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Commercial Plumbing & HVAC-R Contractor

Commercial Project References

When it comes to commercial HVAC and Plumbing projects, we know you have many options. There are dozens of commercial heating, refrigeration and plumbing firms throughout Illinois and Wisconsin. When it comes to selecting the right company, we believe we are your best choice. Our mechanical team works tirelessly to finish all projects on-time and on-budget. Look at what some of our clients have said about our work.


  • A-1 Restoration Disaster Services: “The quality of the workmanship has stayed consistent throughout the 23 years of service. Whether it’s plumbing, heating, mechanical, or process piping, Hartwig Plumbing & Heating should be proud of the dedication and hard work put forward to make every project a success story your team and the client can share.” “Consistently met all expectations and expeditiously solve problems allowing the project to stay on schedule” … “I can recommend without hesitation or reservation.” Jeff Dunbar, president
  • Direct Design: “Hartwig Plumbing & Heating and Direct Design Ltd. have worked on many projects together over the past 20 years. The customer focus exhibited by your firm has made us advocates of your ability to deliver. Whether serving our plumbing, heating, mechanical or process piping needs throughout the midwest, Hartwig has consistently exhibited impressive planning, communication and execution. Hartwig Plumbing & Heating continues to be a trusted partner.” John F. Swierk, AIA, LEED, AP, president
  • Kraft Foods OMBU: “Your company’s support and willingness to go above and beyond the initial scope of work to do all that could be done to complete the projects are also appreciated.” “It is important for you to know the respect each individual gave, not only me, but also to the Management of the companies that I represent.” Herb Smith, Elzinga & Volkers
  • Ledcor Construction: “Your effort, experience, and intelligence are really beyond any plumbing outfit I’ve been around in 16-17 years of running work.” “Your plumbers in the field are top notch guys.” Stan Martenson, project superintendent
  • Tishman Construction Corporation of Illinois: “It is that level of engagement from Hartwig’s office that sets them apart from the many other plumbing contractors that I’ve contracted with over the years. I hope they are in the running on your project as I’m confident that you will have an equally satisfying experience.”  KC Forman, Sr. Project Manager


  • City of Harvard: “The City of Harvard has partnered with Hartwig Plumbing & Heating Inc. on numerous projects since the company’s inception in our community in 1955. The expertise and customer focus displayed by your firm continues to make Hartwig Plumbing & Heating a leader in their field throughout northern Illinois and southern Wisconsin.” “…continues to demonstrate quality craftsmanship and professionalism that results in total customer satisfaction.” Jay T. Nolan, mayor
  • Jack D. Franks: “We really appreciate the excellent service.” Jack D. Franks, Illinois state representative 63rd district

Contact Hartwig

Contact us for your next commercial heating or commercial plumbing project by calling us at 855-225-8235 or use our online contact form for your convenience.