Specializing in HVAC & Food Service Equipment


Commercial Refrigeration

Installation, Sales, Repair, & Service

  • Professional team of technicians
  • Honest, Dependable Service 24/7
  • Servicing all brands including

We service york lennow carrier rheem ruud trane

St. Louis Commercial Hvac Service

As a full-service Energy Conservation contractor, we provide Complete Solution, Factory Certified installers and Competitive rates.

We maintain extensive records of the services we provide–so you won’t have to.

We provide both in-house and factory training and technical support for our technicians. Our support staff has the training, experience and resources to assist the field technician and answer any technical questions they may run into. The technician is free to continue working instead of researching.

Common Project Types

  • Apartments
  • Hotels
  • Condominiums
  • Retail Stores
  • Restaurants
  • Schools/Colleges
  • Churches
  • Warehouses
  • Superstores
  • Malls
  • Office Buildings
  • Police/Fire Stations
  • Golf Clubhouses
  • Senior Housing
  • Retrofits
  • State & Federal Projects
  • Manufacturing Facilities
  • Animal Facilities


Ask about our Maintenance Agreements which are designed to keep you safe, keep equipment running efficiently and save on unwanted service calls. All maintenance agreements are subject to discounted rates and priority service.

For free estimates and 24hr. Emergency Service. The right commercial hvac contractor is only a call away.

Give us a call. You’ll be glad you did.

Request More Info & Request a Free Estimate - Click Here

Recent Projects

Barbara Larson Godiva Chocolatier, Inc
Our Soft Serve machine was installed in a very timely and professional manner. The specialist that installed the machine, Greg Bruyere was fantastic! He was informative and extremely helpful in training myself and the associates. He even... Read More >
Bridget at Pattonville Highschool
The installation of our new freezer/cooler was smooth and trouble free.  We are happy with the finished product and were well informed through the installation process of any changes in the time line due to unexpected conditions.  The crew was efficient, polite, and did not interfere with our daily processes.  We were very pleased with the process from start to finish.
Stanley’s Cigar Lounge
Thanks again Greg for all your hard work and thoughtful analyzation of our HVAC needs for the humidor at Stanleys Cigar Lounge. Your calculations for the load with all the humidity we are pumping into the room was dead on and it’s working like a champ. Again, thanks, we will be in touch if we need anything else. Best Regard

Its Our Character That Sets Us Apart & Our Quality Commitment Is First Priority.

Specializing in Industrial & Commercial HVAC Repair, Sales & Installation.

As a leader in the greater Saint Louis area, your complete comfort and satisfaction are our promise to you. Tri State Mechanical consistently delivers ultimate quality Commercial HVAC services.

Our dedicated team excel in customer satisfaction by always providing our clients with on-time, affordable and professional heating and cooling repair service.

We guarantee only the best service without compromise. Excellence in everything we do is our commitment to you.

Whether it be New Construction, Hvac Maintenance Service, Upgrades or Emergency Service you can rely on us as your long term partner for quality and dependability.

We service all brands, types and sizes of HVAC systems including: Furnaces, Air Conditioners, Glycol Systems, Boilers, Chillers, Roof Top Units, Indoor Air Filtration and Ventilation systems.

Our workmanship is guaranteed and backed by our company name that has been serving the St. Louis Metro, Central Missouri and Southern Illinois area since 1989. With Tri State all your heating and cooling equipment will be good hands 24/7.