Complete Duct Fabrication
 Capabilities

YYBunker manufactures a comprehensive range of sheet metal ductwork and ventilation components from our 20,000 sq. ft. Brooklyn fabrication facility. Every product is built to specification, fabricated in-house, and quality-checked before leaving the shop.

Duct Systems We Fabricate

oval duct

Oval Duct

Space-efficient oval duct designed for installations where ceiling plenum clearance is restricted. Ideal for residential and light commercial applications where round duct airflow performance is needed in a lower-profile form factor. Fabricated to your dimensions with consistent seaming and fitment.

spiral round

Spiral Round Duct

High-integrity spiral duct for commercial and industrial HVAC, ventilation, and exhaust systems. The helical lock-seam construction delivers superior rigidity and low air leakage, making it well-suited for long straight runs, exposed architectural installations, and high-velocity systems. Available in galvanized steel and stainless steel.

rectangular duct

Rectangular Duct

The standard of commercial HVAC construction. We fabricate rectangular duct in all widths, heights, and gauges, along with a full range of fittings including elbows, offsets, tees, transitions, and end caps - all produced directly from your submitted drawings or plans.

black iron sheet

Black Iron Sheet Metal Duct

Fabricated for kitchen exhaust, commercial grease duct, and high-temperature applications. Black iron ductwork is manufactured to meet applicable fire and safety codes, including welded seam construction where required. Suitable for restaurants, commercial kitchens, institutional food service, and industrial exhaust systems.

aluminum sheet duct

Aluminum Sheet Metal Duct

Lightweight and corrosion-resistant aluminum ductwork for applications where galvanized steel is not suitable. Common applications include coastal environments, chemical exhaust systems, cleanroom facilities, and projects with strict weight limitations.

custom duct fabrication

Custom Duct & Specialty Fabrication

Not every project fits a catalog. We fabricate custom duct sections, non-standard transitions, specialty plenums, complex fittings, and unique configurations based on your drawings, field measurements, or hand sketches. Our team will work with you to ensure the fabricated piece meets your exact requirements.

Services

Material takeoff

Material Takeoff from
 Plans

Submit your shop drawings or full mechanical plans and our estimating team will perform a complete, accurate material takeoff. This ensures you receive the correct quantities, minimizes waste, and reduces the risk of costly field errors.

fabrication from

Fabrication from Hand Sketches

We understand that field conditions don't always produce clean drawings. If you're working from a hand sketch, a redline, or a field measurement — send it to us. Our experienced team knows how to read and translate field information into precise fabricated ductwork.

services delivery

Delivery

Completed ductwork is delivered directly to your job site on a schedule coordinated with your installation timeline. We are not limited to a specific geographic area - we deliver wherever your project is located.

installation services

Installation Services

For qualifying projects, YYBunker offers duct installation services. Contact our team to discuss the scope and logistics of your project.

general contractor

General Contractor & Subcontractor Coordination

We work regularly with General Contractors and mechanical subcontractors on phased and fast-track projects. We understand procurement schedules, phased material releases, and the coordination demands of active construction projects. Our team communicates directly with your project management to keep material flowing on schedule.

Materials & Finishes

01/
Galvanized Steel
standard commercial and residential HVAC applications
02/
Black Iron (Mild Steel)
kitchen exhaust, grease duct, high-heat environments
03/
Aluminum
corrosion resistance, lightweight applications, specialty environments
04/
Stainless Steel
industrial, chemical, pharmaceutical, and cleanroom applications