ASM
Precision Custom Sheetmetal Fabrication & Ductwork Fabricated In-House. Installed with Precision.
We fabricate and install custom sheetmetal ductwork and components for commercial HVAC and plumbing projects across Connecticut. Our in-house sheetmetal fabrication shop handles galvanized, stainless steel, aluminum, black iron, and specialty alloys — giving you precise, high-performance systems built to meet your project’s specifications and standards. Every fitting, transition, and welded section is fabricated under one roof, ensuring consistency and accuracy from shop to field. Whether it’s a large mechanical system upgrade or a small retrofit, our fabrication team delivers clean, professional results that make installation faster and more reliable.
As a trusted HVAC and mechanical contractor in Connecticut, we specialize in fabrication for cleanrooms, laboratories, and other critical environments where quality and reliability matter most. Our team understands the demands of tight tolerances, airflow performance, and cleanliness required in these spaces. Because most fabrication is done in-house, we maintain complete control over quality, timelines, and coordination with the field and design teams. This integrated approach reduces project risk and allows us to respond quickly to design changes, site conditions, or fast-track schedules. Whether it’s a large mechanical system upgrade or a small retrofit, our fabrication team delivers clean, professional results that make installation faster and more reliable — all built to SMACNA standards for duct construction and installation quality.
Our Connecticut-based sheetmetal fabrication shop produces ductwork and custom sheetmetal components to meet the demands of commercial HVAC and mechanical systems in critical-environment projects across Connecticut.
✔️ Galvanized, stainless, aluminum, and carbon steel (black iron) fabrication
✔️ Rectangular and welded duct systems
✔️ Breeching, stacks, transitions, hoods, and enclosures
✔️ Field measurement and shop drawings using advanced tools — allowing precision and coordination beyond what most contractors provide
✔️ Pre-install coordination with other trades to reduce clashes
✔️ Delivery and expert installation by our in-house team
Whether it’s simple duct runs or high-spec custom sheetmetal fabrication, we’ve got you covered.
Applications We Support
We fabricate and install duct systems and custom sheetmetal assemblies for a wide range of environments and use cases — from everyday commercial HVAC installations to fully engineered systems in code-driven, critical environments.
✔️ Commercial HVAC (offices, retail, mixed-use)
✔️ Labs and cleanrooms
✔️ Healthcare and hospital systems
✔️ Industrial process and exhaust systems
✔️ Schools, universities, and municipal buildings
✔️ Equipment ventilation, outside air, and supply air systems
In-House Custom Sheetmetal Fabrication
With our own fabrication shop and experienced team, we control quality, lead time, and fit — all without relying on outside vendors. That means:
✔️ Faster turnaround for custom sheetmetal fabrication or replacement ductwork 
✔️ Fewer coordination delays and misfits in the field
✔️ Better integration with mechanical, electrical, and structural elements
✔️ Less risk of change orders or rework
Whether it’s a rush project for a local contractor or a complex cleanroom requiring high-spec welded duct, our in-house shop ensures your job stays on track.
See Our Custom Sheetmetal Fabrication
Sheetmetal Glossary
Not sure what G90 means or what a Pittsburgh seam is? We’ve created a glossary to help you understand the industry terms behind sheetmetal fabrication and ductwork design.
Featured Projects with Custom Ductwork
Explore how we’ve delivered precision ductwork for projects of all types:
🔨Cleanroom Retrofit with Welded Stainless Duct – New Haven
🔨 Stair Tower Exhaust Installation – UConn Campus Facility
🔨 Underslab Duct Coordination – Hartford Office Buildout
🔨 Hospital Fan Wall Integration – Bridgeport Area Healthcare Facility
🔨 Roof Curb and Duct Installation – Manufacturing Facility, Waterbury
Let’s Talk About Your Custom Sheetmetal Fabrication
Whether you’re a general contractor needing rapid custom sheetmetal fabrication or a facilities team upgrading your mechanical system, we’re here to help.
📞 Ready to get started? [Contact Us ➝]
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