4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts

Product Details
Material: Composite Material
Usage: for Air Conditioner
Application: Fire Resistance
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  • 4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts
  • 4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts
  • 4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts
  • 4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts
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  • Overview
  • Product Description
  • Production Line
  • Company Profile
Overview

Basic Info.

Shape
Round
Performance
Fire Resistance / Light Weight / Low Noise
Certification
ISO, CE
Temperature Range
-30°c to +150°c
Available Sizes
4 Inch to 20 Inch Diameter
Maximum Air Velocity
30 M/S
Packing
10PCS/Carton
Sample
Accept
Operating Pressure
up to 3000 PA
Transport Package
Carton
Specification
10M Length
Origin
Fujian, China
HS Code
39211390
Production Capacity
4500sqm/Day

Packaging & Delivery

Package Size
26.00cm * 16.00cm * 20.00cm
Package Gross Weight
1.600kg

Product Description


 
Product Description

Fiberglass Insulated Flexible Duct for HVAC Ventilation

The Fiberglass Insulated Flexible Duct is a high-performance solution for air distribution in HVAC ventilation systems, designed to provide effective thermal insulation, flexibility, and fire resistance. It consists of a durable inner aluminum duct, an intermediate layer of glass wool insulation, and a protective outer jacket made from aluminum foil.

4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts
4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts

This structure effectively reduces thermal loss, prevents condensation, and improves overall system efficiency in both residential and commercial HVAC applications.

Jacket:

Aluminum + Polyester Laminated (23-25 micron)

Insulation Wrap:

Fiberglass wool or polyester wrap (25/30mm thickness)

Density of Fiberglass Wool:

16kg/m³, 24kg/m³, 32kg/m³

Density of Polyester:

100g/m3-750gm3

Inner Duct:

Aluminum + Polyester, reinforced with a steel wire helix

Maximum Air Velocity:

30 m/s

Working Pressure:

Up to 3000 Pa

Temperature Range:

-30°C to 150°C

Ease of Cutting

No special tools required; easy to connect to ducting

Fire & Pressure Testing

Successfully tested for fire resistance and pressure

Flexibility

Can be bent in any direction (small bending radius)

Length

Standard length: 10 meters, customizable upon request

Space Saving

Compression ratio of 10:1

Installation

Easy installation, long service life; ideal for general-purpose exhaust applications

Duct Diameter

Steel Wire (mm)

Steel Wire Spacing (mm)

Carton Size for 10 Meters (mm)

4″ (102mm)

0.9

30

200×200×1010

5″ (125mm)

0.9

30

200×200×1010

6″ (152mm)

1.0

37

230×230×1010

6.5″ (165mm)

1.0

37

240×240×1010

7″ (180mm)

1.1

40

260×260×1010

8″ (203mm)

1.1

40

280×280×1010

10″ (254mm)

1.2

45

330×330×1010

12″ (305mm)

1.2

45

380×380×1010

12.5″ (315mm)

1.2

45

390×390×1010

14″ (355mm)

1.2

45

430×430×1010

16″ (405mm)

1.2

45

480×480×1010

18″ (455mm)

1.2

45

530×530×1010

20″ (505mm)

1.2

45

580×580×1010

 

Production Line

Comprehensive Range Of Insulated Flexible Ducts Insulated Flexible Duct

At GFI HVAC, we provide a comprehensive range of insulated flexible ducts, designed for various ventilation, air distribution, and thermal insulation needs in commercial, industrial, and residential HVAC systems.
4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts

Our product line includes multiple material configurations to meet specific requirements for flame resistance, mechanical strength, and installation environments.

4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts


We offer various models such as:

Layer Material Options Function
Inner Core Aluminum foil, PET film, PVC layer, or multi-combinations (e.g., Aluminum + PET) Provides smooth air conveyance, resists corrosion, and maintains vapor barrier
Insulation Fiberglass wool or Polyester fiber Delivers effective thermal insulation and acoustic reduction
Outer Jacket Metallized PET (VMPET), PVC film, reinforced aluminum foil, or laminated composites Offers fire protection, UV resistance, and moisture shielding
 
This design provides excellent thermal insulation, fire resistance, and moisture protection, making it ideal for energy-efficient HVAC applications in both residential and commercial environments.

Certifications & Standards

Our insulated flexible ducts meet various international quality and fire safety standards, including:

  • Class A2 fire resistance

  • EN13501-1 M0/M1 Rating

  • UL94 (Flame Retardancy)

  • ISO 9001:2015 certified production processes

4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts
GFI HVAC's flexible duct production facility spans 2400 square meters, equipped with 5 advanced production lines. Our products are widely distributed across more than 30 countries and regions, including the United States, Canada, Italy, Germany, New Zealand, Dubai, Japan, and South Korea.

4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts

Committed to continuous improvement and strict quality control, we have obtained ISO 9001 certification, passed national fire protection standards for building materials, and comply with international environmental regulations such as REACH.
 

4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts
4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts
4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts
4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts
4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts
4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts

In addition to flexible ducts, we also manufacture spiral ducts, supply and return air diffusers, as well as various duct accessories and fittings. For more information, please refer to our company profile or contact us directly.
4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts
4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts
4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts
Company Profile

Since 2011, GFI HVAC has been dedicated to the HVAC industry, beginning with galvanized duct (GI duct) and pre-insulated duct manufacturing. Over the past 13 years, we have steadily expanded our operations, establishing and investing in new production facilities to enhance our capabilities.

4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts
Today, GFI HVAC operates three duct production line(GI Duct, Spiral Duct, PID Duct) and a dedicated manufacturing site for air vents and dampers. Additionally, we have strategically invested in rubber insulation and flexible duct factories, further strengthening our ability to provide integrated solutions for HVAC projects.

4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts

Beyond factories and workers, we also have well-established trade and logistics departments. In business management, GFI HVAC values humanity and shared beliefs. We firmly believe that GFI HVAC is not just a manufacturer but a company driven by human-centric values and a strong collective vision.

4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts
GFI HVAC provides advanced HVAC solutions to hospitals, factories, airports, stadiums, commercial complexes, and engineering contractors in over 50 countries worldwide. Additionally, GFI actively participates in international HVAC exhibitions in China, Thailand, Vietnam, and beyond, staying at the forefront of industry trends and fostering deep collaborations with global clients.

At GFI, we are more than just a manufacturer-we are your partner in building a sustainable and efficient future. Let's innovate together and create global value!
 

4-20 Inch R8 Insulated Fiberglass Flexible Duct Ventilation AC Aluminum Flex Ducts

 

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