With its roots dating back to 1915, Bahnson has drawn on its rich history and reputation as a leader in the design, fabrication, and installation of specialized HVAC systems, and today with recent order intake exceeding $200 million annually, Bahnson, providing services through three business units, is one of the largest specialty engineering, manufacturing, and mechanical contractors in the United States.

Bahnson is known by the company it keeps, and the services it provides to the some of the largest engineering and construction companies and ethical drug manufacturers in the world. The same level of service and expertise is also provided to local companies known only within their communities. The common thread between large and small is the value added service to clients who require the highest level of guaranteed system quality, performance, and reliability.

Bahnson's sustained growth in revenue and profitability has been intentional using an acquisition strategy coupled with an improvement of market share in the specialty sectors served.