Strong partnerships with proven subcontractors helps to ensure delivery of high-quality mechanical projects. Xcel Mechanical Systems has developed these important partner relationships to foster cooperation, respect and results on all of our project sites.


Since 1975, Climatec has been making buildings safer, more comfortable and efficient. We are the leading provider of advanced building technologies and energy solutions for thousands of customers every day, And our dedication to delivering an extraordinary customer experience and world-class service has enabled us to become the largest privately-owned building technologies provider in the nation.

Control Works

ControlWorks has evolved into a complete System Integrator to provide our customers with a complete solution regardless of the Building Automation System installed at their site. With the Tridium framework, ControlWorks can integrate virtually any existing BAS and overlay our custom graphics to their system.

GP Strategies

Improve the availability, capacity, and efficiency of your people, processes, and facility. GP Strategies’ innovative tools, consulting, and training will take you to a whole new level of performance.

Mason West, Inc.

Mechanical, plumbing and electrical (MEP) systems represent a high percentage of the total capital investment in majority of buildings. Earthquakes have demonstrated the vulnerabilities of these system if they are not properly seismically braced. Mason West is the leader in seismic brace design with extensive experience, capability and knowledge in all type of facilities.

Siemens Building Technologies Division

Siemens Building Technologies Division is the North American market leader for safe and secure, energy-efficient and environment-friendly buildings and infrastructures. As a technology partner, service provider, system integrator and product vendor, Building Technologies has offerings for fire protection, life safety and security as well as building automation, heating, ventilation and air conditioning (HVAC), and energy management.

Sunbelt Controls

Sunbelt Controls is a leading full-service building automation contractor for new construction and retrofit projects in the Western United States. We provide complete, fully integrated, single source solutions ranging from engineering applications and automated control systems to design assistance, sustainable maintenance service, retro-commissioning and energy rebate supported projects.

Superior Duct Fabrication

We manufacture duct work and sheet metal products for the heating, ventilation, and air conditioning industry, as well as industrial dust collection and exhaust systems. Our goal is to provide superior service and high quality products to our customers to enable them to meet their deadlines.

Trane Commercial

TraneĀ®, a brand of Ingersoll RandĀ®, is a world leader in air conditioning systems, services and solutions. Trane serves engineers, contractors and building owners on all continents and in an array of markets including education, healthcare, government, industrial/manufacturing, data centers, lodging, retail and commercial real estate.