Fabric Ducts

Fabric ducts are components for assembling commercial HVAC airflow runs. Facility teams and HVAC installers use straight sections to carry or distribute conditioned air, elbows to route a run through planned directional changes, and end caps to close the end of each run. The available components support connected fabric duct layouts for airflow distribution areas.

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Helpful Buying Guide

Fabric Ducts: Components for Commercial HVAC Airflow Distribution

Fabric ducts give facility teams and HVAC installers a modular way to distribute conditioned air across commercial spaces. Choose from vented and unvented straight sections, directional elbows, and end caps to build a complete, suspended duct run sized to your system's airflow requirements.

Visual Guide

Popular examples in this category

32-Inch Diameter 45-Degree Gray Right-Hand Fabric Duct Elbow32-Inch Diameter 45-Degree Gray Right-Hand Fabric Duct ElbowWBB57217624 in. Gray Fabric Duct Straight Section with Vents, 1,000 CFM24 in. Gray Fabric Duct Straight Section with Vents, 1,000 CFMWBB57244328-Inch Gray Fabric Duct Straight Section with Vents, 400 CFM28-Inch Gray Fabric Duct Straight Section with Vents, 400 CFMWBB57247216-Inch Gray Fabric Duct Straight Section with Vents, 500 CFM16-Inch Gray Fabric Duct Straight Section with Vents, 500 CFMWBB572208
What These Products Are For

Distributing and Routing Conditioned Air in Commercial Spaces

Fabric duct components assemble into suspended airflow runs for commercial HVAC systems. Straight sections carry or distribute air, elbows redirect runs at planned angles, and end caps close each run. Together they form a connected layout for even air distribution across a facility area.

How To Choose

Match Each Component to Its Role in the Duct Layout

Start with the component type: vented sections for air distribution, unvented sections for carrying air between points, elbows for direction changes, and end caps to finish each run. Then match diameter, length, CFM rating, and system static pressure to your HVAC design before ordering.

Common Applications

Where Fabric Duct Systems Are Typically Installed

Fabric duct runs are commonly installed in warehouses, gyms, manufacturing floors, retail spaces, and large open-plan offices where even air distribution across a wide area is needed and a suspended, modular duct system fits the ceiling structure and HVAC layout.

Additional Information

Connection Features and Suspension Details

Many straight sections include built-in zipper connections for secure component-to-component attachment and fabric loops designed for cable hook suspension. These features simplify installation and allow the duct run to be repositioned or extended without specialized hardware.

Vented vs. UnventedTwo Straight-Section Types

Vented straight sections distribute air through laser-cut openings along the duct; unvented sections carry air between connected components without releasing it.

45-Degree FixedElbow Orientation

Available elbows are fixed at a 45-degree right-hand orientation, so confirm the planned turn direction matches before ordering.

Zipper + LoopBuilt-In Connection Features

Listed straight sections include zipper connections for component attachment and fabric loops for cable hook suspension, supporting a complete suspended run.

CFM + Static PressureKey Airflow Specs

Where listed, compare each section's CFM rating and system static pressure to your HVAC design to confirm the component is sized correctly for the run.

Comparison Guide

Choosing the Right Fabric Duct Component for Each Part of the Run

Use this table to match each role in your duct layout to the correct component type.

NeedBest FitWhy It Matters
Distribute conditioned air along a zoneVented straight sectionLaser-cut openings release air evenly along the section's length
Carry air between components without releasing itUnvented straight sectionKeeps airflow contained until it reaches a distribution section
Change the run direction at a planned angle45-degree right-hand elbowRoutes the run through a fixed directional change; orientation must match the planned turn
Close the end of a completed duct runEnd cap sized to duct diameterSeals the terminal end and must be matched to both diameter and run airflow
Suspend and connect sections in a continuous runSections with zipper connections and fabric loopsEnables secure component joining and cable hook suspension without added hardware
Planning Guide

Plan the right fit before choosing

Planning Guide

Step 1: Map the Duct Layout Before Selecting Components

Sketch the full airflow run from the supply connection to the end of each branch. Identify where air needs to be distributed versus simply carried, where direction changes occur, and where each run terminates. This layout determines which component types you need and how many of each.

  • Mark distribution zones where vented straight sections are needed
  • Mark transition points where unvented sections carry air between components
  • Note each directional change to determine elbow quantity and orientation
  • Identify every run endpoint to confirm end cap count and sizing
Planning Guide

Step 2: Size Each Component to the HVAC System

Diameter is the primary sizing dimension and must be consistent across connected components in a run. Cross-reference the system's CFM output and static pressure against the specs listed for each section and end cap. Mismatched sizing reduces airflow performance and can create pressure imbalances.

  • Match straight-section diameter to the supply collar or adjacent component
  • Confirm CFM and static pressure ratings where listed for each section
  • Size end caps to the duct diameter and verify against total or per-run airflow
  • Select the 45-degree elbow in the correct diameter and confirm its fixed right-hand orientation fits the planned turn direction
Planning Guide

Step 3: Plan the Suspension and Connection Method

Fabric duct runs are suspended from the ceiling structure using cable hooks that attach to fabric loops on the straight sections. Confirm that the sections you select include these loops and zipper connections before ordering. Plan cable hook spacing and ceiling anchor points as part of the installation prep.

  • Verify fabric loop availability on selected straight sections for cable hook attachment
  • Confirm zipper connections are present for secure section-to-section joining
  • Plan ceiling anchor points at intervals that support the loaded duct run
  • Account for access needs if the run may require repositioning after installation
FAQ

Common questions before buying

What is the difference between vented and unvented straight sections?

Vented straight sections have laser-cut openings that release conditioned air into the space along the length of the section. Unvented straight sections have no openings and are used to carry air between components before it reaches a distribution zone.

How do I know which diameter to order?

The diameter of every component in a connected run must match. Start with the diameter of your supply collar or the existing duct connection, then select all straight sections, elbows, and end caps in that same diameter.

Can the 45-degree elbow be used for left-hand turns?

No. The available elbow has a fixed right-hand orientation. Before ordering, confirm that the planned directional change in your layout matches a right-hand 45-degree turn.

How are fabric duct sections suspended from the ceiling?

Straight sections with fabric loops are suspended using cable hooks that attach to those loops. The hooks connect to ceiling anchors spaced along the run. Confirm that the sections you select include fabric loops before purchasing.

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