New external tensioning enables fabric ductwork to replace heavy, rigid metal for airflow solutions in ultra-large applications

DUBUQUE, IOWA (May 20, 2026) — DuctSox, a leader in engineered fabric air dispersion solutions, today announced the launch of SkeleCore ETS (External Tensioning System), a new addition to its SkeleCore lineup that expands fabric HVAC duct technology into ultra-large diameter applications from 90 to 156 inches.

Designed for large, demanding spaces such as stadiums and arenas, aircraft hangars, convention centers, fulfillment centers and natatoriums, SkeleCore ETS gives engineers, architects, contractors and facility owners a new alternative to metal ductwork in applications where size, weight, rigging and installation complexity have traditionally limited design options.

Other fabric solutions typically max out at 100 inches. Until now, metal has dominated the ultra-large market. SkeleCore ETS is DuctSox’s external tensioning solution for extreme diameters, extending the advantages of fabric ductwork airflow into a category long dominated by metal systems. By replacing heavy, rigid metal ductwork with a lighter engineered fabric system, ETS helps reduce structural load, simplify installation, and deliver the performance, appearance and flexibility designers expect from DuctSox solutions.

Ultra-large duct applications have historically pushed the market toward metal because internal tensioning systems reach practical size limits. SkeleCore ETS changes that by giving the market a purpose-built fabric alternative for extreme diameters while preserving the performance, aesthetics and installation advantages of fabric air dispersion.

The launch also reinforces SkeleCore as DuctSox’s family of engineered tensioning systems, including SkeleCore PT, SkeleCore FTS and now SkeleCore ETS. ETS extends the platform into ultra-large diameter applications, eliminating the need to transition to metal ductwork as system size increases.

Key advantages of SkeleCore ETS include:

• Ultra-large diameters from 90 to 156 inches
• Engineered 360-degree shape control
• Reduced reliance on heavy-gauge metal ductwork
• Lower structural load and simplified handling
• Faster, more efficient installation
• Fabric-system benefits including design flexibility, reduced condensation concerns and strong aesthetic appeal

For project teams designing HVAC systems in large open environments, those benefits can improve both construction execution and long-term facility performance. In the ultra-large category, DuctSox now offers a fabric solution where competing fabric manufacturers do not currently provide an equivalent option.

About DuctSox

A wholly owned subsidiary of Rite-Hite, DuctSox is a manufacturer of commercial and industrial fabric ductwork & diffuser systems for open/finished ceiling architecture, critical environments and underfloor applications. DuctSox fabric systems are a cost effective, aesthetically attractive alternative to metal ductwork and diffusers.