For New Clients Only
Let Us Solve Your
Biggest HVAC Headache.Talk to a Donnelly Tech!
Have a commercial HVAC issue? Start with a technical conversation upfront to reduce guesswork and avoid unnecessary delays. Talk through what you’re experiencing with a knowledgeable expert and get an informed perspective to help point you in the right direction.
No sales pitch
NYC-based supervisor
Talk to a Donnelly Technician
Not sure who to call or what the issue really is? Start with a conversation. Fill out the form below or text us at 718-886-1500 to connect with our team.
Prefer to call or text right now?
Three steps. Zero guesswork.
Commercial HVAC issues are often misdiagnosed before the first onsite visit. We flip the process: technical discussion first, then a clear strategic path forward with the right team.
1
Tell us the issue
Submit the form or text us. Describe what’s happening — symptoms, system type, urgency. One sentence is fine.
2
Talk to a field supervisor
If it’s a strong fit, we connect you directly with an experienced field technician who asks the right technical questions and identifies the best starting point.
3
Get a clear path forward
Service call, deeper troubleshooting, or a capital project—you walk away with a clear path forward and know exactly which team to start with.
Built for complex commercial buildings
Our field supervisors work on these systems every day across NYC. If your building fits one of these profiles, we speak your language.
Class-A Office
Hospitals & Healthcare
Law Firms
Financial
Data Centers
Multi-Site Portfolios
Why the call is worth 15 minutes
Donnelly has serviced NYC’s most technically demanding buildings for three decades. Our field supervisors aren’t readers of a script.
30+
Years in NYC
24/7
Emergency Response
1,700
Maintenance Clients
30 min
Response SLA
Field supervisors, not call-center staff
You talk to the same people who run jobs on Class-A buildings across NYC every week.
System-agnostic diagnostics
Chillers, CRAC units, cooling towers, VRF, BMS integration — we've serviced it all and will tell you what's actually wrong.
Regulatory fluency
Local Law 97, ASHRAE, EPA, NYC cooling tower registration — we work inside these every day.
No pressure, no pitch
If the right answer isn't Donnelly, we'll tell you. The goal of this call is a clear diagnosis — not a sale.
Quick questions
Yes. One conversation with a Donnelly field supervisor, no cost, no obligation. If the conversation points toward work we can do, we’ll quote it separately — and you’re free to walk away.
A Donnelly field supervisor — someone who actively runs commercial HVAC jobs across NYC. Not a BDR, not a dispatcher. If your issue calls for deeper specialization, we’ll loop in the right engineer or project manager on the spot.
Call 718-886-1500 directly — we run 24/7 emergency service across NYC. If a tech needs to be on-site today, we can dispatch.
That’s fine. Many facility teams use this as a no-commitment second opinion — especially on diagnoses that don’t feel right or quotes that seem inflated. We’ll give you a straight read.
Ideally: system type (chiller/CRAC/cooling tower/etc.), symptoms, when it started, and any recent service history. Don’t worry if you don’t have it all — we’ll help you figure it out.
Still not sure what’s going on?
Let’s figure it out together.
15 minutes with a Donnelly field supervisor — free, no commitment, no pitch.
Get in Touch