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.
"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."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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."
"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"
"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!"
"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..."
"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."
"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."
"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."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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."
"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"
"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!"
"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..."
"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."
"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."
"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."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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."
"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"
"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!"
"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..."
"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."
"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."
"excellent work and quality"
"Denair is the most dependable HVAC service company in New York!"
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 one man and a beat-up used truck right after being laid off from a 7-year career in the HVAC industry. Armed with over 17 years of hands-on HVAC expertise and deep knowledge of Brooklyn and NYC's commercial building landscape, he grew the company to $2 million in revenue within just five years. Under his strategic leadership, Denair earned recognition by Inc. 5000 as one of America's fastest-growing companies. Dennis oversees all aspects of the business—from rooftop unit replacement projects across Brooklyn's flat-roof commercial buildings to large-scale capital improvement contracts throughout the NYC metro area—ensuring every client receives honest, high-quality service.
Financial Manager
Tanya brings over 15 years of experience in finance, budgeting, and forecasting to the Denair HVAC team. She manages all aspects of accounting, financial planning, and insurance for the company—ensuring every rooftop unit replacement and installation project is backed by financial integrity and transparent cost management. Her meticulous approach to budgeting directly supports Denair's ability to offer fixed proposal pricing and value-engineered solutions that consistently save Brooklyn and NYC clients thousands of dollars. Tanya's financial stewardship has been a cornerstone of Denair's steady growth from a one-man operation to a recognized industry leader.
Lead Estimator
Farrukh has been with Denair HVAC since 2010, making him one of the company's longest-serving and most trusted team members. As Lead Estimator, he is responsible for preparing comprehensive and timely bid proposals for rooftop unit replacement and installation projects across Brooklyn and the wider NYC metro area. His expertise in tracking opportunities with vendors, subcontractors, and customers ensures every scope is accurately priced—with alternates and revisions provided for each bid. Farrukh's value engineering approach has helped Brooklyn property managers and business owners save significantly on their HVAC capital improvement budgets.
Service Manager
Thomas leads Denair HVAC's service operations, overseeing fast response times, efficient technician scheduling, and consistent service quality for rooftop unit projects throughout Brooklyn. He coordinates field technicians and customer communications to keep RTU systems running reliably—minimizing downtime for commercial tenants, property managers, and building operators. Thomas ensures that Denair's commitment to same-day service (usually within 4 hours for emergencies) is consistently met, and that every rooftop unit installation or repair is delivered with the smooth, professional experience Brooklyn clients expect from an Inc. 5000-recognized contractor.
Application Engineer
Ramil designs and supports HVAC systems tailored to the specific performance and efficiency needs of each Brooklyn building. Specializing in rooftop unit applications, he oversees equipment selection, technical planning, and engineering support to ensure every RTU installation delivers long-lasting reliability, meaningful energy savings, and full compliance with NYC building codes and LL97 sustainability mandates. Ramil's engineering expertise is particularly valuable for Brooklyn's dense stock of flat-roof commercial and mixed-use buildings, where precise load calculations and rooftop structural considerations are critical to a successful RTU replacement or new installation.
VP Business Development
Anastasiya leads Denair HVAC's business development and new client acquisition strategy, with a focus on building long-term partnerships with property management firms, general contractors, and building owners across Manhattan and the greater NYC metro area. In her role, she identifies market opportunities, develops strategic partnerships, and implements growth initiatives that have helped Denair expand its footprint across some of New York's most recognized property management companies—including AKAM, Douglas Elliman, Related, and Rose Associates. Anastasiya's client-first approach ensures that every new relationship is built on transparency, reliability, and measurable value.
Marketing Manager
Natalja oversees Denair HVAC's brand presence and client relationships, ensuring that building owners, property managers, and facility operators across Manhattan can easily discover and connect with the HVAC expertise they need. As Marketing Manager, she develops and executes strategies that communicate Denair's unique value—from 24/7 emergency availability to Inc. 5000 recognition—to the right audiences across New York City's competitive commercial real estate and residential markets. Her work building public relations and strategic outreach has played a significant role in Denair's growth and continued reputation as one of NYC's most trusted HVAC contractors.
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.
For immediate assistance, feel free to give us a direct call at 718-791-5074.