New York City’s Premier Mission Critical HVAC Systems Contractor

Donnelly Mechanical has commissioned millions of square feet of state-of-the-art data center and mission critical HVAC facilities throughout New York City.

For more than thirty years, our experienced team of engineers, CEMs and technicians have worked on new HVAC construction as well as legacy HVAC commissioning projects that have special accreditation requirements, privacy requirements, and the need for uninterrupted uptime.

Experience & Technical Expertise

From initial survey through project completion, the Donnelly Mechanical team manages the entire mission critical HVAC commissioning process. Delivering projects on-time and on-budget, our experienced team coordinates with contractors, engineers, and all project members to mitigate risk and ensure performance.

NYC HVAC Commissioning

Donnelly’s BIM capabilities were a real asset, providing us with a failsafe way to accurately plan for the costs and logistics well in advance. We really appreciate Donnelly’s expert project management and attention to the details… it’s difficult to do a project of this size without any issues. Donnelly does such a great job. They made the entire process seamless and painless.

– Boston Properties

Need more information? Call Donnelly Mechanical at (718) 886-1500 today.

Fast response and a worry-free resolution – that’s The Donnelly Difference.