One of the Best Service Companies in the United States
When you choose to employ Donnelly Mechanical for your HVAC and energy service needs, you’re aligning with one of the best service companies in the United States – this is the Donnelly Difference.
From our technicians and project managers to the executive team, all employees are certified by some of the nation’s most recognized professional contracting organizations. We also ensure we are in full compliance with all federal and local regulations, sometimes even surpassing requirements formulated by these standards. Whatever your HVAC or energy concern, you can rest assured that your Donnelly team will handle it with the utmost care and confidence.
Led by CEO Dan Donnelly, our expert team is comprised of 140 industry professionals and 95 skilled craftsmen, including senior-level staff with LEED-accreditation from the U.S. Green Building Council. We hold WBE certifications from the City and State of New York as well as the Port Authority of New York/New Jersey. We’re one of the select MSCA Green Star contractors in the USA and our headquarters recently received ENERGY STAR certification from the U.S. Department of Energy.
The Mechanical Service Contractors of America (MSCA) is the nation's leading trade association representing the heating, ventilation, air conditioning and refrigeration (HVACR) service contractors. MSCA STAR is an achievement designation for service excellence awarded to an elite group of mechanical service contractors. MSCA STAR companies have demonstrated they offer commercial business and facilities customers unsurpassed support, quality workmanship and safe and reliable service.
We are the only commercial HVAC service provider in NYC with a Certified Energy Manager (CEM) qualification. This certification ensures that when you work with Donnelly all your energy projects are properly handled from planning through completion.
Our entire team goes through rigorous OSHA training to ensure prevention of safety and health hazards on and off the job.