Brookshire, TX 77423·46,000 sq ft in stock·Ships 1–15 business days
hstube6@gmail.com·+1-346-827-6702
USFlexDuct

Commercial HVAC Ductwork

Flexible and insulated ducts for commercial air distribution — office buildings, retail spaces, hotels, restaurants, and multi-story ventilation systems. Manufactured in Houston, TX and Dongyang, China.

Why commercial buildings choose flexible ductwork

Commercial HVAC systems need ductwork that adapts to complex ceiling layouts, tight plenum spaces, and evolving tenant configurations. Flexible ducts install faster, route around obstacles, and reduce noise — without sacrificing airflow performance.

Fast Install

Flexible duct installs 3-5x faster than rigid sheet metal. Critical for tenant build-outs, renovations, and retrofit projects where downtime means lost revenue. No welding, no sheet metal shop — cut, connect, secure.

UL Listed

UL 181 Class 1 certified for flame spread and smoke development. Meets all US building codes for commercial HVAC installations. Insurance-ready documentation for every project.

Noise Control

Flexible duct naturally attenuates HVAC noise better than rigid metal duct. Combined with our soundproof insulated ducts, achieve NC-30 or lower in offices, hotel rooms, and quiet retail environments.

Ductwork for every commercial environment

Office Buildings & Tenant Build-Outs

Multi-zone HVAC systems in office spaces need flexible routing from VAV boxes to ceiling diffusers. When tenants change, flexible duct re-routes without demolishing hard duct runs. Our R6 and R8 insulated flex ducts prevent condensation in above-ceiling plenums and maintain supply air temperature to each zone.

Retail Spaces & Shopping Centers

Retail HVAC must handle high occupancy loads, kitchen exhaust from food courts, and frequent layout changes as stores reconfigure. Aluminum flex ducts provide the flexibility to route around sprinkler lines, electrical conduit, and structural beams in tight ceiling spaces. Large-diameter options handle the high CFM demands of open-plan retail environments.

Hotels & Hospitality

Guest comfort depends on quiet, consistent air distribution to every room. Our soundproof insulated ducts reduce HVAC noise to below NC-30 — essential for guest satisfaction. Insulated flex duct also prevents condensation dripping onto ceiling tiles, a common complaint in humid climates. Each room gets individually controlled supply air via flexible duct branches from the corridor main.

Restaurants & Commercial Kitchens

Restaurant HVAC handles kitchen exhaust make-up air, dining room comfort cooling, and bathroom exhaust — all in a compact footprint. Semi-rigid aluminum ducts maintain shape in tight ceiling cavities above kitchens, while PVC steel wire ducts handle grease-laden exhaust routing. Our ducts are designed to work alongside kitchen hood exhaust systems without cross-contamination.

Multi-Story & High-Rise Buildings

Vertical air distribution in multi-story buildings requires flexible duct connections between rigid risers and floor-level distribution. Our insulated flex ducts absorb building movement, floor settling, and thermal expansion that would crack rigid connections. Available in diameters up to 24 inches for high-rise main distribution branches.

Built for commercial scale

Whether it's a single office renovation or a 50-story mixed-use tower, our dual-facility production model delivers the volume, consistency, and lead times commercial projects demand.

30
Years Manufacturing
6
Production Lines
60+
Countries Served
2
Facilities (USA + China)

Commercial HVAC Ductwork FAQ

What size flexible duct is used in commercial buildings?+
Commercial HVAC systems typically use 6-18 inch diameter flexible ducts. Branch runs from VAV boxes to ceiling diffusers commonly use 6-10 inch diameter. Main trunk connections and high-CFM zones use 12-18 inch. We stock all standard sizes from 4" to 24" diameter in 25-foot compressed lengths.
Is flexible duct code-compliant for commercial installations?+
Yes. Our flexible ducts are UL 181 Class 1 listed, meeting NFPA 90A and all major US building codes for commercial HVAC ductwork. They are acceptable for supply, return, and exhaust air applications in commercial buildings per IMC and UMC.
What R-value insulation do I need for commercial HVAC ducts?+
ASHRAE 90.1 and IECC energy codes require minimum R-6 insulation for supply ducts in unconditioned spaces (above ceilings, in attics). R-8 is recommended for extreme climate zones and for ducts in unconditioned spaces with high temperature differentials. Our insulated flex ducts come in R-4.2, R-6, and R-8 options.
How do you handle large commercial orders?+
We support phased deliveries aligned to construction schedules. Orders can be delivered floor-by-floor or zone-by-zone as the build progresses. Our Houston facility handles domestic orders with 1-2 week lead times. For large projects, we can reserve production capacity and provide material submittals and shop drawings.
Can I use flexible duct for kitchen exhaust?+
Flexible duct is NOT suitable for grease-laden kitchen hood exhaust — that requires rigid welded duct per NFPA 96. However, flexible duct IS used for kitchen make-up air supply, bathroom exhaust, dining room supply/return, and general ventilation in restaurant spaces adjacent to the kitchen.

Need Ductwork for a Commercial Project?

Get a custom quote for flexible and insulated ductwork — sized and specified for your commercial HVAC system. Engineering support, phased delivery, and competitive wholesale pricing.

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