Cheap, & Recyclable
No Heavy Lifting: The thin, rigid paper frame is light enough to swap with one hand (even for tight purifier slots).
Budget-Friendly: Paper cuts material costs, so this pre-filter is way cheaper than replacing your main HEPA filter.
Recycle When Done: The paper frame is 100% recyclable-win for eco-conscious homes/businesses.
2. Green-White Folded Cotton: Tough on Big Contaminants
This dual-colored folded cotton media is built for pre-filtration:
Green Side (Dense): Catches larger particles (hair, lint, pet dander, food crumbs) to keep your main filter clean.
White Side (Fine): Traps smaller dust particles (≤5μm) for extra pre-protection.
Folded Design: Maximizes surface area, so it holds 2x more debris than flat cotton filters (lasts 1–3 months per use).
3. 100% Customizable (We Build It for Your Device)
Suitable for These Scenarios
Hospital Patient Rooms: Pre-filtration for air handling units
Dental Clinics: Protection of dental equipment from dust
Medical Laboratories: Basic particulate control in ventilation systems
Pharmacy Storage Areas: Maintaining clean air in medication storage
Office HVAC Systems: Pre-filters for main air handling units
Hotel Guest Rooms: Individual room ventilation units
Shopping Malls: Central air system pre-filtration
Restaurant Kitchens: Grease and dust pre-filtration
Electronics Manufacturing: Cleanroom pre-filtration stages
Food Processing: Basic air filtration in production areas
Warehouse Ventilation: Dust control in storage facilities
Packaging Facilities: Product protection from airborne particles
Classroom Ventilation: Improving indoor air quality for students
University Laboratories: Basic fume hood pre-filtration
Library Air Systems: Protecting books and documents from dust
Gymnasium Ventilation: Air quality management in sports facilities
Apartment Building HVAC: Central ventilation system pre-filters
Smart Home Systems: Integrated air purification units
Basement Ventilation: Moisture and dust control
Allergy-Sensitive Homes: Basic allergen filtration
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 efficiency grades are available?
A: We offer G3 (80-90% efficiency) and G4 (90-95% efficiency) as standard, with other grades available for custom orders.
Q: Are these filters washable?
A: No, these are disposable filters. Washing will damage the media structure and reduce filtration efficiency.
Q: Can you provide custom branding?
A: Absolutely! We can add your logo or brand information to the filter frame for OEM orders.
