RECTANGULAR DUCT
Rectangular (or “square”) ductwork is the most widely used type in commercial HVAC systems. Its flat, rectangular profile allows for versatile installation in tight or irregular spaces, such as ceiling voids and wall cavities, while ensuring optimal airflow distribution across large areas. With universally recognized fabrication standards, rectangular duct simplifies coordination between field installers, contractors, and suppliers, streamlining the ordering process with Commercial Duct Systems. Per SMACNA standards, our rectangular duct is fabricated with a Pittsburgh seam.
To learn more about our Rectangular Duct products, please click the button below:
SPIRAL DUCT
Round ductwork is an increasingly popular choice in commercial HVAC, most commonly used for main-trunk takeoffs to VAV units. Valued for its ease of field modification and sleek aesthetics in exposed systems, it offers both performance and design flexibility. Our round duct is fabricated with a helical (spiral) seam by default, ensuring a robust connection that meets the 10” water-gauge pressure class. Additionally, it can be ovalized to optimize airflow in compact spaces while maintaining high air velocity efficiency.
**Rolled single-seam pictured
To learn more about our Spiral/Round Duct products, please click the button below:
HVAC ACCESSORIES
Commercial Duct Systems offers the following accessories:
- TDC corners with nut/bolt hardware.
- Butyl gasket.
- Slips/Drives/Barlock.
- Ductmate frames.
- Spiral RF connections (round flanges) and male/female couplers.
- Flex canvas (Raw)
- Blue plastic wrap for sealing duct during transport/storage, often required under regulation to uphold cleanliness standards.
- 3M adhesive formulated for fiberglass liner.
SPECIALTY FABRICATION
Commercial Duct Systems is built on the expertise of industry professionals, delivering unmatched sheet metal fabrication service. No project is beyond our reach—we welcome the opportunity to discuss your unique fabrication needs. Contact us to explore custom solutions.
We Are a Fabricator, Not a Mechanical Contractor, Not Your Competition.
Commercial Duct Systems is a dedicated HVAC ductwork fabrication company. We manufacture ductwork and related sheet metal products for mechanical contractors. We do not perform installation services, field labor, or mechanical contracting work of any kind.
Our role is to support mechanical contractors by providing high-quality fabricated products, reliable production capacity, and responsive project coordination.
We are a manufacturing partner—not a competitor.
Our mission is to simplify HVAC project management through comprehensive manufacturing and logistics solutions. We’re more than just a supplier—we’re a dedicated partner, committed to the success of your projects.
Experience the Commercial Duct Systems advantage—where innovation, quality, and customer focus drive faster, smarter, and more reliable HVAC solutions.
CONTACT INFORMATION
REQUEST A QUOTE
For pricing, plans, and bid submissions, use our dedicated quote request form by clicking the button below.
PROJECT PAYMENT ASSISTANCE:
