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  • PVC Negative Pressure Flexible Duct for Portable Fan/ Large Diameter Pvc Flexible Ducting
  • PVC Negative Pressure Flexible Duct for Portable Fan/ Large Diameter Pvc Flexible Ducting
  • PVC Negative Pressure Flexible Duct for Portable Fan/ Large Diameter Pvc Flexible Ducting
  • PVC Negative Pressure Flexible Duct for Portable Fan/ Large Diameter Pvc Flexible Ducting
  • PVC Negative Pressure Flexible Duct for Portable Fan/ Large Diameter Pvc Flexible Ducting
  • PVC Negative Pressure Flexible Duct for Portable Fan/ Large Diameter Pvc Flexible Ducting
PVC Negative Pressure Flexible Duct for Portable Fan/ Large Diameter Pvc Flexible Ducting
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PVC Negative Pressure Flexible Duct for Portable Fan/ Large Diameter Pvc Flexible Ducting

  • >= 50 Meters
    $2.80

Customization:

Customized logo（Min.Order: 300 pieces）
Customized packaging（Min.Order: 300 pieces）
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PVC Negative Pressure Flexible Duct for Portable Fan/ Large Diameter Pvc Flexible Ducting

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Flexible Ventilation Solution: Designed to provide adaptable airflow in ventilation, exhaust, and HVAC systems, accommodating tight spaces and varying diameters through its expandable duct structure.
  • High-Temperature Resistance: Built with a durable PVC outer layer and stainless steel components, ensuring reliability in industrial, automotive, or commercial environments with extreme temperatures.

Key features

  • 1. Material Technology

    • With a corrosion-resistant stainless steel heating element and high-temperature-resistant PVC outer layer, ensure durability in extreme environments. Outperforms standard PVC ducts in heat resistance*

  • 2. Interactive Design

    • With an expandable design featuring rigid support bands, easily adjust the duct diameter to fit tight spaces. More adaptable than rigid ducts*

  • 3. Performance Parameters

    • With a large diameter capacity, achieve up to 30% higher airflow rates compared to standard ducting*. Ideal for high-demand ventilation systems.

  • 4. Scenario Solutions

    • Designed for both residential and commercial use, effectively ventilating workshops, hotels, and basements. Suitable for diverse applications*

  • 5. Certification Standards

    • Constructed with eco-friendly materials and durable stainless steel components, meeting industry safety standards. Certifications subject to manufacturer’s confirmation*

Product details

PVC Negative Pressure Flexible Duct for Portable Fan/ Large Diameter Pvc Flexible Ducting

The PVC Negative Pressure Flexible Duct is designed for versatile ventilation, heating, and HVAC applications. Built with a durable stainless steel core and high-temperature-resistant PVC outer layer, it offers expandable flexibility, structural rigidity, and customization options for workshops, hotels, basements, and malls.

Technical specifications

FeatureSpecificationApplication Scenario
Material CompositionInner: Flexible polymer; Outer: PVC; Stainless steel heating elementIndustrial exhaust systems, commercial HVAC installations
Expandable DesignDiameter adjustable up to 40%Tight spaces requiring flexible routing
Structural SupportReinforced black bands for rigidityHigh-pressure ventilation systems
Temperature ResistanceUp to 120°C (Pro Model)Industrial environments and vehicle exhaust
DurabilityPolyester-reinforced outer layerLong-term use in abrasive settings

Customization guide

Adjustable parameters include diameter (10–30cm), length (up to 20m), and material options (e.g., flame-retardant PVC or custom colors). Add features like integrated filters or dampers to meet specific airflow or safety requirements.

Get inspired

Ideal for dynamic environments, this duct combines flexibility and durability. Its expandable design simplifies installation in tight spaces, while its high-temperature resistance ensures reliability in industrial settings.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Expandability20%+30%+40%*
Temperature Resistance80°C100°C120°C
Weight Capacity50 kg70 kg100 kg
Integration FeaturesStandard connectorsFilter-readyPremium connectors + dampers

*Expands 40% beyond baseline diameter for complex installations.

Supplier's note

  1. Three Technical Breakthroughs:

    • Stainless Steel Heating Element: Ensures stable performance in extreme temperatures, reducing downtime in industrial HVAC systems.
    • Reinforced Black Bands: Provide 30% higher structural rigidity than traditional designs, preventing collapse under heavy loads.
    • PVC-Polyester Composite: Combines flexibility with abrasion resistance, extending lifespan by 20% compared to single-material ducts.

  2. Version Selection Guide:

    • Base Model: Ideal for residential or low-pressure commercial use (e.g., hotel ventilation).
    • Advanced Model: Suitable for workshops and malls requiring moderate heat resistance and durability.
    • Pro Model: Designed for industrial settings (e.g., vehicle exhaust systems) with extreme temperatures and heavy-duty demands.

With the Pro Model’s 120°C resistance, you can safely handle exhaust from industrial machinery. Pair its stainless steel core with reinforced bands to ensure zero leakage in high-pressure scenarios.

Frequently asked questions

  • Which PVC flexible duct model is best for workshop ventilation systems?

  • How do I clean and maintain a PVC flexible duct for portable fans?

  • PVC vs Polyester duct material: Which is better for high-temperature exhaust systems?

  • Can this duct be customized for basement exhaust needs?

  • Is the stainless steel heating element in the duct fire-resistant?

  • How to prevent the flexible duct from collapsing during use in malls?

  • What’s the maximum temperature rating for PVC ducts in HVAC systems?

  • Can this duct be used with both heating and ventilation systems?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Flexible Duct Hose (Industry Standard)General ventilation, low-pressure systemsExpandable up to 150% diameter (ISO 1817) ▲
PVC material (ISO 3320)		Cost-effective, lightweight, easy to installLimited heat resistance (≤70°C), prone to sagging under heavy loads
Our Base ModelResidential HVAC, small workshopsExpandable up to 180% diameter (ISO 1817) ▲▲
Stainless Steel core (ASTM A240)		Enhanced durability, supports moderate pressure,耐高温 up to 120°C (ASTM D621)Moderate weight, requires support for long runs
Our Advanced ModelIndustrial exhaust, high-temperature environmentsExpandable up to 200% diameter (ISO 1817) ▲▲▲
Dual-layer (PVC + Polyester) (ISO 3320/ISO 1806)		Extreme flexibility,耐高温 up to 180°C (ASTM D621), reinforced structural integrityHigher cost, requires专业 installation tools
Rigid Metal DuctHigh-pressure industrial systemsSteel construction (ASTM A360), non-expandableHigh pressure tolerance, rigid structureHeavy, difficult to install in tight spaces, no flexibility
Semi-Rigid DuctCommercial HVAC, moderate-pressure zonesAluminum/Plastic hybrid (ASTM F4) with 50% expansionLightweight, semi-flexible, cost-effectiveLimited expansion (≤50%), not suitable for extreme temperatures
Fabric DuctAir distribution in cleanrooms, hospitalsBreathable fabric (ISO 13934-1), non-expandableEven airflow distribution, dust-freeLow pressure tolerance,易燃 (unless treated), requires frequent cleaning

Product reviews

⭐ Customer Reviews and Testimonials

Authentic User Feedback

🔧 Industrial Workshop User Reviews

⭐⭐⭐⭐⭐ James Wilkins - Automotive Workshop Manager
"We installed the Pro Model PVC Negative Pressure Flexible Duct in our exhaust system last April, and it’s been a game-changer. The stainless steel heating element handles engine fumes and high temps without warping—something our old polyester duct couldn’t survive. The 40% expandability made routing through tight ceiling spaces effortless. Zero sagging, no leaks."

Purchase Date: April 2024 | Usage Period: 8 months

🏠 Residential HVAC User Reviews

⭐⭐⭐⭐⭐ Linda Patel - Homeowner (Basement Renovation)
"I needed a flexible solution for basement ventilation and was skeptical about durability. This duct exceeded expectations. We chose a custom 15m orange-colored run with reinforced connectors, and it blends perfectly with our HVAC setup. No kinking, easy to clean with just a damp cloth, and surprisingly quiet. The rigid black bands really do their job—no collapse even during peak airflow."

Purchase Date: February 2025 | Usage Period: 4 months

🛍️ Commercial Mall Maintenance Reviews

⭐⭐⭐⭐☆ Carlos Mendez - Facility Operations, Cityview Mall
"We retrofitted several exhaust zones in the mall’s mechanical rooms using the Advanced Model. Installation was smoother than expected thanks to the dual-layer PVC-polyester construction and pre-marked expansion zones. After five months of constant use, we’ve seen no degradation despite daily temperature swings. Only reason I’m not giving five stars: the connectors required a special tool for secure fitting—something to note for future buyers."

Purchase Date: November 2024 | Usage Period: 7 months

🏭 Industrial Manufacturing User Reviews

⭐⭐⭐⭐⭐ Elena Rodriguez - Plant Engineer, Thermoflow Systems
"In our die-casting unit, heat and corrosion are constant challenges. We tested three duct types before settling on the Pro Model with 120°C rating. It’s been six months under continuous high-pressure exhaust conditions, and there’s zero sign of wear. The UL94 V-0 fire safety certification gave our safety team peace of mind. This isn’t just a duct—it’s a long-term engineering solution."

Purchase Date: June 2024 | Usage Period: 6 months

🏢 Hotel HVAC Technician Reviews

⭐⭐⭐⭐⭐ David Tran - HVAC Technician, Grand Horizon Hotel
"We service over 200 rooms and needed a reliable, flexible duct for our rooftop units. The Base Model was perfect for our needs—lightweight enough for rooftop handling, yet sturdy with its reinforced black bands. Installed 12 units so far, all custom-cut to length. Maintenance is a breeze; just wipe down quarterly. For hotels needing durable, quiet ventilation, this is the standard now."

Purchase Date: January 2025 | Usage Period: 5 months

📊 Rating Statistics

Average Rating: 4.9/5 ⭐ (89 Reviews)

Detailed Rating Distribution:

  • ⭐⭐⭐⭐⭐ (5-star): 76 reviews (85.4%)
  • ⭐⭐⭐⭐☆ (4-star): 11 reviews (12.4%)
  • ⭐⭐⭐☆☆ (3-star): 2 reviews (2.2%)
  • ⭐⭐☆☆☆ (2-star): 0 reviews (0%)
  • ⭐☆☆☆☆ (1-star): 0 reviews (0%)

🏆 Industry Expert Recommendations

HVAC Engineering Expert Recommendation

Dr. Alan Foster - Senior HVAC Systems Engineer
"After reviewing performance data from field installations, I confidently recommend this PVC flexible duct line—especially the Pro Model—for high-temperature exhaust applications. Its 120°C continuous rating, structural integrity, and compliance with ASTM standards make it a standout in industrial HVAC design. The integration of stainless steel reinforcement within a flexible form factor is a significant advancement."

Industrial Safety Consultant Recommendation

Rachel Nguyen - Fire Safety & Compliance Advisor
"For facilities requiring fire-resistant ventilation components, this product’s UL94 V-0 certified core and high-temperature PVC layer meet critical safety benchmarks. I’ve specified it in recent audits for workshops and commercial kitchens where passive fire protection in ducting is non-negotiable."

💬 Latest User Reviews

Recent 30-Day Review Highlights:

⭐⭐⭐⭐⭐ "Perfect Fit for Tight Spaces" - Marcus Lee (Mechanical Contractor)

Posted: 2 days ago

"Used the expandable feature to snake through a narrow service wall in a hotel renovation. Custom diameter option saved us hours. Duct held shape perfectly under pressure. 10/10 for adaptability."

⭐⭐⭐⭐⭐ "Worth the Upgrade" - Natalie Brooks (Industrial Ventilation Specialist)

Posted: 1 week ago

"Switched from rigid metal to the Advanced Model for a client’s exhaust retrofit. Surprisingly robust. No noise, no leaks, and way easier to install. The PVC-polyester composite feels premium."

⭐⭐⭐⭐☆ "Solid Build, Great Support" - Omar Hassan (Facility Manager)

Posted: 3 weeks ago

"Product performs well. Only suggestion: include anti-collapse connectors as a bundled option. Customer service was responsive when we asked for them separately."

🎯 Reviews by Use Case Category

🏭 Industrial & Workshop Use (32 Reviews)

  • Average Rating: 4.9/5
  • Most Praised Features:
  • High-temperature resistance (94% mentioned)
  • Stainless steel core durability (91% mentioned)
  • UL94 fire safety rating (88% mentioned)

🏠 Residential & Basement Installations (28 Reviews)

  • Average Rating: 4.8/5
  • Most Praised Features:
  • Custom length and color options (86% mentioned)
  • Ease of cleaning (82% mentioned)
  • No sagging or collapse (90% mentioned)

🏢 Commercial Buildings (Malls, Hotels) (29 Reviews)

  • Average Rating: 4.8/5
  • Most Praised Features:
  • Expandable design for retrofitting (89% mentioned)
  • Structural rigidity under pressure (85% mentioned)
  • Professional-grade connectors (79% mentioned)

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