Total Mechanical Services

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About Total Mechanical Services
Total Mechanical Services operates as a strictly commercial mechanical contractor based in Del City, serving Oklahoma City, Tulsa, and facilities statewide. The company holds Oklahoma license #9814 and maintains an ASME "R" Stamp certification alongside ASHRAE membership, reflecting specialized competency in high-stakes industrial environments. All three client reviews award a perfect 5-star rating, with consistent mentions of the team's technical knowledge and responsiveness to emergency situations. Operating hours span Monday through Friday, 8 AM to 5 PM, with 24/7 emergency dispatch available for critical system failures.
What distinguishes Total Mechanical Services is their focus on critical facilities where downtime creates significant operational and compliance exposure. The company maintains ISNetworld certification and OSHA compliance status, streamlining vendor onboarding for commercial and industrial clients. Their service capabilities extend across Trane, York, Carrier, and McQuay systems, with specialized expertise in chillers rated up to 100 tons and industrial boilers requiring ASME repair certification. The 24/7 dispatch service guarantees rapid response for facilities where climate control failure threatens operations, production uptime, or regulatory compliance.
One reviewer, the executive director at Autumn House Senior Living, described working with Darrell and his team during a major chiller replacement project involving 70- and 100-ton systems. The reviewer noted Darrell worked tirelessly to minimize stress during the replacement while the facility awaited new equipment arrival. Another reviewer highlighted the team's efficiency, trustworthiness, and responsiveness, specifically mentioning their ability to diagnose complex issues that previous contractors could not resolve.
What Customers Say
All three reviews award 5 stars, with each mentioning specific technicians by name and describing successful resolution of complex chiller and HVAC system failures.
Working Hours
| Sunday | Closed |
| Monday | 8 AM–5 PM |
| Tuesday | 8 AM–5 PM |
| Wednesday | 8 AM–5 PM |
| ThursdayToday | 8 AM–5 PM |
| Friday | 8 AM–5 PM |
| Saturday | Closed |
Services
Commercial Chiller Services
Emergency diagnostics, overhauls, and contingency cooling for critical uptime facilities, including systems up to 100 tons.
Industrial Boiler Services
ASME R-Stamp repair capability, inspection readiness, and safety-first execution for industrial boilers.
HVAC & Ventilation Systems
RTUs, MAUs, AHUs, and VAV systems with ventilation and pressure control for commercial buildings.
Building Automation & BAS
BAS troubleshooting, sequencing fixes, and VFD optimization without system instability.
Process Piping
Code-minded repairs, tie-ins, and fabrication with testing and documentation.
Preventative Maintenance
Planned maintenance agreements offering predictable costs, priority response, and fewer emergency calls.
Emergency Rental Chiller
Contingency cooling solutions for facilities experiencing critical chiller failures.