HVAC Installation
Turnkey commercial HVAC installation with full project management, in-shop ductwork fabrication, and value engineering that saves clients up to 35% on budget. Handles jobs from $10,000 to $5,000,000.
Queens property owners and managers trust Denair HVAC for full-service mechanical contracting — from turnkey HVAC installation and 24/7 emergency repairs to energy-saving upgrades that tackle the borough's demanding year-round climate. With 19+ years of NYC experience, a 28-person certified team, and projects ranging from $10K to $5M, we deliver on time and within budget.
End-to-end commercial and residential HVAC solutions for Queens properties, from new installations to round-the-clock emergency repairs.
Turnkey commercial HVAC installation with full project management, in-shop ductwork fabrication, and value engineering that saves clients up to 35% on budget. Handles jobs from $10,000 to $5,000,000.
Licensed technicians service, maintain, and repair all residential and commercial air conditioning and heating equipment across Queens — free estimates available for every call.
Certified technicians on call around the clock, arriving fully equipped to handle urgent HVAC failures on all major brands — typically within 4 hours to minimize operational downtime.
Modernize aging equipment with targeted retrofits and expert tune-ups that improve performance, enhance comfort, and bring systems into compliance with current NYC energy standards.
Customized maintenance plans that extend system lifespan, reduce energy costs, and prevent surprise breakdowns — including up to 18 months of free preventive maintenance on all new installations.
Smart building controls and automation solutions designed to significantly cut energy costs and environmental impact, while keeping Queens facilities compliant with NYC's LL97 sustainability mandates.
A dedicated estimator visits your Queens property to evaluate existing systems, assess structural constraints, and fully scope the project — identifying cost-saving opportunities before a single proposal is written.
See how Queens businesses and property managers achieved lasting comfort and savings with Denair HVAC.
"Being an accountant for many years, I happened to have a few General Contractors working in NYC, I introduced Denair to some of them and got substantial commissions on several contracts they closed on! It's always to make extra cash"
"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."
"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!"
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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."
"Denair is the most dependable HVAC service company in New York!"
"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 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!"
"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."
"Denair is professional and courteous."
"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"
"Being an accountant for many years, I happened to have a few General Contractors working in NYC, I introduced Denair to some of them and got substantial commissions on several contracts they closed on! It's always to make extra cash"
"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."
"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!"
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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."
"Denair is the most dependable HVAC service company in New York!"
"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 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!"
"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."
"Denair is professional and courteous."
"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"
"Being an accountant for many years, I happened to have a few General Contractors working in NYC, I introduced Denair to some of them and got substantial commissions on several contracts they closed on! It's always to make extra cash"
"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."
"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!"
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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."
"Denair is the most dependable HVAC service company in New York!"
"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 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!"
"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."
"Denair is professional and courteous."
"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"
Queens contractors and property managers choose Denair for one reason: we deliver more value, more reliably, than anyone else in NYC.
All unintended costs are covered at our expense — your Queens project budget never gets blindsided.
Same-day emergency service, usually within 4 hours, keeps Queens facilities running with zero prolonged downtime.
OSHA-certified, manufacturer-trained technicians with a minimum of 5 years of experience handle every Queens job.
Named one of America's fastest-growing companies — a track record Queens property owners can rely on.
The experienced professionals delivering HVAC excellence across Queens and all of NYC.
Founder & CEO
Dennis founded Denair HVAC in March 2007 with a single used truck and a determination to bring honest, affordable mechanical contracting to New York City. Drawing on 7 years of prior HVAC industry experience, he built the company from a one-man operation to a $2M+ revenue enterprise recognized by the Inc. 5000 as one of America's fastest-growing companies. Today, Dennis leads Denair's strategic vision — overseeing every aspect of the business from value engineering on multi-million-dollar Queens commercial projects to ensuring that residential clients across the borough receive the same level of care and transparency that has defined the company since day one.
Service Manager
Thomas leads Denair HVAC's service operations across Queens and the broader NYC metro area, ensuring that every technician dispatch — whether a routine maintenance visit or an urgent 4-hour emergency call — runs with precision and care. He coordinates field technicians, manages scheduling, and maintains direct communication with clients to minimize downtime and maximize satisfaction. Thomas is the backbone of Denair's industry-leading service responsiveness, overseeing a team that handles everything from rooftop RTU repairs in Long Island City to residential HVAC service calls in Flushing and Jamaica. His focus on consistent quality and fast turnaround is a core reason clients continue to trust Denair year after year.
Lead Estimator
Farrukh has been a cornerstone of Denair HVAC since 2010, bringing sharp analytical skill and deep market knowledge to every bid the company submits. As Lead Estimator, he is responsible for preparing comprehensive, timely bid proposals — providing detailed scope breakdowns, alternates, and revisions that reflect the specific demands of Queens commercial and residential projects. Farrukh's value engineering expertise is a key driver of Denair's ability to consistently offer pricing 10–35% below competitors without sacrificing quality or compliance. He tracks opportunities across vendors, subcontractors, and clients, ensuring that every Queens proposal is both competitive and financially sound for all parties involved.
Application Engineer
Ramil designs and engineers HVAC systems tailored to the unique performance and efficiency requirements of each building Denair serves in Queens and across NYC. He oversees equipment selection, technical planning, and application support — ensuring every system is code-compliant, energy-efficient, and built for long-term reliability. Queens' diverse building stock, from aging co-ops in Forest Hills to newer mixed-use developments in Astoria, presents varied technical challenges that Ramil navigates with precision. His engineering oversight is integral to Denair's quality guarantee: if service quality does not meet code requirements, clients receive their money back.
A Building Automation System (BAS) for a commercial property in Queens typically ranges from $2.50 to $7.00 per square foot, depending on building size, system complexity, and the number of integrated subsystems. A basic retrofit for a mid-size commercial building may cost $15,000–$50,000, while a full new-construction BAS installation can exceed $200,000. Denair provides fixed-price proposals with detailed scope breakdowns so there are no budget surprises.
Talk to a Denair expert today for a free consultation and fixed-price estimate.
Denair HVAC serves commercial and residential clients across Queens and the entire New York metro area, delivering expert HVAC contracting wherever you need it.
11 Regions
Service Area
24/7 Service
Emergency Availability
400+ Jobs
Projects Completed
Contact us to confirm coverage and schedule your free on-site assessment today.
Recognized as one of America's fastest-growing companies.
Full OSHA safety compliance on every job site.
Licensed HVAC contractor operating across NYC and New York State.
Fill out the form below and a Denair HVAC expert will reach out within one business day with a detailed, fixed-price assessment tailored to your Queens property.
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