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37 Years
experience
Emergency
services
Your Trusted HVAC & Refrigeration Partner in St. Louis
Tri State Mechanical Services has been a trusted name in HVAC and mechanical contracting since 1989. Our family-owned business combines decades of experience with factory-trained professionals to deliver exceptional reliability in heating, ventilation, air conditioning, refrigeration, and steel fabrication. Serving St. Louis, Central Missouri, and Southern Illinois, we specialize in commercial and residential projects, offering 24/7 emergency services and comprehensive maintenance programs. Our commitment to quality is reflected in our long-term client relationships and a track record of exceeding industry standards. We pride ourselves on honest, dependable service, ensuring every project benefits from precise equipment sizing, energy-efficient solutions, and expert technical support.

With extensive parts inventory and rapid response times, we minimize downtime for businesses reliant on critical cooling systems. Our teams expertise spans industrial paint booths, commercial kitchens, refrigeration installations, and HVAC upgrades for educational facilities, multi-family housing, and healthcare institutions. Recognized for integrity and craftsmanship, we back our work with guarantees and prioritize customer satisfaction in every interaction. From initial consultation to post-installation support, we provide tailored solutions that align with client needs and budgetary goals.
Services
Commercial HVAC Repair Residential AC Service Refrigeration Installation Emergency HVAC Service Maintenance Programs Industrial Refrigeration Walk-in Coolers/Freezers Paint Booth Services Sheet Metal Fabrication Dehumidification Systems
Details
  • Year established: 1989
Highlights and features
  • We have over 30 years of experience in HVAC and refrigeration services.
  • Our team consists of factory-trained technicians with extensive expertise.
  • We offer 24/7 emergency service with rapid two-hour response times.
  • Our maintenance programs reduce downtime and extend equipment lifespan.
  • We service all major HVAC and refrigeration brands, including York and Carrier.
What people say
24/7 emergency support Factory-trained technicians Quick response times Quality installations Dependable service
Services
Commercial HVAC Repair
Our technicians provide expert repair services for commercial HVAC systems, including rooftop units, chillers, and ventilation systems. We service all brands and prioritize rapid diagnosis to minimize operational disruptions. With 24/7 emergency availability, we ensure businesses maintain climate control year-round.
Refrigeration Installation
We design and install commercial refrigeration systems for walk-in coolers, freezers, and industrial applications. Our solutions optimize energy efficiency and comply with industry standards. From initial calculations to final setup, we guarantee precise equipment sizing and seamless integration with existing infrastructure.
Emergency HVAC Service
Our 24-hour emergency service addresses urgent HVAC failures with rapid two-hour response times. Equipped with extensive parts inventory, we resolve critical issues for residential and commercial clients, preventing prolonged downtime and costly damage from system failures.
Maintenance Programs
Customized maintenance agreements extend equipment lifespan and prevent unexpected breakdowns. Our technicians perform comprehensive inspections, cleaning, and adjustments to ensure optimal performance. Clients receive priority service and discounted rates on repairs under active maintenance contracts.
Industrial Refrigeration
We specialize in industrial refrigeration systems for cold storage warehouses, food processing facilities, and laboratories. Our services include cascade freezer installations, glycol system repairs, and compliance with safety regulations. We minimize energy costs while maintaining precise temperature control for sensitive operations.
People
Greg Bruyere
HVAC Specialist
With over 20 years of experience, Greg Bruyere leads complex HVAC installations and refrigeration projects. Recognized for precise system calculations and client-focused solutions, he ensures every project meets technical and operational requirements while maintaining Tri-State's quality standards.
Questions
Do you offer 24/7 emergency HVAC services?
Yes, we provide 24/7 emergency HVAC repair services with a two-hour response time for urgent issues.
What areas do you serve?
We serve St. Louis, Central Missouri, Southern Illinois, and surrounding areas including Ballwin, O'Fallon, and Chesterfield.
Do you service both residential and commercial clients?
Yes, we offer HVAC and refrigeration services for residential homes, commercial businesses, and industrial facilities.
Are maintenance contracts available?
Yes, we offer customizable maintenance agreements with priority service and discounted repair rates for ongoing system care.
What HVAC brands do you service?
We service all major brands including York, Carrier, Lennox, Rheem, Ruud, and Trane for repairs and installations.
Can you install commercial refrigeration systems?
Yes, we design and install commercial refrigeration systems for walk-in coolers, freezers, and industrial applications.
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