Full Service Mechanical Contractor

Offering a strong diversity of mechanical services

Serving Chicagoland since 1963



We offer innovative design, system fabrication, project coordination and field installation to meet the needs of today’s commercial construction industry.


Heavy Industrial

We offer complete total plant development, installation, process piping, refrigeration, expansion projects, or performing recurring maintenance.


Industrial Refrigeration

Offering turnkey solutions to our customers both local and national.


Food & Process Piping

AMS offers the design and installation of process and utility piping.


Service & Maintenance

We are available for our customers 24/7.


Safety, making zero accidents a reality…

Home Safe Everyday


Quality Assurance

Quality management focused on providing confidence that quality requirements will be fulfilled.

Here at AMS Mechanical we are Client Focused!
We know if we serve our clients well - Success will follow!

Solutions Provider

We are proactive and reactive to meeting the challenges and demands of our customers. We strive to stay ahead of the curve.


Our high standards of excellence, innovative approach, and dedication to exceeding the needs of our customers are well known throughout the industry.


Effective listening and establishing solid long-term relationships with our clients and our industry have been the catalyst for which we model our successes.

Customer Support

We are available to our customers 24/7. You can trust and rely on our commitment to quality, integrity and reliable service every time.

AMS Mechanical Systems, Inc. provides complete concept and full-service mechanical contracting. We are passionately committed to our customers, the industry and each other. These are the hallmarks of an approach that has built our reputation over five decades of serving clients in HVAC, Industrial Refrigeration, Heavy Industrial Piping and Construction, Food and process piping, electrical power and control systems, plumbing and service and maintenance. At all times we act with integrity, providing quality service, while being reliable and responsible. Fulfilling our obligation of building a better, stronger and more durable company for future generations, protecting the AMS brand, meeting our commitments to clients, developing our people and helping improve communities.

Continue reading>

Full Service Mechanical Contractor



AMS Mechanical Systems Commercial business group provides professional HVAC services in the design build, design assist, and the plan specification market place for both private and public commercial sectors.
Heavy Industrial

Heavy Industrial

These services vary from Process & Power Piping, Equipment settings, Ironwork, Millwright, Civil/Concrete/Heavy Foundations to small maintenance and capital program work.

Industrial Refrigeration/<br />
Food Processing

Industrial Refrigeration/
Food Processing

Serving the industry for over fifty years, AMS has developed unmatched capabilities for the diverse needs of the Industrial Ammonia and Freon refrigeration industry throughout the United States.
Service & Maintenance

Service & Maintenance

Service is more than just a word; it is a mutual dedication and commitment to our clients and an example of the comprehensive business model we maintain.
Quality Assurance

Quality Assurance

The AMS Mechanical Systems, Inc. Quality Assurance Program has been accredited by both the American Society of Mechanical Engineers (ASME) and the National Board of Boiler and Pressure Vessel Inspectors (NBBI).

Safety Training


We put safety and quality of life first. Safety encompasses every area of life. Creating a safe and healthy work environment is a part of AMS philosophy.

Design & Engineering

AMS offers complete engineering, system design/layout and installation services for both Commercial, HVAC, and Industrial refrigeration industries.
Want to know more
  • Hey Dennis,

    You already know you have a great group of people working with you but today they came through big time. ParkShore, and possibly even more so, I appreciate Tony and Donna pulling a bunch of work together in a day. Thanks again.

    Have a great weekend everyone. Thanks again to Tony, Donna and Eileen (HVAC), she tried today and we were this/close to having someone come out. Just late notice on our end.


    - ParkShore Condominium Association

  • I would like to thank you all for the time your people were here they did a great job they represented your company well.  I would like to give a special thanks to Dave Novak he is by far the best plumber I have ever seen work he really takes pride in his work from start to finish. It is very rare to have someone so valuable on your team that you can trust to do anything and that represents your company to the highest standards.

    - 1415 N Dearborn

  • AMS Mechanical and Plumbing are the best contractors on Earth! Dependable, reliable, trustworthy, professional, and very easy to work with. They make the process of doing a project seamless. And response time to emergency situations is impeccable.

    Thank you – John, Ben, Bill, Eric, Dennis, and team!

    - Midwest, Kimpton Hotels & Restaurants

  • Our company, Anderson/Miller, Ltd. has worked on large and small scale Hospitality projects since our inception in 1982 and have often had the good fortune of collaborating with Dennis Sartain and AMS on Plumbing and its related trades.  AMS’s expertise and practical know-how is invaluable to finding solutions that are appropriate, affordable and aesthetically correct to preserve design intent.  Dennis is proactive in his approach and anticipates problems before they arise.

    - Anderson/Miller, Ltd.

  • I have worked with AMS mechanical for over 10 years and have successfully completed many projects together. The level of expertise at AMS, from senior management to field personnel, is second to none. They bring a level of understanding of the scope, schedule, and the needs of the client that truly sets them apart. They have always been a valuable and dependable member of the project team, successfully addressing challenges and providing solutions that help us stay on schedule and within budget.

    - James McHugh Construction Co.

  • “In the course of 25 years in the hotel industry, I have renovated several assets. To me it has always been important to work with a contractor that offers more than just technical experience in the project. With AMS Mechanical, I found a partner that not only was competent in the job, but someone that took the time to collaborate with me on finding solutions that made the project more effective, efficient and what was best for the hotel or restaurant. I learned quite a bit from AMS and their approach to managing a project. The care and effort that went into developing a relationship with me was far more important than just getting the job done. From a personal and professional position, I cannot express how pleased I am with their work, their people and their commitment to doing the job right. I highly recommend them for any potential projects you may have in the works.”

    - Kimpton® Hotels & Restaurants

  • Donna,
    I just received a call from a driver who was in distress and was helped by several of your technicians.
    The caller wanted to pass along his gratitude to the company, in particular Frank Favicchio, Adrian Novak and one other employee that he could not identify.
    The driver stated that their willingness to lend a helping hand to others in need, showed their solid character and went far beyond what he expected from strangers.

    Please pass along the caller’s sentiment, as well as my own and thank them for representing AMS in a good light.

    - Paul Armenia, Procurement Manager, AMS

  • Bill,
    I would like to express my appreciation for the crew that was sent here to perform our hot water tie-in to our existing system. It was not a flawless shut down to say the least. This was my first major shut down of any significance regarding the mechanical systems and I needed to be present to see exactly what was involved. Your personnel starting with Frank Favicchio were great to work with. Frank had everything coordinated as well as it could be. The issues that we had were with our system and valves not with AMS.
    On site for the shut down were: Frank Favicchio, Adrian Novak, Dave Novak and Dillon Bass. First let me say what a great crew. They all knew their part and worked as a unit with my personnel to accomplish this very heart stopping task of shutting water down to my whole building. I would like you to pass this along not only to them but whoever else should know of their efforts. Great Job!
    I hope that I never have to do another shut down like that again, but if I do I would like to request these same people.

    Thank you,

    - Jeff Kerr, Palos Community Hospital

  • I just wanted to follow up to say Thanks again for getting Mike out to Park. Our Chief Custodian (Eric) worked with him to install the new motor as well as check the other boiler that was having problems.

    Eric, just came up and said they were finished and he passed along that Mike did an excellent job. He raved on for a while about how good Mike was, that he REALLY knew his stuff and was a pleasure to work with. He asked if he could call Mike’s boss “Krista” to let her know and of course I said YES. It is always good to hear the good stuff.  However, I also wanted to touch base with you because Eric NEVER does this. They only other person I have ever heard him compliment was Pete.

    So, AMS is batting 1000 on their techs and “infinity” on compliments from Eric.

    Thanks again for sending him out. It was VERY much appreciated.

    - Tom Akerman, Director of Buildings & Grounds

  • Dennis,

    I wanted to personally thank you and your entire team for the excellent work on the almost completed renovation of the Fair Field Inn @ Midway.  You are new to our stable of Sub-contractors, but I can see a longstanding relationship with AMS and value this relationship and the work you have done for Cicero’s so far. We plan to include you on future opportunities, both large and small. Your professionalism, skilled trade’s people and pragmatic attitude is a prime example of why we want to continue to work with your team on an ongoing basis.  The attention to detail, excellent working relationship with both the hotel as well as Cicero’s is what we look for on a renovation. Your team has helped make this project successful and is evidenced by the minimal list of punch items and your quick response in resolving the items that were outstanding.

    It is a pleasure for us to work with you, we look forward to future projects.


    - Sam Cicero, Jr. – President

  • I have know and worked with Dennis Abbott for the better part of 28 years as an onsite Chief Engineer at several luxury residential high rises in the downtown area, and then as the Director of Engineering for FirstServices Residential. Throughout my career whenever I was in need of service I could count on Dennis and or his colleagues to support me and the associations I was representing. As we in the industry know, it’s the “service” we receive from our vendors that establishes a foundation that cannot be diminished when change is eminent. To this, I am grateful to know and work with Dennis Abbott and A.M.S. Mechanical, and expect to continue until we both retire as old gray men. By the way, have you seen his picture? This may happen sooner than later!

    - Robert Meyer,
    Director of Engineering Services at FirstService Residential

  • AMS did an excellent Job on every account. Bill & Krista make an awesome team!!

    - Kathleen Dormin, 30 West Oak Condo Association

  • “We had the pleasure of working with your site foreman. He demonstrated excellent leadership, displayed a positive attitude, and his extensive knowledge of mechanical systems ensured that the project ran smoothly.”

    Yours Truly,

    - Marco Mancini, Urbacon LTD

  • “The degree of professionalism and expertise that I have seen from AMS, over the past several weeks, is second to none. It is an absolute pleasure to be working with each and every member of the AMS team.”


    - Terry Enright, Assistant V.P. Engineering, Arden Realty, Inc.

  • “I would like to take this opportunity to thank AMS Project Manager’s and their on-site teams for thier work effort, cooperation and overall “get it done” attitude on the Domino’s Pizza Project in Woodridge, IL. It was indeed a pleasure to work with professional such as AMS Project Manager’s and the AMS on-site teams who are knowledgeable and have a great team attitude to get a project done in a tight time frame. Please thank the on-site team for us. We will continue to look for future opportunities to work with AMS – PMT group of professionals.”

    - Russ Cudmore, Primus Builders

  • I use AMS-PMT and they ROCK.  They have a guy who can find hidden crossover issues — and they have the patience of saints.  All the Novak brothers are smart and exceptionally competent.  Biggest thing is that they can explain to irate residents what needs to be done and allay their concerns.  I’ve used them for four years and can’t say enough good things about them.  630.887.7700, ask for Donna Leska / Dennis Abbott.

    - Diana C. Turowski, CMCA Property Manager,1550 Lake Shore Drive

  • Guys,

    I wanted to reach out and thank you for the great installation at Downers Grove.  The lead sales guy for Aerco who checks on all of our projects was onsite today and told me it was the best install he has seen.  They were very pleased with it along with the hotel.  Thanks for all the effort y’all put into it.


    - MSS Solutions

Quality Assurance

We are proud to provide our customers with the highest level quality standards available throughout every aspect of our operations.