Long Island City's booming residential towers and converted loft buildings demand HVAC systems built for high occupancy and year-round performance. Denair HVAC delivers turnkey multi-family HVAC installation, maintenance, and emergency repair—backed by 19+ years of New York expertise, value-engineered pricing, and a guarantee that no tenant is ever left in the heat or cold.
Comprehensive HVAC solutions tailored to the unique demands of multi-family residential properties in Long Island City and across NYC.
Turnkey multi-family HVAC installation 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 that saves clients up to 35%.
Proactive maintenance plans that keep multi-family systems running efficiently year-round, reduce unexpected breakdowns, lower utility costs, and extend equipment lifespan. Free preventive maintenance for up to 18 months on new installations.
Certified technicians on call around the clock to restore comfort in multi-family buildings fast—typically within 4 hours. Fully equipped for all major HVAC brands, handling units from 1/2 to 100 tons of cooling capacity.
Variable Refrigerant Flow and split systems are ideal for Long Island City's mixed-use residential towers with accessible rooftops or balconies, delivering precise zone-by-zone climate control and energy efficiency across every unit.
Smart controls and building automation solutions designed to significantly cut energy costs and environmental impact—critical for meeting NYC's evolving sustainability requirements in multi-family properties.
Expert guidance through NYC Local Law 97 sustainability mandates, helping multi-family property owners and managers avoid penalties while modernizing HVAC systems to meet strict emissions and efficiency benchmarks.
We conduct a thorough on-site evaluation of your Long Island City multi-family property, reviewing building layout, existing mechanical infrastructure, occupancy demands, and any NYC code or LL97 compliance requirements before a single proposal is drafted.
See how Denair HVAC has delivered reliable comfort and measurable savings for multi-family properties across NYC.
"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!"
"Denair is the most dependable HVAC service company in New York!"
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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"
"Crew was respectful, fast, and left our place spotless. Five stars."
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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!"
"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 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..."
"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"
"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 was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"excellent work and quality"
"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!"
"Denair is the most dependable HVAC service company in New York!"
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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"
"Crew was respectful, fast, and left our place spotless. Five stars."
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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!"
"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 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..."
"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"
"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 was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"excellent work and quality"
"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!"
"Denair is the most dependable HVAC service company in New York!"
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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"
"Crew was respectful, fast, and left our place spotless. Five stars."
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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!"
"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 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..."
"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"
"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 was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"excellent work and quality"
Long Island City property managers and developers trust Denair HVAC because we combine deep local expertise with guaranteed pricing, certified craftsmanship, and a relentless commitment to keeping every tenant comfortable.
We consistently deliver proposals up to 35% below competitors, having saved clients over $186,000 on NYC HVAC projects in just six months.
Over 19 years serving Long Island City and the broader NYC metro, with deep knowledge of local codes, LL97 mandates, and high-density building demands.
Certified technicians arrive typically within 4 hours, ensuring no resident in your multi-family property suffers extended heating or cooling failure.
All unintended costs are compensated at our own expense, and a 10-year extended warranty is available on every piece of installed equipment.
Experienced professionals dedicated to exceptional multi-family HVAC service across NYC.
Founder & CEO
Dennis founded Denair HVAC in March 2007 with a single used truck and the determination to build New York's most reliable mechanical contracting company. Drawing on over 17 years of hands-on HVAC industry experience, he has grown the business from a one-man operation to a $2M+ revenue enterprise recognized by Inc. 5000 as one of America's fastest-growing companies. Dennis leads the company's strategic vision with a focus on value engineering, transparent pricing, and delivering exceptional results for multi-family and commercial clients across Long Island City and the entire NYC metro area. His leadership culture—built on honesty, commitment, and client-first thinking—sets the foundation for everything Denair HVAC does.
Service Manager
Thomas leads Denair HVAC's service operations with a sharp focus on speed, reliability, and tenant satisfaction—qualities that are non-negotiable in multi-family residential buildings. He coordinates technician scheduling, dispatching, and customer communication to ensure fast response times and minimal system downtime across all properties we service in Long Island City and surrounding NYC neighborhoods. Thomas's rigorous approach to operational efficiency means residents experience consistent climate comfort and property managers receive clear, timely updates at every stage of service.
Application Engineer
Ramil designs HVAC systems precisely tailored to the performance, efficiency, and compliance needs of each multi-family building. From equipment selection and technical planning to application support and code-compliant documentation, he ensures that every system Denair HVAC installs in Long Island City delivers long-lasting reliability and measurable energy savings. His engineering expertise is particularly valuable for complex multi-unit projects where precise load calculations, zoning strategies, and NYC Local Law 97 compliance requirements demand a rigorous, detail-oriented approach from day one.
Lead Estimator
Farrukh has been a cornerstone of Denair HVAC since 2010, bringing deep expertise in bid preparation and project cost optimization. As Lead Estimator, he is responsible for developing comprehensive, accurate proposals for multi-family HVAC projects of all sizes—tracking opportunities with vendors, subcontractors, and clients to ensure every bid is competitive and strategically value-engineered. His individual approach to each project means property owners and managers across Long Island City receive detailed scope breakdowns with alternates and revisions, empowering them to make informed decisions and maximize their HVAC budget.
Denair HVAC services the full spectrum of multi-family residential properties in Long Island City, including high-rise apartment towers, mid-rise condominiums, co-ops, mixed-use residential buildings, and converted loft developments. Our team is experienced with the specific mechanical and compliance demands of dense urban residential buildings across Queens and the broader NYC metro area.
Speak with a Denair HVAC expert for a free, no-obligation consultation tailored to your multi-family property.
Denair HVAC serves multi-family properties across Long Island City and the entire New York metro region, from Manhattan to Nassau County.
11+ Regions
Service Area
24/7 Response
Emergency Availability
400+ Projects
Projects Completed
Contact us to confirm coverage for your property and get a free project estimate.
Recognized as one of America's fastest-growing companies.
All technicians hold full OSHA safety certification.
Fully licensed for HVAC work across New York State.
Share your project details and a Denair HVAC specialist will respond promptly with a tailored, no-obligation proposal—including value-engineered options to maximize your budget.
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