Donnelly Mechanical is New York City’s premier mechanical contractor specializing in HVAC construction, service, maintenance, equipment replacement, and energy efficiency strategies and solutions.
Our Mission: Getting Greener Every Day
To become your trusted energy advisor.
Our Values: Do the Right Thing
To meet/exceed internal and external customer requirements with the utmost of professionalism, teamwork, integrity and respect with cost efficient and environmentally friendly HVAC and Energy initiatives.
Donnelly Mechanical’s credentials include:
- Donnelly Mechanical is a widely-regarded HVAC contractor providing both construction and maintenance/emergency services in the New York City area.
- Established in 1989, we have grown to become one of the largest HVAC contractors in our service area, with clients ranging from small independent businesses to large corporations.
- Donnelly Sustainable Energy Services (Donnelly SES) provides leading edge energy consulting services, with an expertise in identifying all available rebates and tax incentives for our clients’ projects.
- The majority of our customers are commercial tenants, building owners and building managers in the five boroughs of New York City as well as Nassau, Suffolk and Westchester Counties.
- The Donnelly team has over 120 employees and we currently operate over 90 service vehicles.
- Our clients include many of New York City’s most prominent corporations, national retailers and financial institutions, such as Reuters, Major League Baseball, Bank of America and Latham & Watkins, among others.
- We are a woman-owned business, certified by New York City, New York State, NY/NJ Port Authority and WBENC.
View our certificates [PDF]
- We are proud to be at the forefront of environmentally friendly construction and maintenance practices with projects and staff that are LEED-certified by the U.S. Green Building Council.
