Specializing in Industrial & Commercial
Repair, Sales & Installation

As a full-service Energy Conservation contractor, we provide Complete Solution, Factory Certified installers and Competitive rates. For free estimates and 24hr Emergency Service, the right commercial HVAC contractor is only a call away.


Licensed Commercial Heating and Cooling Conctractor

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 in 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.

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.

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

Recent Projects

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

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

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.

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.

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.

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

Request More Info & Request a Free Estimate - Click Here

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

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