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Commercial Wholesale Ductwork & Fabrication in Greater Wisconsin
Dependable by Design
4.8 Google Rated
Commercial buildings depend on mechanical systems to support daily operations, meet airflow requirements, and ensure long-term performance. Southport Mechanical provides commercial ductwork fabrication and supply built to meet code requirements and project demands across Madison and Greater Wisconsin.
Our team supports projects at every stage, including duct system design coordination, in-house fabrication, installation support, and ongoing system evaluation. New construction, retrofit, and modification projects are handled with a focus on accuracy, efficiency, and system performance.
Request a bid to connect with our commercial team and discuss your project requirements.
Ductwork Fabrication and Supply
Southport Mechanical produces custom ductwork and fittings for commercial HVAC systems, supporting contractors and project teams with accurate, ready-to-install components.
- Rectangular and spiral ductwork
- Custom duct fittings and transitions
- Multiple material types and gauge options
- Prefabricated duct sections for efficient installation
All fabrication is completed in-house to maintain quality control, support project timelines, and ensure consistency across system components.
Commercial Ductwork Services
Southport Mechanical supports ductwork systems across fabrication, installation, and performance evaluation.
Fabrication & Prefabrication
- Custom duct production based on system design
- Prefabricated sections to reduce field installation time
Fabrication processes are structured to improve installation efficiency and maintain consistent build quality.
Installation Support
- Coordination with HVAC system layouts and equipment
- Integration with rooftop units and ventilation systems
Ductwork is aligned with system requirements to support proper airflow and performance.
Repair & Modification
- Ductwork adjustments for system upgrades or layout changes
- Replacement of damaged or leaking sections
Modifications are completed to maintain system integrity and airflow performance.
Inspection & Performance Checks
- Airflow evaluation and system balancing support
- Identification of leaks, restrictions, or sizing issues
System checks focus on maintaining proper airflow and overall performance.
Ductwork Capabilities
Southport Mechanical delivers ductwork systems built to meet the demands of commercial and industrial environments.
- Sheet metal fabrication for commercial HVAC systems
- Custom duct sizing and layout coordination
- Integration with mechanical system design
- Support for new construction and retrofit projects
Each system is developed to align with building requirements, airflow demands, and overall system performance goals.
Full Lifecycle Ductwork Support
Southport Mechanical supports ductwork systems across all phases of operation.
- Fabrication for new construction projects
- Ductwork replacement and retrofit
- System modifications for equipment upgrades
- Ongoing inspection and performance evaluation
This approach supports consistent airflow performance and system reliability across the life of the building.
Commercial Ductwork Applications
Our team works across a range of commercial and industrial environments.
- Commercial buildings
- Industrial facilities
- Municipal projects
- Multi-family developments
Each environment requires specific duct design considerations that are addressed through system layout, sizing, and coordination with mechanical systems.
Why Southport Mechanical
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In-house ductwork fabrication to maintain quality control and reduce project delays
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Coordination across fabrication, installation, and mechanical system design for consistent execution
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Experience supporting commercial and industrial HVAC projects with complex duct requirements
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Focus on airflow performance, system efficiency, and long-term operation across all installations
Industries We Serve
Industrial
Manufacturing Facilities
Educational Facilities
Government Facilities
Healthcare Facilities
Nursing/Assisted Living Facilities
Multi Family and Hotels
Business and Retail Facilities
Warehousing and Storage Facilities
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FAQ'S
Expert Answers To Your Plumbing Questions
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Read About Our Customers’ Recent Experiences
Mary Belotti
3 days ago
My experience started with a call to Southport for a second look opinion. They were highly recommended. The technician Tyler was able to find and explain the problem/s I was having with my 20 year old furnace and AC unit. He went over my options thoroughly, quickly set up a time for Justin to go over those options with necessary numbers, and the appointment was made for a new furnace and AC. The technicians Max, Diego and Aaron did a fantastic job with removal of my existing system and new installation. They treated me and my home with respect, paying great attention to detail. Max explained the process as they went along, making sure any question I had was answered. Nathan, the sales manager was even kind enough to stop and make sure I was happy with the whole process. The entire staff exceeded my expectations and were so professional, courteous and respectful, which is especially appreciated, as home repairs can be quite stressful. I highly recommend Southport.
Judy J
5 days ago
Rob S was very prompt and informative. He seemed very knowledgeable and did a great job. He explained everything that he had done and why and asked if I had any further concerns or questions before leaving. I felt confident that he did a good job and all that ws necessary. Great experience.
Florence Hammelev
1 week ago
Prompt competent service.
Kim Beattie
1 week ago
The Southport team was responsive, knowledgeable and extremely thorough. Anthony, Steven and Nick were very helpful. They caught a situation that the pre ious company did not.
Quinn 1271
1 week ago
Southport responded quickly and effectively in replacing our sump pump on the day of the storm on 4/17/2026 where our lower level of our home flooded. Both Alex and Andy responded. Despite not being on call, Andy responded as a neighbor and ensured that the sump pump got installed himself so that the overflow would stop and damage would be minimized. This included working in the midst of the water at 3am. I suspect the water damage and overall impact would have been exponentially worse if not for Andy’s dedication to solving the problem. I was out of town when this occurred and both my spouse and I are very grateful for Andy and Southport’s prompt emergency response. Approximately a week later we proceeded with installation of a battery backup. Thank you for the service and assistance in mitigating this very stressful and difficult situation.
Susan Niman
2 weeks ago
Joe S has come to our home several times and always treats it very well.
We have also used Southport for many years for several things and highly recommend them. They are thorough, professional, treat your home like their own, and always have an accurate estimate for you
Paige Lincicum
2 weeks ago
Andrew was great for the plumbing we needed done. Super knowledgeable and friendly. Highly recommend!
Joseph Männchen
3 weeks ago
I saw Southport at a remodeling trade show at Monona Terrace in Madison, and requested an inspection of the heat pump in my 40+ yo condo. The person scheduling the appointment handled a last minute change to the appt professionally and accommodated my request. The technician was also very professional and knew his trade incredibly well. When the inspection unsurprisingly showed the unit needed replacement, I was still provided with repair options, pricing on individual repairs, and payment methods. A definite bonus was the tech was personable and empathetic, going as far as laughing at my dad jokes (they're bad, trust me 🙄). Finally, there was no pressure to pay for additional services, or any hard sales to purchase anything or repair on the spot. Overall a great experience, I will be using Southport going forward.
Terry Ryan
3 weeks ago
Last week we had Tornados in our area. While listening to the warnings, the meteorologist mentioned a back up sump pump would be beneficial to have. I scheduled an appointment with Southport home services. Andrew came out and explain how the system works. He then gave me prices.. He was able to install the system the same day. I highly recommend Southport Home Services.
Mary Hoffmann
3 weeks ago
My technicians were quite well informed and highly skilled in replacing all of the plumbing in the basement (hot water heater, sump pump, back up sump pump and battery, ejector pump). Highly recommend this company and the specific technician that performed all the work.
Peter Benson
4 weeks ago
These guys were flexible, the team showed up on time, and got the job finished quickly.
Good price too. So far so good with our new heat pump water heater.
A P
4 weeks ago
The main sump pump & emergency sump pumps with a battery were installed and the replacement pump of a toilet. The guy was friendly did a very nice job. We're happy with the work.
Mel Menke
4 weeks ago
I noticed water on the floor on Friday morning below water heater. Called and service tech came out early afternoon. Problem confirmed and new one installed by late afternoon. Entire process was smooth and without incident. Tech was very professional and consistently communicated status so I stayed informed.
Carole Richard
4 weeks ago
Travis was professional and answered my questions. He was very helpful and informative.
T C
4 weeks ago
With all the flooding we had I was concerned about how often my sump pump was running and if it was working correctly. Tanner from Southport was here promptly and checked my sump pump over as well as the drainage hose I installed making sure everything was working as expected. He explained what to watch for as well as the services Southport offered. I am grateful for his professionalism as well as Southport's Shield program!
Kate Weisenburg
4 weeks ago
Southport is always great!! I've had them out for a couple of planned items in the past, so when my sump pump died this morning, they were my first and only call. Not only did they give me a 2 hour time frame in the first phone call, but they continued to call me back and update me as the technicians arrival time changed! Justin was the technician dispatched to my house. He was awesome. There's simply no other word for it. He looked at the pump, gave me 3 quotes, let me pick & choose the features & warranty I wanted, then immediately went to work because all the parts were already on his truck. He also gave me the name of a water remediation company they work closely with and coached me on what questions to address with that other service provider!! I will truly never call anyone else again. Southport has earned my business FOR LIFE!
Daniel Schneider
1 month ago
On time, professional, and helpful. Justan did a great job explaining the process for the annual plumbing services.
Carlos J. B.
1 month ago
Sump Pump and Maintenence Free Battery Backup Assembly installation, somewhat expensive.
