Heavy-Duty Cardboard Pre Air Filter for Commercial and Industrial HVAC Systems
Engineered strictly as a heavy-duty cardboard pre air filter, this product utilizes graded density synthetic media and a rigid V-pleat design reinforced with a galvanized steel wire grid to maximize dust-holding capacity while maintaining ultra-low initial resistance. Each pleated air filter cardboard frame is fully bonded with high-strength adhesive to eliminate any risk of air bypass, making it the ideal primary filtration choice to protect downstream high-efficiency bag filters and HEPA filters in office towers, manufacturing facilities, and industrial HVAC plants.
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Product Key Features
High Dust Holding Capacity: Designed with an optimized radial V-pleat geometry that drastically increases the effective surface area, allowing for maximum dust-loading and an extended service life.
Ultra-Low Pressure Drop: Delivers superior air filtration efficiency with minimal resistance to airflow, which lowers the workload on HVAC blowers and reduces facility energy consumption.
Excellent Structural Rigidity: Built with built-in diagonal support members and a heavy-duty frame design to prevent bowing, fluttering, or collapsing under high face velocity and variable air volumes (VAV systems).
Material & Craftsmanship
Premium Graded-Density Media: Features high-quality synthetic fiber filter media that utilizes depth-loading technology, trapping larger particles on the surface and finer particles deep within the blanket.
Double-Wire Mesh Reinforcement: The pleated media is laminated to a galvanized steel or aluminum wire grid on both sides, maintaining uniform pleat spacing and preventing media oscillation.
100% Perimeter Glue Bonding: The entire matrix of filtration media is continuously sealed to the inner walls of the cardboard frame using water-resistant polyurethane adhesive, ensuring zero air bypass.
Applications
Commercial HVAC Systems: Perfect as a reliable pre-filter in commercial office buildings, shopping malls, hotels, and educational institutions to maintain indoor air quality (IAQ).
Industrial Air Handling Units (AHUs): Extensively used for primary filtration in automotive paint spray booths, food processing facilities, and heavy industrial manufacturing plants.
Cleanroom Pre-Filtration: Serves as the essential first-stage intake protection to shield expensive secondary bag filters and terminal HEPA filters in electronics factories and pharmaceutical plants.
Competitive Comparison
| Feature Details | Chuqi Industrial Cardboard Filter | Standard Standard Filters |
|---|---|---|
| Frame Durability | Heavy-duty beverage board framed filter structure; resists moisture up to 100% RH. | Standard recycled cardboard; prone to sagging and warping under high humidity. |
| Air Bypass Protection | 100% continuous perimeter glue sealing ensures zero unfiltered air leakage. | Spot gluing or loose fitment; causes high air bypass around the edges. |
| Pleat Stability | Double-sided galvanized steel wire grid backing prevents pleat deformation. | Single-sided grid or paper string support; pleats flutter and collapse at high face velocity. |
| Size Customization | Flexible factory customization for both precise Actual Sizes and Nominal Sizes. | Only standard catalog sizes available; high minimum order quantities for custom sizes. |
Specifications
| Parameter Category | Specification Item | Technical Data & Industrial Standards |
|---|---|---|
| Basic Structure | Frame Material | High Wet-Strength Beverage Board (Moisture-Resistant Heavy Cardboard) |
| Filter Media | Premium Graded-Density Synthetic Fiber / Glass Fiber Blends | |
| Reinforcement | Double-Side Galvanized Steel Wire Mesh / Expanded Metal Grid | |
| Adhesive Bonding | 100% Perimeter Sealed with Water-Resistant Polyurethane Glue | |
| Available Thickness | 1 Inch (1″) / 2 Inch (2″) / 4 Inch (4″) | |
| Performance & Efficiency | MERV 8 Efficiency Rating | Particle Size 3.0–10.0 µm ≥ 70% | Initial Resistance: ≈ 0.20–0.25 in.w.g. (50–62 Pa) |
| MERV 11 Efficiency Rating | Particle Size 1.0–3.0 µm ≥ 65% | Initial Resistance: ≈ 0.30–0.35 in.w.g. (75–87 Pa) | |
| MERV 13 Efficiency Rating | Particle Size 0.3–1.0 µm ≥ 50% | Initial Resistance: ≈ 0.40–0.45 in.w.g. (100–112 Pa) | |
| Operation Limits | Max. Temp / Humidity | ≤ 180°F (82°C) | 100% RH (Relative Humidity) Max. |
| Final Resistance | Recommended replacement at 1.0 in.w.g. (250 Pa) | |
| Standard Dimensions | 16 x 20 x 1″ (Nominal) | Actual Size: 15.5 x 19.5 x 0.75″ (394 x 495 x 19 mm) | Airflow: 1100 CFM |
| 16 x 25 x 1″ (Nominal) | Actual Size: 15.5 x 24.5 x 0.75″ (394 x 622 x 19 mm) | Airflow: 1400 CFM | |
| 20 x 20 x 1″ (Nominal) | Actual Size: 19.5 x 19.5 x 0.75″ (495 x 495 x 19 mm) | Airflow: 1400 CFM | |
| 24 x 24 x 2″ (Nominal) | Actual Size: 23.38 x 23.38 x 1.75″ (594 x 594 x 44 mm) | Airflow: 2000 CFM | |
| Customization & Info | OEM/ODM Capabilities | Full support for custom actual sizes, non-standard thickness, private labeling/branding. |
| Environmental Disposal | 100% Recyclable & Incinerable options available for sustainable green building standards. |
Chuqi New Materials stands as a premier air filtration manufacturer backed by 20 years of professional factory production experience in the ventilation industry. Our state-of-the-art manufacturing facility features advanced production capabilities that guarantee high-capacity output and stable lead times for global B2B supply. All products are manufactured under strict quality management protocols and meet certified MERV standards, ensuring rigorous primary filtration and reliable intake protection for large-scale commercial and industrial HVAC systems. By partnering with us, industrial contractors and facility managers gain direct factory pricing, precise American Nominal-to-Actual size matching, and a dependable supply chain that minimizes system downtime and protects expensive downstream filtration components.
Frequently Asked Questions
Q1: How does your factory handle American Nominal vs. Actual Sizes for bulk wholesale orders?
A: We ensure a flawless glide into standard HVAC slots by strictly converting American Nominal Sizes (e.g., 24 x 24 x 2 inches) to precision US Actual Sizes (e.g., 23.38 x 23.38 x 1.75 inches) during manufacturing. For non-standard dimensions, our technical team provides exact custom dimensioning to prevent any installation or air bypass issues on site.
Q2: Can your pleated air filter cardboard frame handle high humidity levels?
A: Yes. Unlike regular papercraft filters, we utilize high wet-strength moisture-resistant beverage board for our frames. When combined with our water-resistant polyurethane adhesive matrix, the entire disposable HVAC panel filter maintains its structural integrity without warping, even under 100% relative humidity.
Q3: Which MERV ratings do you offer for your commercial air filtration products?
A: We manufacture this specific cardboard pre air filter series in MERV 8, MERV 11, and MERV 13 configurations. This allows commercial facility managers to choose the optimal balance between particle filtration efficiency and system pressure drop.
Q4: How does this pre-filter help extend the lifespan of our terminal HEPA filters?
A: This panel filter acts as the first line of defense in your HVAC plants. By capturing up to 70%–90% of larger airborne particulates (like dust, lint, and pollen) at a low initial resistance, it prevents the terminal high-efficiency bag filters or HEPA filters from clogging prematurely, reducing overall replacement costs.
Q5: What are your factory’s customization capabilities for wholesale B2B orders?
A: As a direct global air filtration manufacturer, we offer full OEM/ODM services. This includes custom non-standard physical sizes, variable frame thicknesses, personalized edge branding/labeling, and specialized media blends tailored to specific industrial ventilation cleanrooms.
