24/7 Emergency Repairs
Certified technicians on call around the clock to diagnose and restore critical HVAC systems—usually within 4 hours. Trained on all major brands, from 1/2 to 100 tons of cooling capacity, minimizing operational disruption.
Queens facilities operate under zero tolerance for HVAC failure—whether it's a data center in Long Island City, a medical office in Flushing, or a high-rise in Jamaica. Denair HVAC delivers mission-critical climate control with 24/7 emergency response, certified technicians, value-engineered installations, and guaranteed uptime for Queens' most demanding commercial and industrial environments.
Comprehensive HVAC solutions engineered for maximum uptime, compliance, and performance across Queens' most demanding facilities.
Certified technicians on call around the clock to diagnose and restore critical HVAC systems—usually within 4 hours. Trained on all major brands, from 1/2 to 100 tons of cooling capacity, minimizing operational disruption.
Turnkey commercial HVAC installation with end-to-end project management. Value engineering saves clients up to 35% on equipment and installation budgets, covering projects from $10,000 to $5,000,000 across Queens facilities.
Proactive maintenance plans that extend system lifespan, reduce energy costs, and prevent unexpected breakdowns. Free preventive maintenance for up to 18 months included with all new installations.
Modernize outdated equipment with targeted retrofits and expert system tuning. Optimizes performance and energy efficiency without full system replacement—delivering specialized programs that prioritize uptime and redundancy.
Smart HVAC controls and automation solutions that significantly reduce energy costs and environmental impact. Helps Queens facilities meet NYC's LL97 sustainability mandates while maximizing operational efficiency.
In-house HVAC system design, shop drawings, value engineering, and full project management from start to finish—including BMS integration, commissioning, and fast paperwork turnaround for Queens commercial projects.
Queens is home to hospitals, financial institutions, retail flagships, and dense residential towers—all of which demand HVAC systems that never fail. Denair HVAC specializes in mission-critical environments where uptime is non-negotiable. With 28 certified technicians, same-day emergency response, value-engineered installations, and up to 10-year warranties, we ensure your facility's climate control remains compliant, efficient, and fully operational year-round—regardless of NYC's extreme seasonal demands.
See how Denair HVAC has delivered reliable, cost-saving HVAC solutions to facilities across Queens and the NYC metro.
"Denair is the most dependable HVAC service company in New York!"
"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 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 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"
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"Crew was respectful, fast, and left our place spotless. Five stars."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"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."
"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"
"Denair is the most dependable HVAC service company in New York!"
"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 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 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"
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"Crew was respectful, fast, and left our place spotless. Five stars."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"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."
"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"
"Denair is the most dependable HVAC service company in New York!"
"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 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 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"
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"Crew was respectful, fast, and left our place spotless. Five stars."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"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."
"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"
Denair HVAC has been the trusted mission-critical HVAC partner for Queens facilities for over 19 years—here's what sets us apart.
24/7 emergency service with technicians on-site across Queens typically within 4 hours of your call.
Save up to 35% on HVAC budgets through proven value engineering—Queens clients saved over $186,000 in six months.
28 OSHA-certified technicians, each with a minimum of 5 years' experience, trained and certified by major manufacturers.
Fixed proposal pricing means all unintended costs are absorbed at our expense—no surprise bills for Queens facility managers.
Experienced professionals dedicated to mission-critical HVAC excellence across Queens and NYC.
Founder & CEO
Dennis founded Denair HVAC in March 2007 with one man and a beat-up used truck—right after being laid off from a 7-year HVAC career. Through relentless commitment to honesty and quality, he scaled the company to over $2 million in annual revenue within five years. Today, Dennis leads Denair's strategic vision across Queens and the wider NYC metro, overseeing a team of 28 certified technicians and securing recognition from the Inc. 5000 as one of America's fastest-growing companies. His hands-on expertise in every facet of commercial and mission-critical HVAC underpins the company's reputation for delivering on time and within budget.
Service Manager
Thomas leads Denair HVAC's service operations across Queens and the NYC metro, ensuring fast response times, efficient technician scheduling, and consistent service quality on every call. His role is pivotal to Denair's mission-critical promise: coordinating certified technicians and customer communications so that systems are restored quickly, downtime is minimized, and clients experience a seamless service from first call to final sign-off. Thomas's operational discipline is a key reason Denair consistently achieves same-day service—usually within four hours—for emergency HVAC situations in Queens facilities ranging from medical offices to commercial towers.
Application Engineer
Ramil designs and supports HVAC systems tailored to the unique performance and efficiency demands of each Queens building. He oversees equipment selection, technical planning, and application engineering to ensure every installation delivers long-lasting reliability, measurable energy savings, and full compliance with NYC building codes—including LL97 sustainability requirements. Ramil's expertise is especially critical for mission-critical environments where precise system sizing and redundancy planning are essential. His work ensures that Denair's Queens clients receive not just an installation, but an engineered solution built to protect operations for years to come.
Lead Estimator
Farrukh has been with Denair HVAC since 2010, bringing deep expertise in bid proposal preparation for commercial and mission-critical HVAC projects across Queens and the NYC metro. As Lead Estimator, he is responsible for delivering accurate, comprehensive proposals in a timely manner—tracking opportunities with vendors, subcontractors, and clients, and providing scope breakdowns with alternates and revisions. Farrukh's value engineering approach helps Queens facility managers and property owners identify key cost-saving opportunities without sacrificing performance, contributing to the $186,000+ in client savings achieved in recent months.
A mission-critical HVAC contractor specializes in environments where climate control failure is not an option—hospitals, data centers, financial institutions, and dense commercial buildings. In Queens, where facilities like those in Flushing Medical Center or Long Island City tech hubs operate 24/7, a mission-critical contractor provides redundancy planning, rapid emergency response, and compliance-focused maintenance to guarantee zero unplanned downtime.
Speak directly with a certified Denair HVAC expert—free consultation available for Queens facilities.
Denair HVAC provides mission-critical HVAC services across Queens and all surrounding New York City boroughs and counties.
11+ Regions
Service Area
24/7 Response
Emergency Availability
4.7★ Rated
Google Rating
Contact us to confirm coverage and get a free estimate for your facility.
One of America's fastest-growing and most successful companies.
All technicians OSHA-certified for safe, compliant job site operations.
Fully licensed Mechanical/HVAC Contractor operating across New York.
Fill out the form below and a Denair HVAC specialist will reach out to discuss your Queens facility's needs, provide a detailed scope breakdown, and deliver a competitive, value-engineered proposal—typically within 24 hours.
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