HVAC Installation
Turnkey multifamily HVAC installation with end-to-end project management, in-shop ductwork fabrication, and value engineering that saves clients up to 35% on capital improvement projects.
Manhattan's dense residential towers and aging building stock demand an HVAC partner who understands co-op boards, managing agents, and NYC's strict LL97 compliance requirements. Denair HVAC delivers turnkey multifamily HVAC installation, repair, and maintenance across Manhattan—with 19+ years of experience, 28 certified technicians, and a track record of saving clients up to 35% through value engineering.
Comprehensive HVAC solutions tailored for Manhattan multifamily properties—from new installations to emergency repairs and code compliance.
Turnkey multifamily HVAC installation with end-to-end project management, in-shop ductwork fabrication, and value engineering that saves clients up to 35% on capital improvement projects.
Variable Refrigerant Flow and split systems ideal for Manhattan apartment buildings with rooftop or balcony access, providing precise zone-by-zone climate control for each unit.
Customized maintenance plans that extend equipment lifespan, reduce energy costs, and prevent costly breakdowns—with free preventive maintenance included for up to 18 months on all new installations.
Round-the-clock emergency HVAC repair for multifamily buildings, with certified technicians dispatched same day—usually within 4 hours—to restore tenant comfort with minimal disruption.
Expert guidance through NYC's Local Law 97 sustainability mandates, helping multifamily building owners avoid significant penalties and meet carbon emissions reduction requirements.
Targeted retrofits and expert system tune-ups to modernize aging multifamily HVAC equipment, optimize performance, and meet current NYC energy standards without full system replacement.
Manhattan's multifamily market presents unique HVAC challenges—aging infrastructure, limited mechanical rooms, co-op board approvals, and strict Local Law 97 carbon mandates. Denair HVAC specializes in navigating these complexities for building owners and property managers. Our 28 certified technicians deliver code-compliant, value-engineered solutions that have saved clients over $186,000 in the last six months alone. From pre-war walk-ups on the Upper West Side to modern high-rises in Hudson Yards, we keep every tenant comfortable year-round.
See how Denair HVAC has delivered reliable comfort and real savings for multifamily buildings across Manhattan and NYC.
"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!"
"Impeccable install. You can tell they're pros the moment they walk in."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"Crew was respectful, fast, and left our place spotless. Five stars."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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..."
"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."
"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!"
"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 was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely 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."
"excellent work and quality"
"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!"
"Impeccable install. You can tell they're pros the moment they walk in."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"Crew was respectful, fast, and left our place spotless. Five stars."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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..."
"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."
"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!"
"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 was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely 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."
"excellent work and quality"
"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!"
"Impeccable install. You can tell they're pros the moment they walk in."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"Crew was respectful, fast, and left our place spotless. Five stars."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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..."
"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."
"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!"
"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 was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely 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."
"excellent work and quality"
Manhattan property managers and building owners choose Denair HVAC for our proven track record, transparent pricing, and deep expertise in NYC's multifamily market.
Save up to 35% on HVAC budgets through value engineering—identifying equal-performance equipment at lower cost for every Manhattan project.
All unintended costs compensated at our own expense—no budget surprises for NYC building owners or property managers.
24/7 emergency repairs with same-day service—usually within 4 hours—keeping Manhattan tenants comfortable in any season.
Registered Mechanical Contractor with deep expertise in NYC's LL97 mandates and local building codes across all five boroughs.
Experienced professionals dedicated to delivering exceptional multifamily HVAC solutions across Manhattan.
Founder & CEO
Dennis founded Denair HVAC in March 2007 with a single used truck and a vision to deliver honest, affordable mechanical contracting across New York City. Drawing on 17+ years of hands-on HVAC industry experience, he has grown the company from a one-man operation into a $2M+ revenue enterprise recognized by Inc. 5000 as one of America's fastest-growing companies. Dennis leads Denair's strategic direction, championing value engineering and fixed-price contracts that protect multifamily building owners and property managers throughout Manhattan and the broader NYC market from budget overruns and compliance headaches.
Financial Manager
Tanya brings over 15 years of expertise in financial management, budgeting, forecasting, and insurance to Denair HVAC. She oversees all aspects of the company's accounting and financial operations, ensuring that project pricing remains transparent and that clients receive the cost certainty they depend on. Her meticulous financial stewardship underpins Denair's fixed-price guarantee and its ability to offer competitive, value-engineered proposals for multifamily HVAC projects across Manhattan and the greater New York area—giving property managers and building owners full confidence in their investment.
Lead Estimator
Farrukh has been a cornerstone of the Denair HVAC team since 2010, bringing unparalleled expertise in bid proposal preparation for multifamily and commercial HVAC projects throughout New York City. As Lead Estimator, he prepares comprehensive, accurate proposals in a timely manner, tracks opportunities with vendors, subcontractors, and clients, and delivers the detailed scope breakdowns and alternates that enable Denair's value engineering process. His work directly enables clients to save up to 35% on HVAC budgets—a critical advantage on Manhattan's high-cost construction landscape.
Service Manager
Thomas leads Denair HVAC's service operations with a focus on speed, reliability, and tenant satisfaction across Manhattan's multifamily portfolio. He oversees technician scheduling, dispatch coordination, and customer communication to ensure every service call—from routine maintenance to emergency repairs—is handled with efficiency and care. Under Thomas's leadership, Denair consistently achieves same-day response times, typically within 4 hours, reducing downtime for building operators and minimizing disruption to residents in NYC's demanding residential market.
Application Engineer
Ramil designs and engineers HVAC systems precisely tailored to each multifamily building's unique performance and energy efficiency requirements. He oversees equipment selection, technical planning, and application engineering support—ensuring every system installed in Manhattan's diverse building stock is code-compliant, energy-efficient, and built for long-term reliability. From navigating the tight mechanical spaces of pre-war co-ops to designing modern VRF systems for new high-rise developments, Ramil's technical expertise ensures Denair's solutions meet NYC's evolving LL97 sustainability standards and deliver measurable energy savings.
HVAC installation costs in NYC vary widely based on building size, system type, and scope. For multifamily properties, projects typically range from $10,000 to $5,000,000. Denair HVAC's value engineering process consistently saves clients up to 35% compared to standard bids—our clients saved over $186,000 on commercial HVAC installations in the last six months alone. Contact us for a free, itemized estimate tailored to your building.
Speak with a Denair HVAC specialist for a free consultation and project estimate tailored to your multifamily property.
Denair HVAC serves multifamily properties across Manhattan, all NYC boroughs, and the surrounding tri-state metro area.
11 Regions
Service Area
Within 4 Hours
Emergency Response
400+ Projects
Projects Completed
Contact us to confirm coverage and schedule a free on-site assessment for your multifamily property.
Named one of America's fastest-growing companies in 2019.
All technicians hold OSHA 40-hour safety certification.
Fully 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 building's HVAC needs, provide a detailed scope breakdown, and deliver a value-engineered proposal—at no cost or obligation.
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