Leading Team of Certified HVAC Technicians Ready to Diagnose and Resolve Your Commercial HVAC Issues

Donnelly’s field service technicians have the skills and expertise to give you fast, worry-free resolutions to any commercial HVAC problem.

Donnelly’s professional staff of licensed and certified technicians  arrive in uniform and with proper identification to ensure the safety of your building and its occupants. Choose the best Commercial HVAC Repair Service in NYC. Learn more about why Donnelly Mechanical is the premier provider for HVAC Repair Service  in New York City here.

How Donnelly Mechanical Benefits You

Rapid Response Time

From complete system failure to restoring optimal system performance, our emergency service team will get your HVAC systems up and running so you can get back to business. We are available 24 hours a day, 7 days a week, 365 days a year. Around the clock, we maintain a full emergency service crew, including supervisors and technicians.

Unique NYC Zoning System

Ensuring prompt response when you need it most, Donnelly dispatches our certified technicians according to a strategic zoning system throughout Manhattan. Along with a fleet of more than 100 branded service vehicles and over 30 on-foot technicians, our typical response time is among the fastest in the industry, allowing us to resolve your emergencies quickly and efficiently.

Manufacturer Certified Technicians

Our staff is trained and certified to work on all major manufacturers’ lines of HVAC equipment. In addition to these certifications, ongoing trainings are required for all staff to maintain and increase technical expertise in our industry.

Executive Involvement

Donnelly understands the importance of having access to the top, which is why our executive team is always available to help you with your Commercial HVAC Repair needs when you require resolutions as quickly as possible.

Commercial HVAC Industries We Serve

Business Commercial HVAC

Custom HVAC repair and maintenance services for NYC businesses deliver quantifiable cost savings.

Read More

Data Center

Increased efficiency and reliability for mission critical data center and IT systems.

Read More

Financial Industry

CRAC unit reliability and efficiency for New York City’s financial sector.

Read More

Healthcare Facility and Hospital

Expert healthcare facility and hospital HVAC repair and maintenance services customized for your facility’s unique needs.

Read More

As a 35 year veteran within the commercial building industry, I’ve had the pleasure of working with Donnelly Mechanical on many projects, both large and small, throughout the past 30 years. One of the more recent projects I’ve worked on with them was the first phase of an ongoing HVAC unit retrofit. The project, although extremely complex, was a great success. We received the professional experience I’ve come to expect from the Donnelly team. Their support, communication, and ability to finish the job properly and on time is second to none. From the executive team to project management and technical support, the entire Donnelly team offers a personal support system and prompt reply to any and all requests during every phase of a project – a level of service that is hard to find in the industry today.

— CHIEF ENGINEER SILVERSTEIN PROPERTIES

FAQ

We service all types of commercial HVAC systems, including rooftop units, chillers, boilers, air handlers, VRF/VRV systems, and more. Our experienced technicians are trained to diagnose and repair equipment from all major manufacturers.

We provide 24/7 emergency HVAC service with rapid response times throughout New York City. Our team is available around the clock to minimize downtime and restore system functionality as quickly as possible.

Yes. We offer customized maintenance and service agreements tailored to your company’s needs. These agreements help maintain peak efficiency, reduce downtime, and extend the lifespan of your HVAC equipment.

  • Contact our service department: Let us know you are a new customer.
  • Submit onboarding form: Fill out a brief form to set up your account.
  • Schedule a visit: A service coordinator will arrange for a technician to assess your system.
  • Initial troubleshooting: The technician will attempt to resolve the issue during the first visit.
  • Follow-up visit: If the issue cannot be resolved during the first visit, the technician will advise if a follow-up visit is needed for further troubleshooting.
  • Quote for repairs: If applicable, the technician will provide a quote with recommended repairs.

You can request emergency HVAC service by calling our 24/7 line at 718-886-1500. Our team will dispatch a certified technician to assess and repair your system as quickly as possible.

We are New York City’s premier mechanical contractor, trusted by over 1,700 companies for reliable HVAC service. Our benefits include:

  • Rapid Response Time:
    • From complete system failure to restoring optimal system performance, our emergency service team will get your HVAC systems up and running so you can get back to business.
    • Available 24 hours a day, 7 days a week, 365 days a year.
    • Around the clock, we maintain a full emergency service crew, including supervisors and technicians.
  • Unique NYC Zoning System:
    • Ensuring prompt response when you need it most, Donnelly dispatches our certified technicians according to a strategic zoning system throughout Manhattan.
    • With a fleet of more than 100 service vehicles and over 30 on-foot technicians, our typical response time is among the fastest in the industry, allowing us to resolve your emergencies quickly and efficiently.
  • Manufacturer Certified Technicians:
    • Our staff is trained and certified to work on all major manufacturers’ lines of HVAC equipment.
    • Ongoing trainings are required for all staff to maintain and increase technical expertise in our industry.
  • Executive Involvement:
    • Donnelly understands the importance of having access to the top, which is why our executive team is always available to help you with your Commercial HVAC Repair needs when you require resolutions as quickly as possible.

Regular preventive maintenance is the best way to prevent unexpected failures. Our customized maintenance agreements are designed to keep your HVAC system running at peak efficiency and reduce the likelihood of emergency repairs.

Getting started is easy. Contact us today to discuss your HVAC service needs by filling out the form below.

Talk with us about
Commercial HVAC

Fast Response and a Worry-Free Resolution

(718) 886-1500