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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 Service Questions
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Read About Our Customers’ Recent Experiences
Anneka Lindholm
2 days ago
Southport completed a furnace inspection and tuneup, and same day fixed a couple things that had come up in their review. Their staff is kind, friendly, consistent, informative, and knowledgeable. Their explanation was thorough and their reports showed they really did their due diligence. They take their time to answer questions and leave the homeowner feeling confident. Can’t recommend enough.
Craig Willett
3 days ago
Tyler and Dakota installed our new A/C unit today. Right form the time they arrived (on time!) until they departed their professionalism, skills and gentlemanly manners never swayed. They are excellent representatives of Southport. More reasons why we use Southport exclusively! A job well done, Tyler and Dakota!
Andrew performed the annual plumbing inspection 2/20/2025. He is very knowledgeable and skilled in his work. He discovered a couple of situations that needed immediate attention. Those situations were promptly addressed and corrected. Like Tyler and Dakota Andrew is a stellar example of the excellent service from Southport!
On 10/22/2026, Tyler did the annual inspection on our furnace and found a couple concerns. He explained the situation and gave fair estimates. A great representative of Southport!
Also on 10/22/2026, Caleb stopped by abd presented estimates for replacing the furnace. He is very knowledgeable and presents all options very well. Another excellent representative of Southport!
On 10/23/2026 Service Technician Jacob performed the necessary repairs and cleaning of our furnace. Jacob is not extremely knowledgeable, he is personable and efficient. Definitely another outstanding representative of a great company. Well done, thank you!
Andrew performed the annual plumbing inspection 2/20/2025. He is very knowledgeable and skilled in his work. He discovered a couple of situations that needed immediate attention. Those situations were promptly addressed and corrected. Like Tyler and Dakota Andrew is a stellar example of the excellent service from Southport!
On 10/22/2026, Tyler did the annual inspection on our furnace and found a couple concerns. He explained the situation and gave fair estimates. A great representative of Southport!
Also on 10/22/2026, Caleb stopped by abd presented estimates for replacing the furnace. He is very knowledgeable and presents all options very well. Another excellent representative of Southport!
On 10/23/2026 Service Technician Jacob performed the necessary repairs and cleaning of our furnace. Jacob is not extremely knowledgeable, he is personable and efficient. Definitely another outstanding representative of a great company. Well done, thank you!
Lynda Behringer
3 days ago
Southport was exceptional from beginning to end. We had an unfortunate incident last week Wednesday that lead us to having to replace our Furnace.
After an emergency call to our local Fire Department in Caledonia and WE Energies, we reached out to Southport Home Services. They had a Technician out early the next morning to evaluate the issue, within minutes Nathan Simons called and was in our home explaining the many options that best fit our needs. He was very detailed, thorough, knowledgeable and displayed outstanding customer service.
The Technicians installed our new Furnace that next day. We are beyond pleased and thank you Southport for the fabulous Customer Service and explaining our options.
We highly recommend Southport to any and everyone looking for Five Star service!!
Many Thanks!
Sincerely Lynda & Mark Behringer
After an emergency call to our local Fire Department in Caledonia and WE Energies, we reached out to Southport Home Services. They had a Technician out early the next morning to evaluate the issue, within minutes Nathan Simons called and was in our home explaining the many options that best fit our needs. He was very detailed, thorough, knowledgeable and displayed outstanding customer service.
The Technicians installed our new Furnace that next day. We are beyond pleased and thank you Southport for the fabulous Customer Service and explaining our options.
We highly recommend Southport to any and everyone looking for Five Star service!!
Many Thanks!
Sincerely Lynda & Mark Behringer
Maria Tuttle
3 days ago
We just replaced our entire HVAC system and Hot Water Heater this week with Southport...and we could not be happier!! Our previous system was working but was old...and Southport was able to come out IMMEDIATELY...even during this severe cold snap!! Starting with Nate, who came out to inspect, estimate the job and oversee it...to out technicians, Ryan, Casey and Jackson, these guys ROCKED!!! They were super polite...super efficient...super informative and they left the work area amazingly cleaned up! They were creative in accomplishing an off the beaten road request that we made and everything is in order. When you need HVAC work done...LOOK NO FURTHER!!!
10/22/26: So due Operator error, (or as I say, owner stupidity…LOL…😜), I called regarding a stuck button on my 8 year old electronic thermostat. We scheduled an appointment with SOUTHPORT and Tyler S. was just here and I was told something I probably already knew, (apparently). The button on the thermostat is ALWAYS-that way because the entire thing runs on a TOUCH SCREEN!!!! DUH!!!!
The visit was awesome and Tyler and his mentor giggled with me and DID NOT make me feel stupid at all!! Excellent customer service, from scheduling the appointment (same day) through the end of the appointment. Thank you Tyler and alllof the Southport staff!!!
10/22/26: So due Operator error, (or as I say, owner stupidity…LOL…😜), I called regarding a stuck button on my 8 year old electronic thermostat. We scheduled an appointment with SOUTHPORT and Tyler S. was just here and I was told something I probably already knew, (apparently). The button on the thermostat is ALWAYS-that way because the entire thing runs on a TOUCH SCREEN!!!! DUH!!!!
The visit was awesome and Tyler and his mentor giggled with me and DID NOT make me feel stupid at all!! Excellent customer service, from scheduling the appointment (same day) through the end of the appointment. Thank you Tyler and alllof the Southport staff!!!
Gregory Toff
4 days ago
Travis did an excellent job. Very nice work.
Robin Ingrouille
4 days ago
Good company with great people. They did a great job of installing our new furnace and Ac and their price was very reasonable
Conn Huffaker
4 days ago
I want to give a shout out to HVAC technician Vincent Beyer who provided much more than a simple routine check of my furnace. For example, he went through a list of suggestions to make my unit last longer, operate safer, and improve its efficiency. He explained technical items in ways that I could understand their need and how they operated within the whole system. We finished his visit by sitting down and covering every point we had discussed to make sure I understood and was comfortable with all the options and details.
In my opinion, you couldn't have a finer representative for your company.
In my opinion, you couldn't have a finer representative for your company.
Richard Gage
4 days ago
I had my annual furnace/heat pump checkup this morning. Abraham Celis was the HVAC technician. He comleted a very thorough inspection and went over the results completely with me. Abraham took the time to insure the checkup was done in a quality manner, not just rushing to complete the job and to get to his next stop. I was impressed with Abraham's friendliness and professionalism. Another job well done by Southport.
I had my annual Heat Pump AC checkup today (8/26/26) by Southport. As always, their technician Zach Birkholrz did a thorough and excellent job. Zach is very pleasant and professional and explains the checkup process and results very clearly. And, as a bonus, he gets along with our dog.
Joe Suchla replaced our two outside faucets and main water shut-off today. The rear faucet was only accessible from a basement crawl space, so he installed a secondary shut-off valve in the baseme t so I did not have to enter the crawl space to shut off the faucet in the winter months. He also bought the main water shut-off up to code with a shut-off valve on each side of the meter. Joe arrived on time, performed all plumbing upgrades professionally, kept me informed of the upgrade progress, and cleaned up at the end of the job. We are very pleased with the job Joe did and have always been pleased with the work Southport has done for our plumbing and HVAC needs. We highly recommend Southport.
Jackson did an excellent job of system check of our AC. He explained everything he checked and the meaning of all test results. A very friendly and professional service tech. Highly recommend SouthPort and Jackson.
I had my annual Heat Pump AC checkup today (8/26/26) by Southport. As always, their technician Zach Birkholrz did a thorough and excellent job. Zach is very pleasant and professional and explains the checkup process and results very clearly. And, as a bonus, he gets along with our dog.
Joe Suchla replaced our two outside faucets and main water shut-off today. The rear faucet was only accessible from a basement crawl space, so he installed a secondary shut-off valve in the baseme t so I did not have to enter the crawl space to shut off the faucet in the winter months. He also bought the main water shut-off up to code with a shut-off valve on each side of the meter. Joe arrived on time, performed all plumbing upgrades professionally, kept me informed of the upgrade progress, and cleaned up at the end of the job. We are very pleased with the job Joe did and have always been pleased with the work Southport has done for our plumbing and HVAC needs. We highly recommend Southport.
Jackson did an excellent job of system check of our AC. He explained everything he checked and the meaning of all test results. A very friendly and professional service tech. Highly recommend SouthPort and Jackson.
Alan Skripsky
4 days ago
Mat did great work.
On 10/21/26 Luke did great work.
On 10/21/26 Luke did great work.
Craig Willett
4 days ago
Tyler and Dakota installed our new A/C unit today. Right form the time they arrived (on time!) until they departed their professionalism, skills and gentlemanly manners never swayed. They are excellent representatives of Southport. More reasons why we use Southport exclusively! A job well done, Tyler and Dakota!
Andrew performed the annual plumbing inspection 2/20/2025. He is very knowledgeable and skilled in his work. He discovered a couple of situations that needed immediate attention. Those situations were promptly addressed and corrected. Like Tyler and Dakota Andrew is a stellar example of the excellent service from Southport!
On 10/22/2026, Tyler did the annual inspection on our furnace and found a couple concerns. He explained the situation and gave fair estimates. A great representative of Southport!
Also on 10/22/2026, Caleb stopped by abd presented estimates for replacing the furnace. He is very knowledgeable and presents all options very well. Another excellent representative of Southport!
Andrew performed the annual plumbing inspection 2/20/2025. He is very knowledgeable and skilled in his work. He discovered a couple of situations that needed immediate attention. Those situations were promptly addressed and corrected. Like Tyler and Dakota Andrew is a stellar example of the excellent service from Southport!
On 10/22/2026, Tyler did the annual inspection on our furnace and found a couple concerns. He explained the situation and gave fair estimates. A great representative of Southport!
Also on 10/22/2026, Caleb stopped by abd presented estimates for replacing the furnace. He is very knowledgeable and presents all options very well. Another excellent representative of Southport!
Ned C
4 days ago
My service provider was outstanding!! Answering my questions and providing me with useful information and advice.
Debbra Thorne
4 days ago
They gave a fair price for the work and they showed up on time. Very thorough and explain all they did. Good quality work
Carla Resch
6 days ago
Max and Noel replaced my furnace, and I'm very pleased with the work that was done. Thank you to Anthony for initiallyidentifying the problem and attempting to repair it. Thanks also to Justin for meeting with me late on a Friday afternoon to select a furnace, schedule an install and work through financing with me.
Patrick Stiennon
6 days ago
Look at ever issue I was interested in and explained options we could go from there. Was fine about sending me the option so I could think it over now or in the future.
Patti P
6 days ago
Travis and Luke did a thorough job inspecting our water heater, plumbing and furnace. We have a maintenance agreement and it seems worthwhile for our house heating, air conditioning and plumbing needs.
Wendy Zwolenski Lambert
6 days ago
The technician, Abe, was very helpful and efficient.
Laurie Poznanski
7 days ago
Needed my tub drain cleaned out. Very prompt and efficient, even did a full check of my entire system at no additional charge!! I don't want to jinx myself but i will definitely call them again in the future!!!
Stephen Bantz
1 week ago
Jake did a very through job checking out my furnace. Was able to answer any questions I had. Being part of shield program is great!
