Tri-State Mechanical Services is a full-service HVAC, refrigeration, and mechanical contractor serving commercial, industrial, and residential clients across Greater St. Louis, Jefferson County, and Central Missouri — 24 hours a day, 7 days a week.
A specialist will respond within 1 business hour.
From rooftop HVAC units to walk-in freezers, restaurant hoods to industrial paint booths — Tri-State Mechanical installs, services, and maintains it all.
Emergency repair, installation, and preventative maintenance for commercial refrigeration — restaurants, supermarkets, schools, and food-service operations across St. Louis Metro. Heatcraft Intelligen and CO2-system certified.
Preventative maintenance programs, repair, and installation for commercial and industrial HVAC systems. Custom maintenance schedules to prevent peak-season failures — Trane, Carrier, York, and all major brands.
Exhaust hood installation, repair, cleaning, and full commercial kitchen ventilation for restaurants, hotels, schools, and institutional kitchens throughout Missouri and Southern Illinois.
Storm-damaged AC coil repair, full system replacement, and insurance claim documentation for businesses and homeowners after Missouri's severe weather. Fast turnaround when your roof took the hit.
Streamlined paint booth design, installation, service, and repair for automotive shops and industrial coating operations — including ventilation, filtration, and Missouri air-quality compliance.
Heating and cooling repair, installation, and seasonal maintenance for homeowners in St. Louis, Hillsboro, Farmington, and surrounding communities. Financing available on qualifying new systems.
Sensors on every cooler, freezer, and walk-in. Real-time alerts when temperatures drift — before product loss happens. Cloud dashboards your team can check from any phone.
A single overnight refrigeration failure can cost a restaurant $5,000–$30,000 in spoiled inventory.
Tri-State's monitoring catches temperature drift before it becomes a failure — and routes the alert straight to our 24/7 dispatch when intervention is needed.
When your refrigeration fails on a Friday night or your HVAC goes down in July, you need a contractor who answers the phone and sends a trained technician — not a third-party dispatch service.
Our team has served St. Louis businesses, schools, restaurants, and homeowners since 1989. We know the equipment brands, local codes, and unique climate demands of the Missouri market.
We maintain one of the largest on-hand parts inventories in the region. For older or uncommon equipment, we source parts fast. Less downtime means less lost revenue for your business.
HVAC, refrigeration, kitchen equipment, sheet metal, paint booths — you don't need four different vendors. Tri-State handles the full scope of mechanical work, simplifying project management and accountability.
Our scheduled maintenance programs are built to extend equipment life, reduce peak-season failures, and keep your warranties valid. We service all major brands including Carrier, Trane, York, Lennox, Rheem, and Ruud.
"Greg's calculations for the humidor HVAC load at Stanley's Cigar Lounge were dead on — it's working like a champ. We'll definitely be in touch if we need anything else."
Stanley's Cigar Lounge · St. Louis, MO
| Common Concern | How We Address It |
|---|---|
| Response time in an emergency | Live 24/7 dispatch — same-day emergency service |
| Technicians unfamiliar with our equipment brand | NATE-certified on York, Carrier, Trane, Lennox, Rheem & Ruud |
| Parts delays causing extended downtime | Large in-house parts inventory; fast-source for rare items |
| Surprise charges after the job | Upfront estimates; no hidden service fees |
| One-time fix without a long-term plan | Custom preventative maintenance programs available |
| Common Concern | How We Address It |
|---|---|
| Product loss from refrigeration failure | Emergency response available nights, weekends & holidays |
| Unfamiliar with walk-in cooler systems | Specialists in walk-ins, ice machines & display refrigeration |
| New installation disrupting business operations | Scheduled installations to minimize operational downtime |
| Service only to large chains/supermarkets | We serve independent restaurants, schools, & small businesses |
| Unclear warranty coverage on installed units | Full documentation & warranty support on all installations |
"Greg's calculations for the humidor HVAC load at Stanley's were dead on — it's working like a champ. Your thoughtful analysis of our specific needs made all the difference. We'll definitely call Tri-State first for any future work."
"Our soft-serve machine was installed in a very timely and professional manner. Greg Bruyere was fantastic — informative, extremely helpful in training our associates, and went well beyond what was required."
"The installation of our new walk-in freezer and cooler was smooth and trouble-free. The crew was efficient, polite, and did not interfere with our daily school operations. We were very pleased from start to finish."
A small sample of our portfolio — see all 34 projects on our case studies archive.
Restaurant HVACComplete commercial kitchen ventilation system including rooftop exhaust, make-up air, and hood installation for a new St. Louis restaurant concept.
View Case Study →
Kitchen & HoodsNew commercial exhaust hood system and kitchen ventilation for an upscale St. Louis sushi restaurant, including fire suppression system coordination.
View Case Study →
Commercial RefrigerationDesign and installation of a complete commercial refrigeration system for a St. Louis area supermarket — including walk-in coolers, freezers, and display refrigeration.
We make mechanical contracting straightforward. No runaround, no surprise subcontractors, no guesswork.
Reach us by phone at (314) 423-5555 or submit a service request form. For emergencies, we dispatch immediately — 24/7.
A NATE-certified Tri-State technician arrives, evaluates the system or project, and provides a transparent, upfront estimate before work begins.
Our fully stocked service trucks and in-house fabrication capability allow us to complete most repairs and installations in a single visit.
After service, we document the work, provide all warranty information, and discuss a preventative maintenance schedule to protect your investment long-term.
Founded in 1989 and headquartered at 2338 N. Lindbergh Blvd, St. Louis, MO 63114, Tri-State Mechanical Services Inc. is a family-owned and operated mechanical contracting company with over 37 years of service across the Greater St. Louis Metro area, Jefferson County, Central Missouri, and Southern Illinois.
We serve educational institutions, multi-story apartment complexes, hotels, restaurants, commercial office buildings, industrial facilities, and residential homes. Our scope of work includes HVAC system design-build, commercial refrigeration, restaurant kitchen equipment, industrial ventilation, custom sheet metal fabrication, and automotive paint booths.
We are not a franchise. Every technician who comes to your property works directly for Tri-State — trained, vetted, and accountable to the standards we've upheld since 1989.
Brands We Service:
York · Lennox · Carrier · Rheem · Ruud · Trane · Heil · American Standard · Goodman · Daikin · Mitsubishi · McQuay · and all other major brands
Tri-State Mechanical Services operates from three locations to serve the Greater St. Louis Metro area, Jefferson County, Southeast Missouri, Central Missouri, and Southern Illinois.
Whether it's an emergency repair, a new system installation, or a long-term maintenance partnership — Tri-State Mechanical Services is ready to help, 24 hours a day.
📞 Call (314) 423-5555 Request a Free Estimate