“Air Ventilator Black”

$146.50$550.50
Some Sizes Out of Stock Temperature Range: -20°F to +180°F Sizes I.D. (in.): 4, 6, 8, 10, 12, 14, 16, 18, 20, & 24

“Air Ventilator Heavy-Duty”

$183.50$597.50
Temperature Range: -20°F to +180°F Sizes I.D. (in.): 6, 8, 12, 14, 16, & 24

“Air Ventilator Yellow”

$146.50$550.50
Temperature Range: -20°F to +180°F Sizes I.D. (in.): 4, 6, 8, 10, 12, 14, 16, 18, 20, & 24

“Air Ventilator White”

$146.50$550.50
Temperature Range: -20°F to +180°F Sizes I.D. (in.): 4, 6, 8, 10, 12, 14, 16, 18, 20, & 24

“Urethane Flex Medium-Duty”

$252.13$2,250.75
Temperature Range: -65°F to +225°F Sizes I.D. (in.): 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 22, & 24

“Air Ventilator Insulated”

$542.00$918.00
Some Sizes Out of Stock Temperature Range: -20°F to +180°F Sizes I.D. (in.): 8, 12, 14, & 16

“Thermoplastic Flex Medium-Duty WS”

$73.75$1,915.75
Temperature Range: -40°F to 275°F. Sizes I.D. (in.): 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 22, & 24

“Urethane Flex Light-Duty”

$152.88$1,977.00
Temperature Range: -65°F to +225°F Sizes I.D. (in.): 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 12, 14, 16, & 18

“Urethane Flex Heavy-Duty”

$338.13$2,908.25
Some Colors are Out of Stock Temperature Range: -65°F to +225°F Sizes I.D. (in.): 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 22, & 24

“Thermoplastic Flex Medium-Duty”

$131.50$1,737.75
Lead Time 4-6 Weeks Temperature Range: -40°F to 275°F. Sizes I.D. (in.): 1.5, 1.75, 2, 2.25, 2.5, 3, 3.5, 4, 5, 6, 7, 8, 10, 12, 14, 16, 18, 20, & 24

“Wind Handler WS”

$378.25$12,843.88
Lead Time 4-6 Weeks Temperature Range: -65°F to +250°F Sizes I.D. (in.): 4, 5, 6, 7, 8, 10, 12, 14, 16, 18, 20, 24, 28, 30, 36, 40, 42, 48, & 52

“Wind Handler Insulated TU”

$628.40$10,584.06
Lead Time 4-6 Weeks Temperature Range: -40°F to +250°F Sizes I.D. (in.): 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 28, 30, 36, & 40

“Wind Handler”

$324.25$2,855.00
Lead Time 4-6 Weeks Temperature Range: -65°F to +250°F Sizes I.D. (in.): 4, 5, 6, 7, 8, 10, 12, 14, 16, 18, 20, & 24

“Urethane Flex Static Dissipative”

$502.90$4,636.00
Lead Time 4-6 Weeks Temperature Range: -65°F to +225°F Sizes I.D. (in.): 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, & 12

“Urethane Flex Self Extinguishing”

$360.50$2,787.00
Lead Time 4-6 Weeks Temperature Range: -65°F to +225°F Sizes I.D. (in.): 2, 2.5, 3, 4, 5, 6, 8, 10, & 12

“Urethane Flex Extra Heavy-Duty”

$519.40$3,101.25
Lead Time 4-6 Weeks Temperature Range: -65°F to +225°F Sizes I.D. (in.): 4, 5, 6, 8, 10, 12, 14, 16, & 18

“Tornado Flex Insulated AD”

$616.00$7,086.06
Lead Time 4-6 Weeks Temperature Range: -20°F to +180°F Sizes I.D. (in.): 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 24, 28, 30, 36, & 48

“Tornado Flex In Sack”

$448.17$1,501.93
Lead Time 4-6 Weeks Temperature Range: -20°F to +180°F Sizes I.D. (in.): 6, 8, 10, 12, 14, 16, 18, 20, & 24

“Tornado Flex”

$292.25$8,058.88
Lead Time 4-6 Weeks Temperature Range: -20°F to +180°F Sizes I.D. (in.): 4, 5, 6, 7, 8, 10, 12, 14, 16, 18, 20, 24, 28, 30, 36, 40, 42, & 48

“Neoprene Flex – 2 ply WS”

$320.40$2,607.50
Lead Time 4-6 Weeks Temperature Range: -40°F to +250°F Sizes I.D. (in.): 3, 4, 5, 6, 7, 8, 10, & 12

“Neoprene Flex – 2 ply Heavy-Duty”

$386.00$3,662.50
Lead Time 4-6 Weeks Temperature Range: -40°F to +250°F Sizes I.D. (in.): 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 22, & 24

“Neoprene Flex – 2 ply”

$256.20$12,813.63
Lead Time 4-6 Weeks Temperature Range: -40°F to +250°F Sizes I.D. (in.): 1, 1.25, 1.5, 1.75, 2, 2.25, 2.5, 2.75, 3, 3.5, 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 22, 24, 28, 30, 36, 40, 42, & 48

“Neoprene Flex – 1 ply”

$288.25$1,668.00
Lead Time 4-6 Weeks Temperature Range: -65°F to +250°F Sizes I.D. (in.): 1.5, 1.75, 2, 2.25, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, & 12

Aluminum Connectors

$21.15$69.99
Sizes I.D. (in.): 1.5, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 18, 20, & 24

Screw Clamps

$9.20$435.97
Sizes I.D. (in.): 1.5, 1.75, 2, 2.25, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 12, 14, 16, 18, & 20

Bridge Clamps

$8.29$21.19
Sizes I.D. (in.): 2, 2.25, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, & 12

J-Lock Connectors

$46.20$70.91
Sizes I.D. (in.): 4, 5, 6, 8, 10, 12, 14, 16, 18, & 20

What Is Considered a Large Diameter Hose?

A large diameter hose is a wide hose designed to accommodate large air ventilation usually in commercial sites. The term “large diameter” refers to flexible hoses with an inside diameter (ID) range of 16” to 52”, and any sizes within that range that maybe be customized when ordered. Heavy-duty applications such as agricultural, chemical processing, construction, mining, and heavy-duty air ventilation require a large diameter hose to get the maximum output from the machinery. HVAC military systems also require large ventilation machinery since they have portable and vehicle-mounted systems that can be installed in military tents field hospitals and displaced persons camps. Blowers are used to cool down equipment and machinery so that the equipment is revamped for use immediately. While there are many industrial applications for a large hose, there are also many commercial applications for these flex hoses, such as humidity control and general utility ventilation.

Large Diameter Hose

air ventilator black diameter showing

How To Measure Ductwork

How Are Hose Diameters Measured?

The inside diameter (ID) is the measurement of a straight line from one point of a flex hose’s inner wall, through its center, and to the opposite inner wall. It should not be confused with the outside diameter (OD), which is the measurement of a straight line from the outside edge of a flex hose across the center and to the opposite outer edge. The outside diameter also takes into account the wall thickness of a hose and this adds to the overall size. Since duct hoses are fit over a pipe, their inside diameter is what matters during installation. Ductwork is pulled over a pipe and is installed using clamps or other mechanical implements.
Academically, diameter is defined as twice the length of the radius of a circle. The radius is measured from the center of a circle to one endpoint on the boundary of the circle. The distance of diameter is measured from one end of the circle to a point on the other end of the circle, passing through the center. A common misconception when measuring flex hoses is that the best way to measure them is by finding their circumference. Circumference refers to the enclosed boundary of the circle. The main reason why measuring the circumference of a flexible hose is an inefficient means is because it only refers to the distance of the outside perimeter of a flexible hose and doesn’t account for the channel size of the flex hose where air, fumes, and materials flow through. If you measure a duct or a flex hose by its circumference, you risk purchasing a large diameter flexible hose that does not fit the channel size of your machinery and ventilation system. Since inside diameter of the hose fits over the outside diameter of a pipe, these two dimensions must be equal. An 8-inch inside diameter hose fits over an 8-inch outside diameter pipe.

“Thermoplastic Flex Medium-Duty WS”

Thermoplastic Flex Medium WS black and yellow coiled

“Neoprene Flex – 2 Ply Heavy-Duty”

  • Neoprene and nylon construction offers excellent abrasion resistance and superior flex life
  • Handles both positive and negative pressure
  • Additional coatings available for better abrasion &/or chemical resistance

The “Neoprene Flex – 2 ply HD” is a heavy-duty hose recommended for light bulk material handling applications. Each flexible duct is made from double-ply neoprene coated polyester fabric, making for a thick walled hose that offers excellent flexibility. The material handling hose is then reinforced with a spring steel wire helix. This flexible hoses spiral design is made to withstand abrasive dust and other harsh materials. The neoprene and polyester construction of the “Neoprene Flex – 2 ply HD” offers superior abrasion resistance and excellent flex life. Neoprene resists degradation more than natural or other synthetic rubbers. This relative inertness makes it well suited for demanding applications.

The material transfer ducts have a high strength to weight ratio that is augmented by excellent flow characteristics. The “Neoprene Flex – 2 ply HD” material handling hose can handle both positive and negative pressure and has a working temperature range from -40 to +250 degrees Fahrenheit. This hose can be ordered with an external wear-strip in cases where abrasion on the exterior of the hose is possible. Also, an additional neoprene coating can be added for better abrasion and chemical resistance. The additional coating and added wear-strip can extend the life of this material handling hose in demanding environments.

“Air Ventilator Heavy-Duty”

$183.50$597.50
Temperature Range: -20°F to +180°F Sizes I.D. (in.): 6, 8, 12, 14, 16, & 24

“Air Ventilator Orange”

$146.50$550.50
Some Sizes Out of Stock Temperature Range: -20°F to +180°F Sizes I.D. (in.): 4, 6, 8, 10, 12, 14, 16, 18, 20, & 24

“Air Ventilator Yellow”

$146.50$550.50
Temperature Range: -20°F to +180°F Sizes I.D. (in.): 4, 6, 8, 10, 12, 14, 16, 18, 20, & 24

“Air Ventilator White”

Air Ventilator White Coil
Air Ventilator White Flex

Poly Fabric Air Ventilator Flex Ducts

The Poly Fabric Air Ventilators are a popular option for large hose work because of their highly compressible design, availability, and easy-to-install nature. Air Ventilator hoses are designed to transfer large air volumes from one point to another effectively, but these flexible ducts are also built to withstand a working temperature range of -20 to +180 degrees Fahrenheit. As a result, these flex hoses are great for any commercial or industrial application that involves extreme temperatures for long periods. Coming with a standard length of 25 feet, Poly Fabric Air Ventilators all come with belted cuffed ends, making them easy to fit and install to various machinery and applications. Depending on your work environment, these flexible hoses can be easily stored and transported. On top of it all, Poly Fabric Air Ventilators come in different colors, wall thicknesses, and inside diameters (ID), making them great when deciding the appropriate flex hose for your large hose work.

“Air Ventilator Black”

  • Wearstrip offers external abrasion resistance
  • Very cost effective

“Air Ventilator Black” flexible ducting is recommended for industrial air movement applications. The lightweight hose made from a durable PVC vinyl coated polyester fabric that has been reinforced with a spring steel wire helix for added strength and flexibility. The black flex ducting comes with a protective external wear-strip. The black wear-strip prevents the hose from prematurely wearing due to repeatedly being dragged across the ground.

This commercial hose comes in standard 25 ft lengths with belted cuffed ends for easy installation. This removes the need for clamps or connectors, since hoses can effectively be belted onto pipes. The PVC coated flex ducting is lightweight, compressible and cost effective. This hose has a 9-to-1 compression ratio which means a 9 foot section of hose will compress into 1 foot. This allows for easy handling and storage when the hose is not in use. The retractable nature of the hose also allows for easy transportation and convenient storage in migratory applications.

“Air Ventilator Black” flexible ducting has a working temperature range from -20 to + 180 degrees Fahrenheit. Each commercial hose is sold in 25 ft lengths. With the wear-strip providing substantial abrasion resistance, the lightweight hose is perfect for blower applications. The “Air Ventilator Black” is available in internal diameter sizes of 4, 6, 8, 10, 12, 16, 18, 20 and 24 inches.

J-Lock Connectors

$46.20$70.91
Sizes I.D. (in.): 4, 5, 6, 8, 10, 12, 14, 16, 18, & 20

Aluminum Connectors

$21.15$69.99
Sizes I.D. (in.): 1.5, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 18, 20, & 24

“Tornado Flex”

$292.25$8,058.88
Lead Time 4-6 Weeks Temperature Range: -20°F to +180°F Sizes I.D. (in.): 4, 5, 6, 7, 8, 10, 12, 14, 16, 18, 20, 24, 28, 30, 36, 40, 42, & 48

“Tornado Flex In Sack”

$448.17$1,501.93
Lead Time 4-6 Weeks Temperature Range: -20°F to +180°F Sizes I.D. (in.): 6, 8, 10, 12, 14, 16, 18, 20, & 24

Custom Size Large Diameter Tornado-Flex Ducting

When discussing large diameter hoses and ducts, the Tornado-Flex Ducting is an excellent option for their customization, wide range of applications, and overall durability. Designed to move large volumes of air, these flexible ducts suit a range of industrial and military applications. Made from PVC-coated polyester fabric and reinforced with a spring steel wire helix, Tornado-Flex Ducts are durable in their flame-retardant design and resist many external factors such as abrasion and drag. Due to their customizable nature, you can alter the Tornado-Flex Ducts in any number of ways, from inside diameter (ID) sizes that can go up to as high as 52-inch to choosing a multitude of color options such as olive drab, desert tan, blue, and white. Depending on your application and requirements, insulation options are also available for Tornado-Flex Ducts, which ensure that any high-volume air flow is transferred with its temperature maintained from one end of the ductwork to the other.

“Tornado Flex Insulated AD”

  • Ideal use for permanent and mobile air conditioning units
  • PVC material resists ozone, UV rays, and moisture
  • Compressibility allows for convenient storage

The “Tornado Flex Insulated AD” is an insulated hose made from two single-ply PVC coated yellow polyester fabric ply protecting insulation barrier, covered with an external wear-strip and reinforced with a spring steel wire helix. This makes for a hose that is both insulated and very durable, a unique characteristic of this product. In addition to its resilience, this flexible air duct exhibits excellent flexibility, allowing it to be used in tight or unusual installations. Unlike other rigid insulated products, this hose can easily make bends and turns in tight cramped spaces. The insulation and external abrasion resistance make this UV resistant hose ideal for permanent and mobile air conditioning units.

This UV resistant hose is constructed from flame retardant materials for added safety. The insulation and use of flame retardant materials make this flexible air duct a great choice for air movement applications in highly sensitive areas. PVC is an inherently fire resistant plastic, the only exception among the general-purpose plastics, since it contains more than 50% of chlorine. When PVC products are burned, hydrogen chloride gas resulting from thermal cracking slows down the continuous combustion reaction and prevents burning progress by warding off the PVC product surface from oxygen in the air.

“Wind Handler Insulated TU”

Wind Handler Insulated TU
Wind Handler Funnel Cuff yellow in color pointing left

Wind Handler Flexible Ducting

Similarly, to the Tornado-Flex Ducts, Wind Handlers is a sturdy, reliable option for any large diameter ducting that can be customized in a plethora of ways depending on your application and requirements. Wind Handlers are made from a neoprene-coated polyester fabric, and due to the polymerization of chloroprene of neoprene, Wind Handlers exhibit high tensile strength that is much more resistant to abrasion, drag, chemicals, and fumes and can flex and compress without causing damage to the hose wall. Due to this design, these flexible ducts can withstand extreme temperatures of up to 250 degrees Fahrenheit for long periods. Additionally, Wind Handlers also come with a range of customization options such as inside diameter (ID) sizes that can go up to 52” to insulation options that can maintain any temperature as it is being transferred from one point of the duct to the other. As a result, Wind Handlers are perfectly designed to handle large diameter hose work and ventilation.

“Wind Handler”

Wind Handler Yellow in Color flexed

“Wind Handler WS”

  • Ideal for moving large volumes of air in portable or permanent ventilation/exhaust systems
  • Wearstrip offers additional external and drag resistance

The “Wind Handler WS” flexible hose is a single-ply neoprene coated polyester fabric hose with a wear-strip designed for air applications. Neoprene is a synthetic rubber that is produced by the polymerization of chloroprene and exhibits good chemical stability and flexibility over a wide temperature range. The duct materials used in this product are highly compressible and retractable. The compressibility of this ventilation ducting allows a 25 ft length of hose to be compressed down to just over 2 feet! This is especially useful when the air duct needs to be transported to a different location.

This product is unique because it features a wear-strip that provides external protection against abrasion and wear. The duct materials used in its construction make this hose ideal for moving large volumes of air in both portable and permanent ventilation systems. This flex hose is easy to handle and has the ability to bend and flex around small spaces and corners. The “Wind Handler WS” flexible hose is listed as UL 94 V-0 flame retardant. Being constructed of UL 94 V-0 listed duct materials means that the product will stop burning after being exposed to a flame within 10 seconds (given the source of fuel has been removed). This makes the hose ideal for applications where safety is a concern. This product has a working temperature range of -65 F to +250 F, allowing it to be used for a wide variety of applications.

Neoprene Flex 2ply Coiled Up

“Neoprene Flex – 2 Ply”

Neoprene-Flex Ducting Ideal for Abusive Applications

Neoprene Flex Hoses are an excellent option for large diameter hose work due to their toughness and availability to suit various commercial and industrial applications. Sometimes you need a durable large diameter hose and in these cases our Neoprene-Flex 1 or 2 ply hoses are highly recommended. Designed for transferring dust and abrasive materials, Neoprene Flex Hoses are resistant to abrasions, chemicals, and general wear and tear, making them perfect for industrial applications such as ventilating landfills, tunnels, and mines. These flexible hoses are built with a standard 25-foot length and can withstand temperatures up to 250 degrees Fahrenheit for long periods. Depending on the type of product you choose, you can get various customization options such as inside diameter (ID) sizes that can go as large as 60-inches and different types of cuffs and flanges for your end finishes. Additionally, due to the durable neoprene coating, each Neoprene Flex Hose is exceptionally flexible in demanding environments and can be flexed into place as needed.

“Neoprene Flex – 2 Ply WS”

Neoprene Flex 2 ply WS hose black and yellow in color U shaped
Neoprene Flex 2 ply WS two hoses black and yellow in color both pointing bottom right

“Neoprene Flex – 1ply”

  • Recommended for light duty, low pressure applications
  • Neoprene coating offers excellent abrasion and chemical resistance
  • Designed for wide temperature ranges
  • Listed as UL 94 V-0 flame retardant

The “Neoprene Flex – 1ply” is an industrial strength black hose that can be used to convey air, dust, fume and even light materials. The flexible duct hose is constructed from single-ply neoprene coated polyester fabric with a spring steel wire helix. “Neoprene Flex – 1ply” flexible ducting is best used for light-duty low-pressure applications. Neoprene or polychloroprene is a family of synthetic rubbers that are produced by polymerization of chloroprene. Neoprene exhibits good chemical stability, and maintains flexibility over a wide temperature range.

“Neoprene Flex – 1ply” flexible ducting is available in black and is sold is 25 ft long coils. This collection hose can also be purchased in custom lengths, please consult a sales representative with your requirements. This collection hose is offered in a wide range of internal diameters from 1.5-inch ID to 20-Inch ID. The end of each collection hose is plain cut, but a variety of end cuffs are available upon request. The “Neoprene Flex – 1ply” industrial hose is found in a variety of markets including, agricultural, confined space ventilation, dry cleaning, and shipyards. For questions or additional information please contact one of our ducting experts for further assistance.

“Urethane Flex Static Dissipative”

$502.90$4,636.00
Lead Time 4-6 Weeks Temperature Range: -65°F to +225°F Sizes I.D. (in.): 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, & 12

“Urethane Flex Medium-Duty”

$252.13$2,250.75
Temperature Range: -65°F to +225°F Sizes I.D. (in.): 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 22, & 24

“Urethane Flex Extra Heavy-Duty”

$519.40$3,101.25
Lead Time 4-6 Weeks Temperature Range: -65°F to +225°F Sizes I.D. (in.): 4, 5, 6, 8, 10, 12, 14, 16, & 18

What Are Urethane Flex Ducts?

Urethane Flex Ducts are flexible polyurethane hoses composed of polymer and carbamate (urethane) links, which are known for their elasticity, transparency, and resistance to chemicals, extreme temperatures, oils, and solvents. Designed for air, dust, and material movement, the Urethane Flex Duct handles many industrial applications such as agricultural ducting, air and fume ventilation, and abrasive material extraction. Available in standard 25 and 50-foot lengths, these flexible ducts come in different wall thicknesses and colors, giving you options depending on your application. While Urethane Flex Ducts’ inside diameter (ID) can only go up to 24-inches, they are the only large diameter flexible hose with a clear construction, making it easy to spot any clogs and blockage, allowing operators to reduce machinery downtime. If you are looking for a reliable, flexible duct built to last in the most arduous environments, then the Urethane Flex Duct is the one for you.

“Urethane Flex Light-Duty”

“Urethane Flex Heavy-Duty”

“Urethane Flex Self Extinguishing”

  • Good low temperature flexibility
  • Great abrasion resistance & high tear strength
  • Superior chemical resistance

The “Urethane Flex Self Extinguishing” material handling hose is a medium-weight wall hose made with a self-extinguishing polyurethane material great for severe abrasive, dust, and material movement. The polyurethane hose materials used in this product gives it excellent chemical, abrasion resistance, and high tear strength. Polyurethane flex ducts exhibit the best abrasion resistance and are recommended in applications that demand a durable flex ducting. This material handling hose exhibits superior flex fatigue and is recommended for applications that require continuous flexing. This product is available in FDA acceptable materials and allows for its use in applications involving the movement of foods, grains, and pharmaceuticals.

This flex ducting works in temperatures ranging from a low of -65 to a high of +225 degrees Fahrenheit. The “Urethane Flex Self Extinguishing” hose is made of Halogen-free flame retardant hose materials. Halogens (Flourine, Chlorine, Bromine, Iodine, Astaline) are salt formers. This is especially for the electronics industry that has an interest in products assembled without the use of these elements in the raw materials.

“Tornado Flex In Sack”

$448.17$1,501.93
Lead Time 4-6 Weeks Temperature Range: -20°F to +180°F Sizes I.D. (in.): 6, 8, 10, 12, 14, 16, 18, 20, & 24

“Tornado Flex Insulated AD”

$616.00$7,086.06
Lead Time 4-6 Weeks Temperature Range: -20°F to +180°F Sizes I.D. (in.): 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 24, 28, 30, 36, & 48

“Wind Handler Insulated TU”

$628.40$10,584.06
Lead Time 4-6 Weeks Temperature Range: -40°F to +250°F Sizes I.D. (in.): 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 28, 30, 36, & 40

“Wind Handler”

$324.25$2,855.00
Lead Time 4-6 Weeks Temperature Range: -65°F to +250°F Sizes I.D. (in.): 4, 5, 6, 7, 8, 10, 12, 14, 16, 18, 20, & 24

Does Increasing Duct Size Increase Air Flow?

While increasing duct size can potentially increase air flow, it depends on several other factors, such as the length of your ductwork and the overall output of the large duct fan and ventilation system. If you increase the duct size without adjusting the overall output from your large duct fan, the air will become lost during the transfer from the source to the destination. On the other hand, if your ductwork is too small, simply increasing the output from your large flex fan will not increase its effectiveness. Instead, small ductwork will restrict airflow due to high friction loss, resulting in your large flex fan/HVAC system generating more noise, energy consumption, and wear and tear. Regardless of whether your ducting is too large or too small, improper duct sizes will reduce airflow, so your duct needs to have the proper CFM (cubic feet per minute) measurement to determine the HVAC system’s airflow effectively. If not, your HVAC systems will work harder, break down, and increase utility costs.

“Tornado Flex”

  • Lightweight duct for blower applications
  • Listed as UL 94V-0 flame retardant
  • Manufactured with materials that meet NFPA 701 standards
  • Highly compressible

The “Tornado Flex” is a lightweight hose made from made from single-ply PVC coated polyester fabric. This flexible air ducting product is given extra protection and durability through the reinforcement from a spring steel wire helix. “Tornado Flex” is an affordable hose that is recommended for industrial air movement applications. This product also features an external wear-strip that offers additional external abrasion protection and drag resistance. The addition of the wear-strip gives these industrial hoses longevity when used in non-permanent applications. Also, this lightweight hose is highly compressible and capable of retracting into a fraction of its fully extended length, allowing for easy transportation and storage. “Tornado Flex” has up to an 11 to 1 compression ratio, meaning that a 25ft. coil will reduce down to just over 2 feet!

The standard internal diameter sizes offered for this flexible air ducting product range from 4 to 24 inches with custom sizes available up to 52 inches. The lightweight construction of this flexible air ducting gives it a wide range of applications involving airflow such as blower hoses, wave pool blowers, mining, A/C ventilation, cold air supply, humidity control, and smoke ejectors.

Smooth tube PU yellow in color pointing down coiled up

“Smooth-Tube PU”

Does Hose Diameter Affect CFM?

The hose diameter is crucial in determining the flex hose’s CFM (cubic feet per minute). Changing the inside diameter (ID) of your flex hose will change the pressure throughout the hose and, in doing so, will change the overall density of air volume as it is being transferred from the source to the end. While measuring CFM of airflow through a flex hose or ductwork can be a complex calculation, the rule of thumb for determining CFM for your tools and machinery is that for each 1 CFM of airflow, you need 1 square inch of duct area. So handheld devices such as spray guns tend to require 1-3 CFM and will work perfectly well with a 6mm hose. In the case of large industrial machinery and applications, the higher the CFM requirement of your machinery is, the larger the diameter hose you’ll need to have proper airflow and ventilation. No matter what kind of flex hose size you choose for your large diameter ducting needs, it is vital that you have accurate CFM measurements so that your machinery is effective.

“Urethane Flex General Purpose Black”

Urethane Flex General Purpose Black coiled up

“Urethane Flex Static Dissipative”

  • Great abrasion resistance & high tear strength
  • Superior chemical resistance & excellent flexibility
  • Ideal for clean room and material plastic processing applications

The “Urethane Flex Static Dissipative” material handling hose is a medium-weight wall hose featuring an electrostatic discharge resistant surface. The electrostatic resistant surface allows this product to reduce static buildup when handling materials. This is especially useful in applications when static buildup can result in explosions or accidents. In addition to the static resistant surface, the polyurethane used in this product gives it excellent chemical and abrasion resistance and high tear strength. The spring steel wire helix provides extra support and durability. These flex hoses are built with a medium weight construction, making it ideal for medium-duty applications with abrasives, dust, and materials. This flex duct is great for woodworking and grain handling applications.

The “Urethane Flex Static Dissipative” material ducting hose is constructed to work in a wide range of temperature applications. This product is designed to work in temperatures ranging from a low of -65 to a high of +225 degrees Fahrenheit. The high temperature tolerance, electrostatic discharge resistance, chemical resistance, and tear strength qualities given by the hose materials make this a great flex duct for most abrasive environments.

“Wind Handler Insulated TU”

$628.40$10,584.06
Lead Time 4-6 Weeks Temperature Range: -40°F to +250°F Sizes I.D. (in.): 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 28, 30, 36, & 40

“Wind Handler WS”

$378.25$12,843.88
Lead Time 4-6 Weeks Temperature Range: -65°F to +250°F Sizes I.D. (in.): 4, 5, 6, 7, 8, 10, 12, 14, 16, 18, 20, 24, 28, 30, 36, 40, 42, 48, & 52

“Wind Handler”

$324.25$2,855.00
Lead Time 4-6 Weeks Temperature Range: -65°F to +250°F Sizes I.D. (in.): 4, 5, 6, 7, 8, 10, 12, 14, 16, 18, 20, & 24

“Thermoplastic Flex Medium-Duty”

  • Great moisture and UV resistance
  • Smooth interior assures minimal friction loss and efficient air flow

The “Thermoplastic Flex Medium-Duty” flexible hose is a great general all-purpose thermoplastic hose for medium-duty applications. This flexible hose is made from thermoplastic rubber. Thermoplastic rubbers are a class of copolymers that possess both thermoplastic and elastomeric properties, generally made from a mix of plastic and rubber. Thermoplastic rubber products have a successful track record in a wide range of automotive, industrial and commercial applications. These rubber hoses have reduced weight, lower costs, consistent performance, and are recyclable, unlike thermoset rubber compounds. Thermoplastic rubber ducts exhibit durability to extreme temperature and chemical exposure while offering excellent flexibility and abrasion resistance.

The “Thermoplastic Flex Medium-Duty” industrial ducts are made to operate at both high and low temperatures. This thermoplastic hose has a temperature range of -40 degrees to +275 degrees Fahrenheit, allowing it to be used in a wide variety of applications. The “Thermoplastic Flex Medium-Duty” rubber hose is made to order in both 25 and 50-foot sections. These thermoplastic industrial ducts are available in a wide variety of sizes in both inches and metric measurements (200 ft minimum for metric sizes). The standard internal diameter sizes for theses rubber ducts range from 1.5 to 24 inches and 60 to 300mm in metric measurements.

Is Bigger Ductwork Better?

The size of your ventilation unit dictates the size your ductwork and when installed, selecting the correct size ductwork is a major factor in proper unit operation and unit longevity. While bigger ductwork can allow more airflow and materials to be transferred through, unless it is matched with the proper requirements of your equipment, it will only create more problems than solutions. It is vital to have a large diameter hose that is appropriate and functional for your commercial and industrial applications. If you have larger fans, then the size of your ducts needs to be large as well. Ductwork that’s too small won’t be able to carry enough air to heat or cool your building. Ducts that are too large for the systems they are installed in, can lose both air and energy, cutting system efficiency. We suggest using ductwork that fits your machinery and equipment properly. Deviating from this principal generally will not work favorably.

Short Length Hoses Interchangeable
Overstock Inventory Interchangeable