RTU Replacement
Full replacement of aging or failed commercial rooftop units with modern, energy-efficient equipment. We handle crane logistics, structural coordination, and full commissioning to minimize downtime for your business.
Long Island City's commercial buildings demand reliable climate control year-round. Denair HVAC delivers expert rooftop unit replacement and installation with certified technicians, value-engineered pricing that saves clients up to 35%, and free preventative maintenance for up to 18 months on every new installation. Discover why property managers and business owners across Queens trust us.
Comprehensive rooftop unit solutions for commercial properties across Long Island City and the greater NYC area.
Full replacement of aging or failed commercial rooftop units with modern, energy-efficient equipment. We handle crane logistics, structural coordination, and full commissioning to minimize downtime for your business.
Turnkey new rooftop unit installations with end-to-end project management, including ductwork, controls, and BMS integration—delivered on schedule with fixed proposal pricing and no surprise costs.
Retrofit and modernize outdated commercial RTU systems to meet current energy standards and NYC LL97 compliance requirements, boosting performance and reducing operating costs without full system replacement.
Proactive RTU maintenance plans that extend equipment lifespan, reduce energy costs, and prevent surprise breakdowns. Free maintenance included for up to 18 months on all new RTU installations.
Certified technicians available around the clock for urgent RTU repairs, typically on-site within 4 hours. Trained and certified by major manufacturers to service all leading commercial RTU brands.
Smart controls and automation solutions integrated with your RTU system to significantly reduce energy consumption and streamline building operations across your Long Island City commercial property.
Our application engineers conduct a thorough on-site evaluation of your Long Island City facility, reviewing structural load capacity, existing ductwork, electrical infrastructure, and access constraints to determine the optimal RTU solution for your building.
See how Long Island City and NYC businesses have saved thousands with Denair HVAC's RTU solutions.
"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"
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"Impeccable install. You can tell they're pros the moment they walk in."
"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."
"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!"
"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"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"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..."
"excellent work and quality"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"Crew was respectful, fast, and left our place spotless. Five stars."
"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."
"I know DENAIR for years dealing with their commercial insurance matters. I know they provide best in class services and have recommended them to a couple of major construction industry players. I can definitely say – the bigger the project the bigger my commission is"
"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!"
"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"
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"Impeccable install. You can tell they're pros the moment they walk in."
"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."
"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!"
"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"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"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..."
"excellent work and quality"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"Crew was respectful, fast, and left our place spotless. Five stars."
"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."
"I know DENAIR for years dealing with their commercial insurance matters. I know they provide best in class services and have recommended them to a couple of major construction industry players. I can definitely say – the bigger the project the bigger my commission is"
"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!"
"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"
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"Impeccable install. You can tell they're pros the moment they walk in."
"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."
"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!"
"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"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"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..."
"excellent work and quality"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"Crew was respectful, fast, and left our place spotless. Five stars."
"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."
"I know DENAIR for years dealing with their commercial insurance matters. I know they provide best in class services and have recommended them to a couple of major construction industry players. I can definitely say – the bigger the project the bigger my commission is"
"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!"
Long Island City commercial property owners choose Denair HVAC for our proven track record, certified expertise, and unmatched value.
We save Long Island City clients up to 35% on RTU projects through approved alternative equipment and optimized scope planning.
28 certified technicians with OSHA training and manufacturer certifications handle every RTU project to the highest NYC code standards.
All unintended costs are covered at our own expense—no surprise charges on your Long Island City RTU replacement or installation project.
Up to 10-year manufacturer warranties and 18 months of free preventative maintenance on all new RTU installations, protecting your investment.
Experienced professionals dedicated to delivering exceptional commercial HVAC results.
Founder & CEO
Dennis founded Denair HVAC in March 2007 with a single used truck and over 7 years of field experience. With more than 17 years leading the company, he has grown Denair from a one-man operation into a $2M+ revenue commercial HVAC contractor recognized by Inc. 5000 as one of America's fastest-growing companies. Dennis personally oversees the company's strategic direction, ensuring every RTU replacement and installation in Long Island City and across the NYC metro area meets the exacting standards of quality and value that Denair has become known for. His expertise spans all aspects of commercial HVAC, from value engineering to large capital improvement projects.
Service Manager
Thomas leads Denair HVAC's service operations across the NYC metro area, including Long Island City, ensuring fast response times, efficient technician scheduling, and consistent quality on every commercial RTU service call. His operational focus means that when a rooftop unit fails at a Queens commercial property, Thomas's team is coordinated and on-site rapidly—typically within 4 hours for emergency situations. He oversees all customer communications and service workflows to reduce downtime and deliver a seamless experience from the first call through project completion and ongoing maintenance.
Application Engineer
Ramil designs and engineers HVAC systems tailored to the unique performance and efficiency needs of each commercial building in Long Island City and the broader NYC market. For commercial RTU projects, he oversees equipment selection, load calculations, structural coordination, and technical planning to ensure the right rooftop unit is specified for each property. His engineering expertise ensures code-compliant solutions that deliver long-term energy savings and reliable performance, whether it is a straightforward RTU swap on a retail building or a complex multi-unit installation on a mixed-use development.
Lead Estimator
Farrukh joined Denair HVAC in 2010 and has been instrumental in winning and delivering competitive RTU replacement and installation bids across Long Island City and New York City. As Lead Estimator, he prepares comprehensive, accurate bid proposals for commercial HVAC projects of all sizes—from $10,000 retrofits to $5,000,000 capital improvement programs. Farrukh's deep vendor and subcontractor network enables value engineering that routinely saves clients 25–35% compared to competing proposals, while his meticulous scope breakdowns ensure there are no surprises at project completion.
Commercial RTU replacement in Long Island City typically ranges from $8,000 to $40,000+ depending on unit tonnage, brand, access complexity, and ductwork modifications needed. Denair HVAC's value engineering approach routinely saves clients 25–35% compared to standard contractor pricing. We provide a fixed-price proposal so you know the exact cost before work begins—with no hidden charges or cost overruns billed to you.
Speak with a certified Denair HVAC specialist for a free, no-obligation consultation and estimate.
Denair HVAC serves commercial properties across Long Island City and the entire New York metropolitan area.
11 Regions
Service Area
400+
Projects Completed
Within 4 Hours
Emergency Response
Contact us to confirm coverage for your property and get a free RTU replacement estimate.
Recognized as one of America's fastest-growing companies.
All technicians hold OSHA 40-hour safety certification.
Licensed and registered HVAC/mechanical contractor in New York.
Fill out the form below and a Denair HVAC specialist will contact you promptly to discuss your Long Island City RTU replacement or installation project, provide a detailed scope breakdown, and deliver a fixed-price proposal with no obligation.
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