Full System Replacement
Turnkey commercial HVAC replacement with end-to-end project management, covering equipment, ductwork, piping, controls, and commissioning—handling projects from $10,000 to $5,000,000 across Manhattan.
Manhattan's dense commercial buildings—from Midtown high-rises to Lower East Side retail corridors—demand HVAC systems that perform year-round without interruption. Denair HVAC delivers expert commercial HVAC replacement services with value-engineered pricing, saving clients up to 35% on project costs, backed by a 10-year extended warranty and a team of 28 certified technicians ready to keep your operations running.
Comprehensive replacement and upgrade solutions for Manhattan commercial properties of every size and complexity.
Turnkey commercial HVAC replacement with end-to-end project management, covering equipment, ductwork, piping, controls, and commissioning—handling projects from $10,000 to $5,000,000 across Manhattan.
Modernize outdated commercial equipment with targeted retrofits and expert tuning to optimize performance, enhance occupant comfort, and meet current NYC energy efficiency standards without full replacement.
Variable Refrigerant Flow and split system replacements ideal for Manhattan commercial properties with rooftop or balcony access, delivering precise zone-by-zone climate control and energy savings.
Replace aging controls with smart building automation and energy management systems that significantly reduce utility costs and help Manhattan businesses meet NYC's stringent LL97 emissions mandates.
Expert guidance through NYC Local Law 97 sustainability mandates, replacing non-compliant HVAC systems with code-meeting equipment to avoid costly penalties affecting Manhattan property owners.
Protect your new HVAC investment with customized maintenance programs. All new Manhattan installations include free preventative maintenance for up to 18 months, extending system lifespan and reliability.
Our licensed engineers conduct a thorough on-site evaluation of your existing Manhattan commercial HVAC system, assessing equipment condition, building load requirements, NYC building code compliance, and LL97 sustainability obligations before recommending any replacement strategy.
See how Manhattan and NYC commercial clients achieved real savings and improved comfort with Denair HVAC.
"Denair is the most dependable HVAC service company in New York!"
"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 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"
"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 am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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."
"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."
"Crew was respectful, fast, and left our place spotless. Five stars."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"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!"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"excellent work and quality"
"Denair is the most dependable HVAC service company in New York!"
"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 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"
"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 am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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."
"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."
"Crew was respectful, fast, and left our place spotless. Five stars."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"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!"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"excellent work and quality"
"Denair is the most dependable HVAC service company in New York!"
"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 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"
"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 am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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."
"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."
"Crew was respectful, fast, and left our place spotless. Five stars."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"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!"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"excellent work and quality"
Manhattan's commercial properties demand a contractor who delivers on time, within budget, and with zero compromise on quality.
Clients across Manhattan save up to 35% on replacement projects through our proven value engineering approach, identifying equal-performance equipment at lower cost.
We navigate NYC's Local Law 97 compliance requirements, ensuring every Manhattan replacement meets current sustainability mandates and avoids costly penalties.
Around-the-clock emergency repair support with same-day response—usually within 4 hours—keeps Manhattan businesses operational in every season.
Every commercial HVAC replacement is backed by a 10-year extended warranty on equipment and parts, giving Manhattan property owners long-term peace of mind.
Experienced professionals dedicated to Manhattan's commercial HVAC needs.
Founder & CEO
Dennis founded Denair HVAC in March 2007 with a single used truck and a vision to deliver honest, affordable commercial HVAC services to New York. With over 17 years of hands-on HVAC industry experience, he has grown the company from a one-man operation to a recognized leader in the NYC commercial HVAC space, reaching over $2 million in annual revenue within five years. Under his strategic leadership, Denair was recognized by Inc. 5000 as one of America's fastest-growing companies. Dennis oversees all aspects of the business, ensuring every Manhattan replacement project is delivered with the transparency, commitment, and technical excellence that has defined Denair HVAC since its founding.
Application Engineer
Ramil leads HVAC system design and engineering at Denair, tailoring replacement solutions to each Manhattan commercial building's unique performance and efficiency requirements. He oversees equipment selection, technical planning, shop drawing production, and application support to deliver code-compliant, energy-efficient systems that meet NYC's demanding standards—including LL97 sustainability mandates. Ramil's engineering expertise ensures that every replacement project is optimized for long-term reliability, maximum energy savings, and seamless integration with existing building infrastructure, making him a cornerstone of Denair's ability to execute complex commercial replacement projects across Manhattan and the broader NYC metro area.
Lead Estimator
Farrukh has been a cornerstone of Denair HVAC since 2010, bringing deep expertise in commercial HVAC project estimating to every Manhattan replacement bid. He is responsible for preparing comprehensive, accurate bid proposals in a timely manner, tracking opportunities with vendors, subcontractors, and clients, and applying value engineering strategies that help Manhattan businesses save up to 35% on their HVAC replacement budgets. Farrukh's individual approach—providing dedicated scope breakdowns, alternates, and revisions for every project—ensures clients receive transparent, competitive pricing with no hidden surprises from initial estimate through project completion.
Service Manager
Thomas leads Denair HVAC's service operations across Manhattan and the NYC metro area, ensuring fast response times, efficient technician scheduling, and consistent service quality on every commercial HVAC replacement and repair job. He coordinates field crews and client communication to minimize building downtime during replacement projects, managing the full operational workflow from mobilization through close-out. Thomas's focus on reliability and responsiveness means Manhattan commercial property managers and building owners can count on Denair's team to execute replacements on schedule—with 80% of projects completed ahead of deadline—and to respond rapidly to any post-installation service needs.
Key indicators include systems older than 15 years, frequent breakdowns requiring costly repairs, rising energy bills despite maintenance, inability to maintain consistent temperatures across zones, refrigerant types no longer legally available (such as R-22), and non-compliance with NYC's LL97 emissions laws. Denair's engineers conduct a detailed site assessment to determine whether targeted repairs or a full replacement delivers better long-term value for your Manhattan property.
Speak with a Denair HVAC expert for a free consultation and detailed project estimate.
Denair HVAC serves commercial properties across Manhattan and the greater New York metropolitan area.
11 Regions
Service Area
24/7 Service
Emergency Availability
4.7★ Rated
Google Rating
Contact us to confirm coverage and schedule your free commercial HVAC replacement assessment.
Named one of America's fastest-growing companies in 2019.
Full OSHA safety compliance for all commercial job sites.
Licensed Mechanical/HVAC Contractor registered in New York State.
Submit your project details and a Denair HVAC specialist will respond with a free, no-obligation estimate. Fixed pricing, no hidden costs, and a team that delivers on time—every time.
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