24/7 Emergency Repairs
Around-the-clock response for critical Carrier RTU failures. Manufacturer-trained technicians arrive fully equipped—typically within 4 hours—to diagnose and restore your rooftop unit with minimal operational disruption.
Manhattan's dense commercial buildings and extreme seasonal swings put real strain on rooftop HVAC equipment. Denair HVAC's certified technicians specialize in diagnosing and repairing Carrier rooftop units across Midtown, Downtown, and beyond—delivering same-day service, transparent pricing, and repairs backed by manufacturer-trained expertise to keep your building comfortable and compliant year-round.
Comprehensive repair, maintenance, and emergency support for Carrier RTUs across Manhattan's commercial and mixed-use properties.
Around-the-clock response for critical Carrier RTU failures. Manufacturer-trained technicians arrive fully equipped—typically within 4 hours—to diagnose and restore your rooftop unit with minimal operational disruption.
Thorough system diagnostics covering compressors, heat exchangers, controls, and refrigerant circuits on all Carrier rooftop unit models, restoring peak performance and extending equipment life.
Scheduled maintenance plans tailored for Carrier RTUs, including filter changes, coil cleaning, controls calibration, and system checks that prevent costly breakdowns and reduce energy consumption.
Targeted retrofits and tune-ups for aging Carrier rooftop units—modernizing controls, improving efficiency, and meeting NYC energy standards without requiring full equipment replacement.
Expert guidance ensuring your Carrier RTU operations comply with NYC's Local Law 97 sustainability mandates, helping Manhattan building owners avoid penalties and optimize energy performance.
Certified air testing and balancing services following Carrier RTU repairs or upgrades, with detailed reports confirming systems are operating at peak performance and code-compliant airflow levels.
Contact our team by phone and we'll dispatch a manufacturer-trained Carrier technician—typically within 4 hours across Manhattan. We accommodate tight building schedules common in Midtown high-rises and mixed-use properties.
See how Manhattan businesses and property managers rely on Denair HVAC for dependable Carrier RTU repairs.
"Great company, our office was getting hotter by the minute. Denair had a tech on site with in the hour and the ac working perfect in two hours"
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"They have the best Engineering Service I have ever seen; they are always available on request and perform the maintenance in the most efficient way. Great Service."
"I recently used Denair for some repairs to my small two-story office building, and I have to say they are the most honest, hard-working and value focused HVAC provider I have ever experienced! Not only was the price competitive, but more importantly they helped reduce my energy costs from an..."
"Crew was respectful, fast, and left our place spotless. Five stars."
"I didn't even know about their referral program sending DENAIR to one of my commercial tenants. It was a nice surprise to get paid for referral. Based on the tenant's feedback, the job was well-done. Now it's no brainer to recommend DENAIR to all my tenants"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"Dennis was always available when I called on him. Never was any additional work generated on any quote/contract awarded. Reliable, expert and a pleasure to work with. A real value!"
"Denair is the most dependable HVAC service company in New York!"
"Impeccable install. You can tell they're pros the moment they walk in."
"What a great service. I randomly called to get multiple system inspected in my building. They came on time, done a great job and provided a detailed report. I love their transparency."
"excellent work and quality"
"Great reliable HVAC company, a very rare thing to say these days — the pricing is very competitive and the work is reliable. The staff is professional and courteous, they clean up after themselves and always answer. I would recommend them!"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"Great company, our office was getting hotter by the minute. Denair had a tech on site with in the hour and the ac working perfect in two hours"
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"They have the best Engineering Service I have ever seen; they are always available on request and perform the maintenance in the most efficient way. Great Service."
"I recently used Denair for some repairs to my small two-story office building, and I have to say they are the most honest, hard-working and value focused HVAC provider I have ever experienced! Not only was the price competitive, but more importantly they helped reduce my energy costs from an..."
"Crew was respectful, fast, and left our place spotless. Five stars."
"I didn't even know about their referral program sending DENAIR to one of my commercial tenants. It was a nice surprise to get paid for referral. Based on the tenant's feedback, the job was well-done. Now it's no brainer to recommend DENAIR to all my tenants"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"Dennis was always available when I called on him. Never was any additional work generated on any quote/contract awarded. Reliable, expert and a pleasure to work with. A real value!"
"Denair is the most dependable HVAC service company in New York!"
"Impeccable install. You can tell they're pros the moment they walk in."
"What a great service. I randomly called to get multiple system inspected in my building. They came on time, done a great job and provided a detailed report. I love their transparency."
"excellent work and quality"
"Great reliable HVAC company, a very rare thing to say these days — the pricing is very competitive and the work is reliable. The staff is professional and courteous, they clean up after themselves and always answer. I would recommend them!"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"Great company, our office was getting hotter by the minute. Denair had a tech on site with in the hour and the ac working perfect in two hours"
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"They have the best Engineering Service I have ever seen; they are always available on request and perform the maintenance in the most efficient way. Great Service."
"I recently used Denair for some repairs to my small two-story office building, and I have to say they are the most honest, hard-working and value focused HVAC provider I have ever experienced! Not only was the price competitive, but more importantly they helped reduce my energy costs from an..."
"Crew was respectful, fast, and left our place spotless. Five stars."
"I didn't even know about their referral program sending DENAIR to one of my commercial tenants. It was a nice surprise to get paid for referral. Based on the tenant's feedback, the job was well-done. Now it's no brainer to recommend DENAIR to all my tenants"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"Dennis was always available when I called on him. Never was any additional work generated on any quote/contract awarded. Reliable, expert and a pleasure to work with. A real value!"
"Denair is the most dependable HVAC service company in New York!"
"Impeccable install. You can tell they're pros the moment they walk in."
"What a great service. I randomly called to get multiple system inspected in my building. They came on time, done a great job and provided a detailed report. I love their transparency."
"excellent work and quality"
"Great reliable HVAC company, a very rare thing to say these days — the pricing is very competitive and the work is reliable. The staff is professional and courteous, they clean up after themselves and always answer. I would recommend them!"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
Manhattan building owners and property managers trust Denair HVAC for Carrier RTU repairs because we combine manufacturer-level expertise with the speed, transparency, and local knowledge New York demands.
Trained and certified by Carrier and other major manufacturers, ensuring repairs meet factory standards for your specific RTU model.
We typically arrive within 4 hours across Manhattan—minimizing tenant complaints and commercial downtime when your RTU fails.
Transparent, fixed proposal pricing with no hidden fees—all unintended costs are absorbed by us, protecting your facility budget.
OSHA-certified and scaffolding-certified technicians fully versed in NYC building codes and Local Law 97 compliance requirements for Manhattan properties.
Experienced professionals dedicated to keeping Manhattan's rooftop units running.
Founder & CEO
Dennis founded Denair HVAC in March 2007 with a single used truck and a vision to deliver honest, high-quality HVAC service to New York. With over 17 years of hands-on industry experience, he built the company from the ground up—growing it to $2M+ in annual revenue within 5 years and earning recognition from Inc. 5000 as one of America's fastest-growing companies. Dennis leads the company's strategic vision and holds deep expertise in all aspects of commercial HVAC, including Carrier rooftop unit systems serving Manhattan's demanding commercial and mixed-use buildings.
Service Manager
Thomas leads Denair HVAC's service operations with a relentless focus on fast response times and consistent service quality. He coordinates technician dispatch across Manhattan and the broader NYC metro area, ensuring Carrier RTU repair calls are handled efficiently and professionally. Thomas manages scheduling, customer communication, and technician performance to minimize equipment downtime and deliver a seamless service experience—from the first call to final system testing. His operational leadership is a key reason Denair consistently achieves same-day response targets across Manhattan's high-rise and commercial rooftops.
Application Engineer
Ramil designs and supports HVAC system solutions tailored to each building's unique performance and efficiency requirements—expertise that directly informs how Carrier rooftop units are repaired, upgraded, and optimized at Denair. He oversees equipment selection, technical planning, and application engineering to ensure repairs deliver long-lasting reliability, measurable energy savings, and full compliance with NYC building codes. For Manhattan property managers navigating Local Law 97 requirements, Ramil's technical guidance ensures Carrier RTU repair and upgrade decisions are both code-compliant and cost-effective.
Lead Estimator
Farrukh has been a cornerstone of Denair HVAC since 2010, bringing deep estimating expertise to every Carrier RTU repair and HVAC project. He is responsible for preparing accurate, comprehensive bid proposals in a timely manner—tracking opportunities with vendors, subcontractors, and clients to ensure competitive, transparent pricing. For Manhattan building owners and property managers evaluating RTU repair costs, Farrukh's detailed scope breakdowns, alternates, and revisions provide the clarity needed to make confident decisions. His work has contributed directly to Denair's $76M+ in total project bids.
A well-maintained rooftop package unit typically lasts 15 to 20 years. In Manhattan's urban environment—where rooftop units face salt air, temperature extremes, and heavy year-round use—lifespan can be closer to 12 to 15 years without regular maintenance. Annual preventive maintenance, prompt repairs, and timely filter changes are the most effective ways to maximize your RTU's operational life.
Speak directly with a manufacturer-trained technician for expert advice and a free estimate.
Denair HVAC provides Carrier rooftop unit repair services across Manhattan and all major New York Metro boroughs and counties.
11 Regions Served
Service Area
24/7 Response
Emergency Availability
Within 4 Hours
Typical Response Time
Contact us to confirm coverage and schedule your Carrier RTU repair today.
Recognized as one of America's fastest-growing companies.
Full OSHA 40-hour safety certification for all field technicians.
Licensed and registered HVAC/mechanical contractor in New York.
Fill out the form below and a Denair HVAC specialist will respond promptly—typically within the same business day—to discuss your Carrier rooftop unit issue, provide transparent pricing, and schedule service at your convenience.
For immediate assistance, feel free to give us a direct call at 718-791-5074 You can also send us a quick email at
For immediate assistance, feel free to give us a direct call at 718-791-5074 You can also send us a quick email at