Trusted Your HVAC Needs to Hayes Mechanical in St. Louis, MO

When it comes to selecting commercial HVAC companies, it pays to do your homework. For over a century, Hayes Mechanical has specialized in commercial HVAC installation and repair in St. Louis, MO and many other areas across the United States. We have locations in Chicago, Phoenix, Pittsburgh, Omaha, Minneapolis, and Saginaw, MI, employing HVAC service technicians, plumbers, pipefitters, boilermakers, iron workers, electricians, and laborers across 10 states and counting. Our teams are available around the clock for 24-hour emergency service you can count on when you need it. We also offer preventative maintenance agreements to ensure your heating, ventilation, and air conditioning systems remain at peak performance. Reach out to us today to request your commercial HVAC service or installation estimate!

Commercial HVAC Experts to Ensure Your Year-Round Comfort

Commercial buildings need knowledgeable and experienced heating, cooling, and refrigeration technicians to install, repair, and maintain their systems year-round. Our commercial HVAC experts can help your office, restaurant, or processing plant keep its HVAC or refrigeration equipment running optimally. Rely on us for everything from commercial boiler repair to commercial piping and commercial refrigeration repair. We’re equipped to service steel tube boilers, steam and hydronic boiler systems, high-efficiency condensing boilers, deaerators, and more. Aside from HVAC work, we also provide sheet metal ductwork, millwright services, building automation solutions, and wastewater treatment piping.


Best-in-Class Industrial HVAC Services for St. Louis Facilities

Running an industrial facility requires many complex systems, including industrial fans and ventilation systems, process-cooling systems, conveying systems, storage and process pressure vessels, and more. Count on Hayes Mechanical, a full-service mechanical contractor, to provide best-in-class service with uncompromised safety, quality, and integrity when you need industrial HVAC services.


Boiler Repairs, Boiler Installation & Boiler Maintenance Services

In St. Louis, Hayes Mechanical offers excellent commercial boiler repair, installation, and maintenance services. Our staff of highly skilled professionals is available around the clock to work on auxiliary systems as well as powered, atmospheric, and high-efficiency burner systems. Our boiler installation procedure is customized to your commercial company's activities, guaranteeing cost and energy savings. In order to ensure a smooth installation of your commercial boiler, our plan for doing so minimizes the impact on regular business operations and adheres to strict safety regulations. For maximum capacity and to avoid unexpected breakdowns, routine maintenance is essential. For commercial boiler repairs and industrial boiler repairs in St. Louis, Hayes Mechanical offers a dedicated crew.


24/7 Emergency Commercial Plumbing Services and More

Commercial plumbing is one of Hayes Mechanical’s areas of expertise. From domestic hot water systems to facility drainage systems, backflow testing and certification, and pressure relief valve stations, nothing is beyond our reach. Many commercial clients obtain peace of mind through our comprehensive preventative maintenance agreements and 24/7 emergency plumbing services. From high-rise office buildings to condominiums, apartments, museums, and theaters, you can rest assured Hayes Mechanical has the experience and knowledge to exceed your expectations.


Industrial Plumbing Experts Ensure Your Plant Runs Efficiently

From industrial boiler repair to industrial piping, our team has the industrial plumbing expertise and knowledge to ensure your plant, refinery, or factory continues to operate efficiently. Let us upgrade, repair, or replace your main pumping systems, ejector pit systems, potable and process water systems, and more. We keep up-to-date on the best industrial plumbing products and technologies to help your facility continue to grow and thrive.


Why Choose Hayes Mechanical for Industrial Maintenance?

Hayes Mechanical, established in 1918, continues to abide by its founding principles. From day one, Hayes Mechanical has maintained its commitment to safety, quality, and integrity. Now, still a privately held family owned business, we’ve expanded our operations with offices across the country. Exceptional customer service remains one of our cornerstones for success. We’re dedicated to being the best commercial/industrial full service mechanical contractor in the St. Louis area and beyond. Customer satisfaction is our priority, whether you need commercial or industrial maintenance or installation.


Contact Us to Ask About Energy Rebates and More

Our St. Louis, MO commercial HVAC installation, service and repair specialists can help you maintain all types of HVAC systems and equipment. Give us a call today to learn more about our industrial and commercial HVAC services or to request an estimate. If you’re curious about ways to save your company even more money, inquire about utility and energy rebates. We welcome the chance to make your mechanical equipment and systems more energy-efficient. Call us today!

Hayes Mechanical

201 Tower Plaza
Belleville, IL 62220

Phone: (618) 277-1245

After Hours Emergency: (618) 277-1245



Opening Hours

Sunday 07:00 AM - 05:00 PM

Monday 07:00 AM - 05:00 PM

Tuesday 07:00 AM - 05:00 PM

Wednesday 07:00 AM - 05:00 PM

Thursday 07:00 AM - 05:00 PM

Friday 07:00 AM - 05:00 PM

Saturday 07:00 AM - 05:00 PM