QuesTec Commercial HVAC & Mechanical Contracting
Keep your building systems reliable, efficient, and ready for every season—backed by experienced technicians, proven processes, and responsive service teams.
Reliable craftsmanship.
Modern building performance.
QuesTec has delivered HVAC service, maintenance, and mechanical contracting since 1996. Our teams use smart diagnostics, efficient workflows, and safety-first practices to reduce downtime, extend equipment life, and lower operating costs, without cutting corners.
Years in Business
Years Industry Experience
Choose the support you need
From design and installation to complex system upgrades, we help owners and project teams deliver high-performing mechanical systems on schedule and on spec.
- Design/build & preconstruction support
- System replacements & retrofits
- Energy-focused upgrades and optimization
Prevent breakdowns, control costs, and improve comfort with proactive service plans built around your building’s needs.
- Preventive maintenance programs
- Repairs and troubleshooting
- Performance and efficiency tuning
Why building owners and facility teams choose QuesTec
Fewer Disruptions
Proactive maintenance and fast troubleshooting reduce downtime.
Lower operating costs
Energy optimization and smart controls keep systems efficient.
Longer equipment life
Better care means fewer surprise replacements.
A partner you can count on
Clear communication, safety, and consistent workmanship.
Meet QuesTec
Local Offices. Regional Reach.
No matter where you’re located in Missouri, Arkansas, Kentucky or Florida, our teams are nearby. We have offices in Columbia, St. Louis, Kansas City, Springdale, Louisville, and Sarasota, so help is never far away.
Check out some of our favorite projects
MU Veterinary Medical Diagnostic Laboratory
Fire Station #11
Boone County Sherriff Training Center
HVAC systems we design, service, and optimize
- Chillers & boilers
- Cooling towers
- Rooftop units & split systems
- VAV, VRF & hydronic systems
- Controls & automation systems
- Humidity control solutions
- Energy projects & optimization
Need service or planning a mechanical project?
Tell us what you’re working on and we’ll recommend the next best step.