Moisture-Resistant Beverage Board Framed Filter with Pleated Cardboard Frame
Specially engineered to withstand heavy A/C condensation without warping, this rugged pleated air filter cardboard frame features an advanced high wet-strength moisture-resistant cardboard and a continuous double-wall perimeter frame bonded with water-resistant polyurethane adhesive. Its optimized radial V-pleat design maximizes the effective surface area for stable air filtration, delivering certified MERV 8, MERV 11, and MERV 13 efficiency levels without structural failure in demanding outdoor rooftop air handling units (AHUs) and tropical climate HVAC installations.
Need a Custom Quote or Free Material Samples?
CHUQI delivers high-performance, custom OEM/ODM solutions tailored to your specifications. Contact us today to access factory-direct pricing, custom dimensions/efficiencies, and free sample support!
Product Key Features
Outstanding Moisture Resistance: Engineered specifically for humid environments, maintaining excellent structural rigidity under 100% relative humidity without softening, expanding, or losing shape.
Anti-Warping & Anti-Sagging: The heavy-duty frame withstands heavy moisture and air conditioner condensation, preventing the filter media from sagging or collapsing under high static pressure.
High Face Velocity Stability: Reinforced with heavy-duty structural cross-members on both sides to prevent bending, twisting, or fluttering in Variable Air Volume (VAV) systems.
Material & Craftsmanship
High Wet-Strength Beverage Board: Constructed using premium-grade, moisture-resistant beverage board papercraft, which provides significantly higher wet tensile strength than standard cardboard.
Water-Resistant Polyurethane Bonding: The filtration media is continuously sealed to the inner frame using specialized water-resistant polyurethane adhesive, creating a 100% leak-proof perimeter that eliminates unfiltered air bypass.
Precision Radial V-Pleating: Laminated with a rust-resistant galvanized steel wire grid to guarantee uniform pleat spacing and maximize the aerodynamic dust-holding capacity in wet climates.
Applications
Rooftop Air Handling Units (AHUs): Ideal as a dependable pre-filter for outdoor rooftop units exposed to rain, fog, high humidity, and changing weather conditions.
Tropical & Coastal HVAC Installations: Perfect for commercial ventilation systems located in coastal regions or tropical climates where high relative humidity is constant.
Industrial Kitchens & Food Processing: Provides reliable primary air filtration in environments with higher moisture levels and steam generation before air reaches secondary filters.
Competitive Comparison
| Feature Details | Chuqi Beverage Board Filter | Standard Cardboard Filters |
| Moisture Resistance | Built with premium high wet-strength beverage board framed filter material; remains rigid up to 100% RH. | Uses standard recycled cardboard; quickly softens, expands, and warps in high humidity. |
| Frame Rigidity | Double-wall frame with specialized structural cross-members; zero sagging under heavy A/C condensation. | Lacks heavy reinforcement; frame bows easily under high static pressure and wet conditions. |
| Adhesive Matrix | 100% perimeter sealed with water-resistant polyurethane glue; glue will not dissolve or leak. | Sealed with basic hot-melt glue; adhesive bonds can fail or peel off when exposed to constant moisture. |
| Pleat Alignment | Laminated to a rust-resistant galvanized wire grid; maintains perfect V-pleat geometry when wet. | Uses non-treated metal or paper strings; pleats collapse and stick together, blocking airflow. |
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. |
At Chuqi, product quality and structural integrity under demanding environments are our highest priorities. Our specialized beverage board framed filter line is engineered using premium high wet-strength cardboard and water-resistant polyurethane adhesive matrixes, designed to withstand high relative humidity without warping or collapsing. We enforce a rigorous quality inspection protocol to ensure zero air bypass, fully complying with global environmental and ventilation efficiency benchmarks. For B2B distributors and procurement officers sourcing for coastal, tropical, or high-condensation rooftop air handling units (AHUs), Chuqi delivers an uncompromising moisture-proof solution that eliminates product failure complaints, lowers structural replacement costs, and protects your brand reputation in premium markets.
Frequently Asked Questions
Q1: How does your factory guarantee the cardboard frame will not collapse in high humidity or rainy climates?
A: We use high wet-strength beverage board framed filter technology instead of standard recycled papercraft. Combined with water-resistant polyurethane adhesive, our frames maintain full structural tensile strength and rigidity even under 100% relative humidity and heavy moisture exposure.
Q2: What MERV efficiency ratings are available for your moisture-resistant filter line?
A: Our factory supplies this moisture-proof series in MERV 8, MERV 11, and MERV 13 efficiencies. All levels are engineered with robust radial V-pleats to ensure a low pressure drop and stable air filtration performance in tropical or coastal environments.
Q3: Can we customize the frame thickness and outer dimensions for non-standard outdoor AHUs?
A: Yes, absolutely. As a direct global air filtration manufacturer, we specialize in factory customization. We can custom-engineer the beverage board thickness, add specific structural cross-members, and cut exact actual dimensions to fit any unique rooftop air handling unit (AHU).
Q4: Does the water-resistant adhesive emit any chemical odors or VOCs in commercial HVAC slots?
A: No. The specialized water-resistant polyurethane glue we use is fully cured during factory production. It is completely odorless, non-toxic, and chemically stable up to its maximum operating temperature of 180 degrees Fahrenheit (82 degrees Celsius).
Q5: What is the wholesale ordering process and packaging option for humid-region distributors?
A: We provide flexible direct wholesale supply with sea-freight optimized packaging. To protect the cardboard filters from ocean moisture during transit, all bulk orders are packed in heavy-duty master cartons with internal moisture-proof plastic polybags, and we offer full support for your private logo branding on the frame.
