NYC's Go-To for Emergency Repairs & HVAC Service
Chiller down. RTU failed. Heat out at 2am. Denair's certified crews reach your NYC building within 4 hours — any system, any borough, any time. And when the emergency is over, our preventive maintenance plans make sure it doesn't happen again.
System Down?
We Move Fast.
When your chiller trips, your RTU fails, or your boiler goes cold at 2am — you need a certified crew on-site, not a voicemail. Denair runs 12 mobile crews across all five boroughs, 24 hours a day.
On-Site Within 4 Hours
Express dispatch, diagnostics on arrival. No extra travel charge.
OEM-Certified Only
Factory-certified for Trane, Carrier, Daikin, Mitsubishi. No juniors.
Near Your Building
12 crews rotating continuously across all five boroughs.
Accountable After Repair
Every call documented, feeding your PM plan to prevent recurrence.
Reach Us Any Time
Staffed 24 hours a day, 7 days a week — including weekends and holidays.
Prefer to write? We respond the same day.
Submit a Service RequestNon-union labor · Private, public & prevailing wage
Everything Your Building
Needs. One Contractor.
From a 2am emergency to a full LL97 retrofit — Denair handles every stage of commercial HVAC. No handoffs, no hunting for specialists.
Emergency Repairs & Service
Chiller down. RTU failed. Boiler cold at 2am. OEM-certified crews within 4 hours — any system, any borough, around the clock.
Call (212) 365-5115Preventive Maintenance
Starting from $396/year. Customized 2–4 visit schedules built around your systems. Includes a rate-match guarantee.
Get a quoteLL97 Sustainable Compliance
NYC LL97 fines are real and escalating. Denair audits your building, identifies gaps, and engineers the right HVAC compliance pathway.
Learn moreEnergy Management
Advanced automation and controls averaging 30% energy cost reduction. ConEd and NYSERDA incentives navigated on your behalf.
Learn moreAutomation & Controls (BAS/BMS)
Authorized 75F, Honeywell, and Johnson Controls integration. Centralized control, remote monitoring, and predictive alerting.
Learn moreTurnkey HVAC Construction
Full capital improvement projects and complex retrofits — VRF/VRV, DOAS, computer room cooling — zero-disruption project management.
Learn moreVRF / VRV / DOAS Systems
Factory-certified Daikin, LG, and Mitsubishi Electric VRF/VRV installation and service. DOAS for ventilation compliance and indoor air quality.
Learn moreAir & Water Test & Balance
Precision balancing of air and hydronic systems to ensure designed performance, code compliance, and occupant comfort across every zone.
Learn moreComputer Room Cooling
Precision cooling for server rooms and data centers — where temperature and humidity control is mission-critical.
Learn more
Faster Response.
Better Mechanics.
No Surprises.
Most contractors show up once and disappear. Denair is built differently — OEM-certified crews, documented service history, and a PM program designed to prevent the next emergency before it happens.
Emergency Response, Always
24/7 dispatch, 4-hour on-site — across all five boroughs, every day of the year.
OEM-Certified Technicians
Factory-authorized for Trane, Carrier, Daikin, Mitsubishi Electric, LG VRF.
PM That Prevents Failures
Customized maintenance schedules built around your specific systems and usage.
NYC-Native Operations
19 years in five boroughs — NYC building codes, union rules, and logistics mastered.
Real Emergencies.
Real Outcomes.
BrooklynChiller Failure Resolved Overnight — No Tenant Disruption
A 22-story office tower in Downtown Brooklyn lost its primary chiller at 11pm. Denair was on the roof within 3 hours — cooling restored before sunrise. Full repair completed within 48 hours.
to On-Site
Completed
Disruptions
ManhattanRTU Failure During Heatwave — System Back Same Day
A medical office on the Upper East Side lost its rooftop unit mid-morning during a heatwave. Denair arrived within 2 hours, sourced OEM Trane parts, and restored cooling the same afternoon.
Arrival
DaySystem
Restored
Reschedules
The BronxHeat Out at 2am in January — Restored Before Dawn
A 200-unit building lost all heat at 2am with temperatures at 14°F. Denair's crew arrived within 4 hours, repaired the primary boiler, and brought all units back to heat by 6am. Zero HPD fines.
Arrival
Restored
Fines
Authorized by the Brands
That Matter in NYC
Factory-certified installation and service across leading commercial HVAC manufacturers. You don't need to find the OEM rep — Denair is them.
NYC's Carbon Law
Is Enforced Now
LL97 levies significant fines on buildings exceeding carbon emission thresholds — and penalties escalate through 2030. Denair gives facility managers a clear, actionable path to compliance.
- Building emissions audit and penalty exposure analysis
- HVAC retrofit and upgrade pathway scoping
- VRF/VRV, DOAS, and heat pump system implementation
- ConEd and NYSERDA incentive program navigation
- Ongoing BAS/BMS monitoring for year-over-year compliance
All Five Boroughs.
One Contractor.
Denair maintains active crews across every NYC borough. Response times and service standards are identical everywhere.
Brooklyn
HQ · 8319 20th Ave.
Manhattan
Midtown to Lower Manhattan
Queens
Commercial & mixed-use
The Bronx
Full borough coverage
Staten Island
Full borough coverage
Every Building Type.
One HVAC Partner.
From 30-story office towers to data centers — every building type has its own HVAC demands. Denair's OEM-certified crews are trained across all of them, with 19 years of NYC mechanical experience.
New York City's Top Businesses
& Property Owners
Call Us. Request Service.
We Respond Same Day.
Emergency repair, PM quote, LL97 assessment, or a full system retrofit — reach out and a Denair HVAC specialist gets back to you the same business day.
What Facility Managers
Say About Denair
Trusted by building managers across all five NYC boroughs.
Our chiller failed at 10pm on a Friday. Denair had a crew on-site within 3 hours and cooling restored before our tenants arrived Monday morning. No one else in this city moves that fast.
We switched our PM contract to Denair two years ago and haven't had a single emergency call since. Their preventive maintenance is actually preventive — not just a checkbox exercise like our previous contractor.
Denair guided us through our entire LL97 compliance process — from the audit to the VRF installation to NYSERDA incentive paperwork. We came in under budget and ahead of the penalty deadline. Truly a partner.
I've managed buildings in the Bronx for 15 years and dealt with every HVAC contractor in the city. Denair is the only one I've found that actually picks up the phone at 2am and means it. Worth every penny of the PM contract.
Our server room cooling failed during a critical audit window. Denair diagnosed the issue, sourced a replacement unit, and had our data center back to spec within 18 hours. The team's technical depth is exceptional.
After three other contractors couldn't properly balance our retail HVAC across 12 zones, Denair came in, did a full air and water test & balance, and solved a problem we'd been living with for two years. Immediate difference in comfort complaints.
Questions Facility
Managers Ask
Straight answers about commercial HVAC service, maintenance, and LL97 in New York City.
Emergency or Scheduled —
Denair Shows Up.
790+ NYC locations count on Denair for 24/7 emergency response and preventive maintenance that prevents the next failure before it happens. One call, one partner, every borough.
DenairHVAC.com · Brooklyn, NY · All 5 NYC Boroughs