NAC Mechanical & Electrical Services

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Claim This BusinessAbout NAC Mechanical & Electrical Services
NAC Mechanical & Electrical Services operates as a commercial-focused mechanical contractor serving the Twin Cities region since 1984. Based in St Paul, MN, the company holds a 3.6-star rating derived from 33 customer reviews. Their client base centers around building owners and facility managers across commercial properties, healthcare facilities, multi-unit residential complexes, educational institutions, and government agencies. The business maintains standard weekday service hours from 9 AM to 5 PM, with 24-hour emergency availability for existing clients.
The company distinguishes itself through several specialized capabilities. NAC functions as a Platinum Alerton Dealer, offering building intelligence and automation systems paired with low voltage and security installations. Their in-house sheet metal fabrication and custom pipe fitting services support retrofit and new installation projects. The firm provides engineering and design services alongside their installation crews, enabling a turnkey approach from conceptual phase through commissioning. Their distribution network supplies contractor-grade equipment including boiler and burner systems.
Customer experiences shared in reviews reveal mixed outcomes. One reviewer with a decade-long relationship describes consistent professionalism and skilled technicians who resolve issues correctly on first attempt. Another customer detailed a contested $600 diagnostic charge where the technician could not identify a leaking problem, noting the company bills for travel time regardless of actual work performed. A third reviewer reported severe delays exceeding four months on a hood installation with continued postponements. The company employs technicians available around the clock for emergency dispatch.
What Customers Say
One positive review praises the company's professional technicians and reliable repairs over ten years, while four negative reviews cite billing disputes, unresponsive communication, project delays exceeding four months, and rudeness across multiple interactions.
Working Hours
| Sunday | Closed |
| Monday | 9 AM–5 AM |
| TuesdayToday | 9 AM–5 AM |
| Wednesday | 9 AM–5 AM |
| Thursday | 9 AM–5 AM |
| Friday | 9 AM–5 AM |
| Saturday | Closed |
Services
HVAC Installation & Retrofit
New construction and existing system upgrades for commercial heating and cooling infrastructure.
Electrical & Low Voltage Systems
Complete electrical wiring alongside security cameras, access control, and building automation cabling.
Plumbing & Piping
Commercial water infrastructure, pipe fitting, and specialized piping for industrial applications.
Sheet Metal Fabrication
Custom ductwork and metal components fabricated in-house for precise project fit.
Boiler & Burner Systems
Installation and maintenance of commercial heating boilers designed for energy efficiency goals.
Building Intelligence & Automation
System integration for automated controls, monitoring, and smart building management platforms.
Emergency Repair Services
Round-the-clock dispatch for HVAC, electrical, plumbing, and system failures.
Preventive Maintenance Contracts
Scheduled servicing to maintain system efficiency and extend equipment lifespan.