Queens' diverse multifamily housing stock—from pre-war co-ops in Forest Hills to newer high-rises in Long Island City—demands HVAC expertise built for scale and compliance. Denair HVAC delivers turnkey installation, preventive maintenance, emergency repairs, and LL97-compliant upgrades for multifamily properties across Queens, with 28 certified technicians ready to keep every unit comfortable year-round.
Comprehensive HVAC solutions for multifamily residential buildings in Queens—from installation and upgrades to compliance and 24/7 emergency support.
Turnkey HVAC installation for multifamily buildings with end-to-end project management. Covers equipment, ductwork, piping, controls, and commissioning—handling projects from $10,000 to $5,000,000 with value engineering savings up to 35%.
Proactive, customized maintenance plans that extend system lifespan, reduce energy costs, and prevent unexpected breakdowns across all units. Free preventive maintenance included for up to 18 months on all new installations.
Around-the-clock emergency HVAC repair by certified technicians, typically responding within 4 hours. Equipped to service all major brands from ½ to 100 tons of cooling capacity—minimizing tenant disruption.
Modernize aging multifamily HVAC equipment with targeted retrofits and expert tuning. Optimize performance, improve tenant comfort, and meet current NYC energy standards without requiring full system replacement.
Navigate NYC's Local Law 97 carbon emissions mandates with confidence. Denair guides multifamily property owners through compliance requirements, equipment upgrades, and sustainability strategies to avoid penalties.
Variable Refrigerant Flow and split system installations ideal for multifamily buildings with rooftop or balcony access. Delivers zoned comfort control and energy efficiency across individual units and common areas.
Managing HVAC for a Queens multifamily property means balancing tenant comfort, NYC building codes, LL97 compliance deadlines, and tight capital budgets—all at once. Denair HVAC specializes in exactly this. With over 19 years serving NYC's five boroughs, 28 certified technicians, and a value engineering process that has saved clients over $186,000 in the last six months alone, we deliver reliable, affordable, code-compliant HVAC solutions sized for buildings of any scale.
See how Queens and NYC multifamily property owners have saved money and improved comfort with Denair HVAC.
"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."
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"Impeccable install. You can tell they're pros the moment they walk in."
"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"
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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."
"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."
"Denair is professional and courteous."
"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."
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"Impeccable install. You can tell they're pros the moment they walk in."
"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"
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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."
"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."
"Denair is professional and courteous."
"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."
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"Impeccable install. You can tell they're pros the moment they walk in."
"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"
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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."
"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."
"Denair is professional and courteous."
Here's what sets Denair HVAC apart as Queens' preferred multifamily HVAC contractor.
Save up to 35% on your Queens multifamily HVAC budget through our proven value engineering process—without compromising system quality.
28 OSHA-certified technicians, each with a minimum of 5 years of HVAC experience, trained and certified by major manufacturers.
Deep expertise in NYC's Local Law 97 and building codes ensures your Queens multifamily property stays compliant and penalty-free.
24/7 emergency repairs with typical response within 4 hours—keeping your Queens tenants comfortable in any season, any situation.
Experienced HVAC professionals dedicated to Queens multifamily properties.
Founder & CEO
Dennis founded Denair HVAC in Brooklyn in March 2007—starting with just one man and a beat-up used truck. With over 17 years of hands-on HVAC experience across all aspects of the business, Dennis grew the company to $2 million in revenue within its first five years and earned recognition on the Inc. 5000 list of America's fastest-growing companies. His strategic vision has made Denair one of the most trusted multifamily and commercial HVAC contractors serving Queens, Brooklyn, and the greater NYC metro area—built on honesty, commitment, and a relentless focus on client value.
Service Manager
Thomas leads Denair HVAC's service operations across Queens and the five boroughs, ensuring fast response times, efficient scheduling, and consistent service quality on every job. He coordinates technician dispatch and customer communication to minimize system downtime—critical for multifamily buildings where dozens of tenants depend on reliable climate control. From routine maintenance calls to 24/7 emergency responses, Thomas ensures every service interaction runs smoothly from first call to final sign-off, maintaining the standards that Denair's multifamily clients have come to expect.
Application Engineer
Ramil designs and engineers HVAC systems tailored to the unique structural and energy performance demands of multifamily buildings throughout Queens and NYC. He oversees equipment selection, technical planning, and application support—ensuring every system is code-compliant, energy-efficient, and built for long-term reliability. With deep knowledge of LL97 requirements and the latest HVAC technologies, Ramil helps property managers and owners select solutions that reduce operating costs, extend equipment lifespan, and meet the comfort expectations of today's residential tenants.
Lead Estimator
Farrukh has been a cornerstone of Denair HVAC since 2010, bringing unmatched precision and speed to every bid proposal for multifamily and commercial HVAC projects across Queens and the NYC metro area. As Lead Estimator, he is responsible for comprehensive bid preparation, tracking opportunities with vendors and subcontractors, and delivering detailed scope breakdowns with alternates and revisions. His expertise in value engineering helps multifamily property owners and managers understand exactly where their HVAC budget is going—and where significant savings are possible.
Denair HVAC offers a full range of multifamily HVAC services in Queens, including new system installation, preventive maintenance plans, 24/7 emergency repairs, system upgrades, VRF and split system installation, LL97 compliance consulting, energy management solutions, and complete project management. We handle projects from $10,000 to $5,000,000 and serve buildings of all sizes throughout Queens and the NYC metro area.
Speak directly with a Denair HVAC expert for a free, no-obligation consultation tailored to your multifamily property.
Denair HVAC serves multifamily properties across Queens and all five NYC boroughs, plus surrounding metro counties.
11 Regions
Service Area
24/7 Service
Emergency Availability
400+ Projects
Projects Completed
Contact us to confirm service availability for your multifamily property address.
Recognized as one of America's fastest-growing companies.
All technicians hold OSHA 40-hour safety certification.
Licensed Mechanical/HVAC Contractor registered in New York State.
Fill out the form below and a Denair HVAC specialist will reach out within one business day to discuss your multifamily building's HVAC needs, provide a detailed scope breakdown, and deliver a competitive, value-engineered proposal.
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