Therma Holdings Announces Expansion of Mechanical Services Offering in Phoenix, Arizona

SAN JOSE, Calif.–(BUSINESS WIRE)–Therma Holdings (“Therma”) today announced that the leading mechanical contractor in Arizona, Bel-Aire Mechanical (“Bel-Aire”) has joined Therma. This further expands Therma’s reach as the leading end-to-end provider of energy and sustainability solutions and services for high-performance buildings. The combined entities play critical roles in reducing environmental impact within the built environment across the United States.

Bel-Aire is a Phoenix-based specialty mechanical and plumbing services provider offering systems installation, service, repair, maintenance, and fabrication to customers in the data center, semiconductor, biopharma, higher education, and healthcare end-markets.

Bel-Aire expands Therma’s offerings, bringing over 400 professionals focused on designing, building, and servicing complex systems for mission-critical buildings. Together, the company will offer comprehensive services and solutions to address the entire lifecycle of a building. This transaction will also expand Therma’s geographic reach across the United States and its presence in critical and growing end markets – a key focus of the company.

Jeff Sprau, CEO of Therma, said, “Bel-Aire is a wonderful addition to the Therma family. Their full-suite of mechanical and plumbing solutions for mission-critical environments are a great fit and expand our customer and geographic reach. The Bel-Aire team shares our collaborative culture, values, and commitment to delivering superior service and value to our customers. We are looking forward to partnering with the entire Bel-Aire organization to continue to grow the business in the Arizona market.”

Jim Dinan, President of Bel-Aire, said, “We are excited to be joining the Therma family and building upon the work we’ve done over the past 35 years to serve our customers, propel our growth, and provide new opportunities for our employees.”

About Therma Holdings LLC

Therma Holdings, a Blackstone portfolio company, is a leading mechanical, electrical, plumbing, controls, and energy services company focused on designing, engineering, building, and servicing complex systems in high-performance buildings. Additionally, Therma Holdings offers environmental, social, and governance consulting and advisory services focused on designing and implementing solutions tailored toward improving sustainability and energy efficiency. Headquartered in San Jose, CA, Therma Holdings has additional offices throughout the US. For more information, please visit

About Bel-Aire Mechanical

Bel-Aire specializes in designing, building and servicing high-performing facilities by providing end-to-end construction, service, repair and maintenance, and fabrication solutions. Bel-Aire is recognized as a market leader with significant expertise in the data center end market, leveraging advanced in-house fabrication capabilities. Bel-Aire’s in-house engineering staff and service department offer design-build project delivery and ongoing preventative and emergency maintenance to serve the full lifecycle of their customers’ facilities. For more information, please visit


Brooks Corcoran