Expert Sheet Metal & Commercial Ductwork Fabrication Services
If you’re an HVAC contractor looking for commercial ductwork fabrication in the Pittsburgh region, Hennemuth Metal Fabricators is built to support your schedule. We fabricate ductwork and components with a focus on fast lead times, reliable performance, and direct communication, so you can get accurate answers from a team that understands your job.
Since 1954, Hennemuth Metal Fabricators has been family-owned and operated, serving contractors and businesses throughout the Pittsburgh region. With more than 70 years of experience, we’ve built our reputation on delivering sheet metal fabrication solutions that meet demanding industry standards while saving our clients time and money.
From HVAC ductwork to custom sheet metal components, our goal is simple: precision-built products that perform better, last longer, and install cleanly. Every piece is fabricated with care to ensure it supports efficient airflow, reliable HVAC performance, and compliance with codes and regulations.
Whether you need standard ductwork or a completely customized solution, Hennemuth is your trusted source for sheet metal fabrication in Pittsburgh, PA.
Key Benefits of Custom Ductwork Fabrication
Custom sheet metal work is more than just cutting and shaping metal — it’s about creating HVAC components that keep your systems running at peak performance. At Hennemuth, we believe that precise fabrication is the foundation of reliable results.
Our metal duct fabrication in Pittsburgh offers several key benefits:
- Code compliance: All our products are built to SMACNA standards, ensuring safety and regulatory compliance.
- Project flexibility: From small residential builds to large commercial projects, we scale production to match your needs.
- Durability that lasts: Our ductwork is built to withstand years of use, helping contractors deliver long-lasting value to their clients.
- Improved airflow: Precision fabrication reduces air leakage and resistance, resulting in better HVAC efficiency and energy savings.
- Custom-fit solutions: Because we manufacture everything in-house, your ducts are built to exact project specifications. That means seamless installations and no wasted time completing jobsite modifications.
By choosing Hennemuth, contractors get products that fit better, perform better and save time on installation.
When off-the-shelf ductwork isn’t enough, we custom-fabricate exactly what your project requires. With advanced equipment and a team of skilled technicians, we can produce virtually any size or configuration.
Advanced Sheet Metal Fabrication Equipment & Technology
Our facility features:
- Spiral duct machine
- Precision waterjet cutter
- 6-cradle coil line for efficiency
- A 20-foot coil-fed CNC plasma cutter
This technology ensures speed, precision and consistent quality for every order. Because multiple machines can run simultaneously, we reduce lead times without sacrificing craftsmanship.
Flexible Ductwork Fabrication Options for Any Project
We offer duct fabrication with:
- External wrapping
- Slip and Drive connections
- Four-bolt rectangular connectors
- Pittsburgh Duct and Snap Lock Duct
- Internal lining (½-inch or 1-inch insulation)
If you can draw it, we can build it. Our engineers and fabricators work closely with you to recommend time-saving alternatives and ensure every piece integrates seamlessly into your system.
Sheet Metal Fabrication Process: From Design to Delivery
Hennemuth stocks a wide range of standard pipes and fittings, ready for immediate use, but we also specialize in tailored solutions.
In-Stock Standard Ductwork & Fittings
Our standard inventory includes pipes in 10-foot lengths (4–24 inches) and fittings like saddle taps, reducers, 90° elbows, 45° elbows, couplers and end caps.
Custom Manufacturing
Our custom manufacturing includes pipes and fittings up to 30 inches in diameter, plus custom lengths and specialty fittings available to order.
Our process begins with a review of your blueprints or project photos. From there, we help determine whether our standard duct options — including rectangular and spiral ducts — are the right fit or if a custom design is needed. Every consultation includes a clear project timeline and estimate, so you’ll know exactly what to expect before we start fabricating.
Design and Consultation
At Hennemuth Metal Fabrications, we offer design and consultation services to ensure the product you receive is ideal for your projects. Our expert designers will review the products with you over the phone to ensure we send the right items for your project before filling the order. This practice helps minimize errors, and our suggestions can save you money on materials by creating a more efficient design for your project. Our experts will work with you to design your ductwork system for optimal efficiency. We can consult on commercial projects of any size.
Complete Ductwork Product Range
Hennemuth offers one of the most comprehensive product ranges in Pittsburgh metal fabrication. Whether you’re replacing existing ductwork or building a system from the ground up, we provide durable, precision-fit products.
Rectangular Ducts
We have an extensive range of rectangular ducts, such as square duct hangers, general return air boots, shortway elbows, starting collars, duct adapters and more. Some advantages of using rectangular commercial air ducts include the following:
- Compact: Rectangular ducts are shorter than spiral ducts and, therefore, ideal for ceilings with depth restrictions.
- Easy to connect: These ducts are a great tap-in when working with a trunk and branch system.
- Accessible: Rectangular ductwork is easy to insulate and maintain.
- Cost-effective: These units are more accessible and cost-effective to ship because they can lie flat for transport.
Spiral Ducts
Our spiral duct selection includes pipes, reducers, spiral diffusers, end caps, saddle taps, couplers and more. Some of the advantages of using commercial spiral ductwork include:
- Less leaking: Spiral duct joint shapes minimize leaks to help keep heating, filtering and cooling costs low while maintaining indoor air quality.
- Less noise: These ducts have low-pressure drops and a compact design, resulting in less noise.
- Easy insulation: Spiral ducts are accessible to insulate due to their stiff design.
- Easy to clean: This duct configuration allows easier cleaning using cost-effective methods.
Flex Duct
Our extensive selection of flex ducts includes 5-foot sleeves, aluminum flexes, high-pressure and AMF insulated flexes. Our commercial flexible ducts vary in length, color, vapor barrier, insulation, inner core, diameter and helix construction. We also have a range of flexible ducts serving specific purposes like:
- Acoustic ducts: This style is ideal for areas that need noise control, such as schools, offices and conference rooms.
- High-pressure ducts: These ducts use airtight polyester aluminum foil and a polyester tri-laminate inner core for stability. They are suitable for high-velocity HVAC systems.
- Antimicrobial ducts: Perfect for medical facilities and other sensitive areas, this design has an Agion®-treated inner core that resists microbial growth and a unique blue vapor barrier to keep the HVAC system clean.
Why Choose Hennemuth for Sheet Metal Fabrication?
Contractors across Pennsylvania rely on Hennemuth for sheet metal solutions because we combine decades of expertise with modern technology. We primarily serve the Pittsburgh region and surrounding areas, with pickup and delivery options available for qualifying orders.
Advantages of working with us include:
- 100% in-house manufacturing for quality control
- Seamless fit and performance that saves time on jobsites
- Cost-effective solutions optimized for material efficiency
- Reliable delivery across Western Pennsylvania and beyond
- Industry compliance with strict adherence to SMACNA codes
- Fast lead times with stocked inventory and efficient processes
- Expert customer support with over 100 years of combined experience on our team
Every job is unique and our team treats it that way. By reviewing your order details, blueprints or project images, we ensure every duct is fabricated to exact requirements.
When you choose Hennemuth, you’re choosing a partner who values precision, efficiency and reliability as much as you do.
Contact an Expert Today
Get Your Custom Sheet Metal Fabrication Quote Today
Are you looking for sheet metal in Pittsburgh? At Hennemuth Metal Fabricators, our mission is to deliver products that make your HVAC systems more effective and installations easier. Whether you need standard ductwork or custom sheet metal fabrication in Pittsburgh, we have the tools, experience and expertise to get it done right.
Ready to discuss your project? Request a quote today or call us at 724-789-8604 to speak with our team about your order.
Call Us for Superior Sheet Metal Manufacturing
Regarding our products, we account for every potential benefit to create goods that are as effective as possible. Our custom sheet metal fabrication enhances the quality of our HVAC products, so you can install our one-of-a-kind sheet metal duct fittings and other items for any project while knowing they're as sturdy as possible.
If you think our metal systems fabrication process will satisfy your customers, get a quote for a project today or call us at 724-693-9605 for exceptional HVAC manufacturing.
