Your Pittsburgh Sheet Metal Fabrication Experts
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 metal components, our goal is simple — precision-built products that perform better, last longer and install easier. 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 Pittsburgh sheet metal fabrication.
Benefits of Duct 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 sheet metal 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.
Our Custom Sheet Metal Fabrication in Pittsburgh
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.
Capabilities and Equipment
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.
Fabrication Options
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.
Our Custom Ductwork Fabrication Process
Hennemuth stocks a wide range of standard pipes and fittings — ready for immediate use — but we also specialize in tailored solutions.
Standard Inventory
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.
Our Ductwork Products
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
Our rectangular ducts are space-efficient and ideal for both residential and commercial HVAC systems:
- Standard and custom rectangular ductwork
- Double-wall duct options
- Precise fabrication to reduce leakage and maximize airflow
Spiral Ducts
Our spiral ducts are available in galvanized, stainless steel, galvanneal (Paint Grip) and double-beaded steel:
- Sizes from 4 to 40 inches in diameter
- Standard 10-foot lengths (custom up to 20 feet)
- Insulation up to 2 inches
- Powder coating options
Fabricated to meet or exceed SMACNA standards, spiral ducts offer lower leakage rates, reduced noise and easier cleaning.
Flexible Ducts
We supply UL-listed flexible ducts in 25-foot lengths, with options for:
- Uninsulated foil flex
- Insulated ducts (R4.2, R6, R8 values)
- Diameters from 4 to 20 inches
These are perfect for tight spaces and specialized applications, including acoustic, high-pressure and antimicrobial ducts.
Coil Line Ductwork
Our coil line production supports fast turnaround while maintaining the high quality we’re known for. Options include Slip and Drive, TDF flange, insulated and uninsulated ducts.
Why Partner With Us for HVAC Ductwork Supply in Pittsburgh?
Contractors across Pennsylvania rely on Hennemuth for sheet metal solutions because we combine decades of expertise with modern technology. Our operating territory is within a 200-mile radius of Pittsburgh, ensuring reliable delivery and consistent results.
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
When you choose Hennemuth, you’re choosing a partner who values precision, efficiency and reliability as much as you do.
How We Produce Ventilation Ductwork for Any Project
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. Our advanced software and fabrication equipment allow us to produce even the most complex ductwork designs accurately, resulting in smooth installation and long-term reliability.
If standard sizes won’t work, our custom fabrication process ensures you’ll get the exact parts you need — without compromising project timelines.
Call Us for Superior Sheet Metal Manufacturing
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 724-693-9605 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.
