The “Air Ventilator Large Diameter” hose is an air ventilation duct designed to move large volumes of air. This flexible duct is available in unusually large duct sizes which have traditionally not been available off the shelf. This large flexible ducting is stocked and sold in 30-inch, 36-inch, 42-inch and 48-inch diameters and all are available in 25-foot-long coils. All of the large air duct ends have a belted cuffed end for easy installation. This reduces the need for clamps and makes installing ventilation pipes a quick and painless task. These large diameter hose products are designed for use in large commercial ventilation applications that require a hose to deploy quick and fast for use in field installations.
This large bore flexible hose is made from PVC vinyl coated polyester fabric hose that is reinforced with a spring steel wire helix. Due to its PVC construction, the flex duct is resistant to weathering, chemical rotting, corrosion, and abrasion. PVC ducting is notably resilient and displays excellent resistance to both physical and chemical exposures. This flexible duct wall’s high tensile strength prevents it from being easily fissured or warped under normal pressures. PVC flex ducts are the preferred choice for many long-life and outdoor installations.
This duct has been tested and meets the NFPA 701-2023 standard methods of fire tests for flame propagation of textiles and films. Under NFPA 701, the PVC coated duct fabric is tested by burning a small sample and measuring the flame, the char length and flame residue. If a ducting material meets the NFPA 701 standards in these three areas, the flexible duct is considered flame retardant and receives a NFPA 701 certification. In institutional or military applications, air conditioner hose or ventilation duct hose are generally required to carry flame retardant qualities. In these cases the inventoried “Air Ventilator Large Diameter Yellow ” will offer a quick and easy access to a portable air conditioner hose or a large air vent duct for industry.
Although this is large diameter flex ducting, it is made with an external wearstrip. The extra layer of protection is an added PVC coated fabric that is an auxiliary layer applied to the areas the metal helix is constructed around. Though perhaps too large to be dragged and moved continuously, these large ducts will be moved during installation and perhaps moved again when the temporary ventilation installation is closed. The additional layer of protection will add life to the hose and keep it from accidental damage.
Volume Pricing
| Pricing per Foot | 25 – 99 feet | 100 – 249 feet | 250 – 499 feet | 500+ feet | |
| 30″ ID | $26.89 | $23.39 | $22.18 | $20.17 | |
| 36″ ID | $32.28 | $28.08 | $26.63 | $24.21 | |
| 42″ ID | $41.38 | $36.00 | $34.14 | $31.03 | |
| 48″ ID | $48.20 | $41.93 | $39.76 | $36.15 |
See “Air Ventilator Yellow” Flexible Ducting in Action
Air Ventilator Yellow
PVC Flexduct (General Purpose) Clear
Expert's Review
Our Expert’s Opinion
Robert, an experienced team member, has this to say
Pros
Hard to Find: Stocked Flexible ducting in large diameters is a rarity.
Inventoried: Stocked in 24-, 30-, 36-, 42-, and 48-Inch diameters
Black Wearstrip: Reduces damage from exterior elements
Belted Cuffed Ends: No additional clamps necessary
Very Compressible Duct
Yellow Color Hose: Very visible
Flame Retardant: Meets NFPA 701-2023 flame propagation requirements
Cons
End Cuffs: Not available with custom end cuffs.
Custom Sizes: Available with large volume orders only
Duct Length: Only available in 25 foot lengths
Cuffs: Only available with belted cuffed ends
Limited Use: Only for air ventilation applications
WARNING: Cancer and Reproductive Harm - 
