Donnelly Mechanical Corporation

Donnelly Mechanical is New York City’s premier provider of innovative commercial HVAC service, maintenance and construction. With over 30 years’ experience and 200+ employees, we serve New York City’s most prominent commercial organizations across a variety of sectors including data centers, healthcare facilities, Class-A office spaces and commercial real estate management firms. 

In July of 2021, Donnelly Mechanical became part of the EQUANS global business line. 

As a leader in MEP and Facility Management in North America, EQUANS North America is made up of a group of companies that are leaders in mechanical and electrical construction, industrial and energy infrastructure, and building services across North America. The entities that make up EQUANS North America include a collaborative group of commercial infrastructure experts that support clients to optimize their energy use and efficiently run their facilities. With offices across the U.S. and Canada, our organization offers a rare combination of wide territorial reach and proven local expertise.