24/7 Emergency Repairs
Certified technicians on call around the clock, arriving fully equipped to handle urgent repairs on all major HVAC brands. Same-day service typically within 4 hours, handling equipment from 1/2 to 100 tons of cooling capacity.
When your commercial HVAC system fails in Queens, every minute of downtime costs money. Denair HVAC's certified technicians respond within 4 hours, around the clock, to diagnose and restore your system fast. From office buildings and retail stores to medical facilities across Queens, we keep your operations running—no matter the season, no matter the hour.
Comprehensive emergency HVAC solutions for Queens businesses, available 24 hours a day, 7 days a week.
Certified technicians on call around the clock, arriving fully equipped to handle urgent repairs on all major HVAC brands. Same-day service typically within 4 hours, handling equipment from 1/2 to 100 tons of cooling capacity.
Licensed technicians trained to service, maintain, and repair all commercial air conditioning and heating equipment. Covers AC repairs and replacements, furnace fixes, filter changes, and duct cleaning to restore full system performance.
Proactive maintenance plans that reduce the risk of emergency breakdowns, extend system lifespan, and lower energy costs year-round. Customized plans available with free preventative maintenance for up to 18 months on new installations.
Targeted retrofits and expert system tune-ups to modernize aging commercial equipment, optimize performance, and meet current energy standards—reducing emergency repair frequency without requiring full system replacement.
Smart controls and automation solutions that monitor system health in real time, reducing the likelihood of unexpected failures and significantly cutting energy costs for Queens commercial properties.
Expert guidance helping Queens and NYC businesses navigate Local Law 97 sustainability mandates, ensuring your commercial HVAC systems remain compliant and avoid costly penalties.
Call our Queens emergency line any time—day or night, weekends included. A live dispatcher answers immediately, gathers details about your commercial HVAC issue, and begins mobilizing the nearest available certified technician without delay.
See how Denair HVAC has restored comfort and continuity for commercial clients across Queens and NYC.
"Denair is the most dependable HVAC service company in New York!"
"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 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..."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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"
"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!"
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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 professional and courteous."
"excellent work and quality"
"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"
"Denair is the most dependable HVAC service company in New York!"
"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 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..."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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"
"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!"
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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 professional and courteous."
"excellent work and quality"
"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"
"Denair is the most dependable HVAC service company in New York!"
"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 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..."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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"
"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!"
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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 professional and courteous."
"excellent work and quality"
"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"
Queens businesses depend on us because we combine speed, expertise, and transparent pricing that competitors simply can't match.
We arrive at your Queens commercial property within 4 hours—any time, any day, including nights and weekends.
Our technicians are trained and certified directly by major HVAC manufacturers, eliminating the wait for brand-specific repair representatives.
Fixed proposal pricing with no hidden fees—all unintended costs are covered at our expense, giving Queens facility managers total budget confidence.
Founded in Brooklyn in 2007 and serving Queens and all NYC boroughs for nearly two decades, Denair understands the unique demands of New York commercial buildings.
Experienced professionals dedicated to keeping your commercial systems running.
Founder & CEO
Dennis founded Denair HVAC in March 2007 with nothing more than one man and a beat-up used truck. Armed with 7 years of hands-on industry experience before striking out on his own, he built the company from the ground up into a $2M+ revenue operation recognized by Inc. 5000 as one of America's fastest-growing companies. With over 17 years leading Denair, Dennis has shaped the company's strategic vision around honesty, affordability, and rapid response—values that are especially critical for Queens and NYC commercial clients facing HVAC emergencies. His leadership has driven over 400 successfully completed projects and $76M in project bids across the New York Metro Area.
Service Manager
Thomas leads Denair HVAC's service operations across Queens and all NYC boroughs, ensuring fast response times, efficient technician scheduling, and consistent service quality for every emergency call. He is the operational backbone behind Denair's industry-leading 4-hour emergency response commitment—coordinating field technicians, managing customer communications, and overseeing dispatch logistics so that when a Queens commercial property faces an HVAC failure at 2 AM, the right technician with the right parts is en route within the hour. Thomas's focus on reducing downtime and delivering a smooth service experience from first call to final system test is central to Denair's reputation for reliability.
Application Engineer
Ramil designs and supports HVAC systems tailored to each commercial building's unique performance and efficiency requirements. For Queens commercial properties—ranging from dense mixed-use buildings to large retail spaces—he oversees equipment selection, technical planning, and application support to ensure long-lasting reliability, meaningful energy savings, and full compliance with NYC building codes including Local Law 97. When emergency repairs reveal deeper systemic issues, Ramil steps in to develop engineered solutions that prevent recurring failures. His expertise bridges the gap between emergency repair and long-term system optimization, giving Queens facility managers a clear path from crisis to confidence.
Lead Estimator
Farrukh has been a cornerstone of Denair HVAC since 2010, bringing precision and speed to every bid proposal for commercial HVAC projects across Queens and the broader New York Metro Area. As Lead Estimator, he is responsible for preparing comprehensive, timely bid proposals and tracking opportunities with vendors, subcontractors, and customers. His expertise in value engineering allows him to identify cost-saving opportunities that have collectively saved Denair's clients over $186,000 on commercial HVAC installations in recent months alone. For Queens commercial clients concerned about emergency repair costs, Farrukh ensures transparent, competitive pricing from the first estimate.
Emergency HVAC repair costs in Queens typically range from $150 to $500+ for after-hours diagnostic and labor fees, with parts costs added depending on the repair. At Denair HVAC, we provide transparent pricing before any work begins—there are no hidden charges, and all unintended costs are covered at our expense. Contact us for an upfront estimate specific to your situation.
Speak directly with a Denair HVAC expert for immediate answers and a free assessment.
Denair HVAC provides 24/7 emergency commercial HVAC repairs across Queens and the entire New York Metro Area.
11 Regions Served
Service Area
Within 4 Hours
Emergency Response
4.7★ on Google
Customer Rating
Contact us to confirm coverage and get an emergency technician dispatched to your property today.
Recognized as one of America's fastest-growing companies.
Full OSHA safety compliance for all commercial job sites.
Fully licensed HVAC contractor registered in New York State.
Fill out the form below and a Denair HVAC specialist will respond immediately. For the fastest response to a live emergency, call us directly—our team is available 24/7, including nights and weekends.
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