Manhattan's dense high-rises, restaurants, and commercial kitchens depend on properly functioning makeup air units to maintain safe indoor air quality and code compliance. Denair HVAC delivers expert makeup air unit repair and full HVAC service across Manhattan — with certified technicians, same-day response, and 19+ years of experience keeping your building's systems running at peak performance.
Comprehensive makeup air unit repair and HVAC solutions for Manhattan commercial and residential properties of every size.
Fast diagnosis and repair of malfunctioning makeup air units in Manhattan commercial buildings, kitchens, and industrial spaces. Certified technicians restore proper airflow, combustion safety, and code compliance with minimal operational downtime.
Around-the-clock emergency HVAC repair service, typically on-site within 4 hours. Technicians arrive fully equipped to handle urgent makeup air unit failures on all major brands, protecting tenants and operations in any season.
Proactive maintenance plans that extend makeup air unit lifespan, reduce energy costs, and prevent unexpected breakdowns. Free preventive maintenance included for up to 18 months on all new installations, with annual contracts available.
Modernize aging makeup air and HVAC equipment with targeted retrofits and expert system tuning. Optimize performance, meet current NYC energy standards, and improve indoor comfort without costly full system replacement.
Smart HVAC controls and automation solutions that significantly reduce energy costs for Manhattan properties. Helps buildings meet NYC's LL97 sustainability mandates while improving system-wide efficiency and environmental performance.
Certified air testing and balancing services with detailed reports upon HVAC installation completion. Ensures makeup air units and HVAC systems deliver the correct airflow volumes required for safety, comfort, and code compliance.
Manhattan's high-density commercial buildings, restaurant kitchens, and mixed-use towers place enormous demand on makeup air units — and a failure can trigger code violations, indoor air quality hazards, or costly shutdowns. Denair HVAC's factory-trained technicians bring 19+ years of NYC field experience to every repair call, arriving typically within 4 hours with the tools and parts to restore safe, efficient airflow. From Midtown office towers to Lower East Side restaurants, we keep your building operating confidently.
See how Manhattan and NYC businesses rely on Denair HVAC for reliable makeup air unit repair and HVAC service.
"Denair is the most dependable HVAC service company in New York!"
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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 am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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."
"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!"
"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!"
"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 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"
"excellent work and quality"
"Crew was respectful, fast, and left our place spotless. Five stars."
"Denair is professional and courteous."
"Impeccable install. You can tell they're pros the moment they walk in."
"Denair is the most dependable HVAC service company in New York!"
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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 am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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."
"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!"
"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!"
"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 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"
"excellent work and quality"
"Crew was respectful, fast, and left our place spotless. Five stars."
"Denair is professional and courteous."
"Impeccable install. You can tell they're pros the moment they walk in."
"Denair is the most dependable HVAC service company in New York!"
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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 am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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."
"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!"
"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!"
"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 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"
"excellent work and quality"
"Crew was respectful, fast, and left our place spotless. Five stars."
"Denair is professional and courteous."
"Impeccable install. You can tell they're pros the moment they walk in."
Denair HVAC combines manufacturer-certified expertise, rapid response, and transparent pricing to deliver dependable makeup air unit repair across Manhattan.
Technicians typically arrive within 4 hours, minimizing downtime for Manhattan's time-sensitive commercial operations.
Factory-trained and OSHA-certified team with over 19 years of hands-on HVAC experience across NYC's diverse building types.
Fixed proposal pricing with no hidden costs — all unintended expenses covered at our own expense, guaranteed.
Deep knowledge of New York City building codes and LL97 mandates ensures every repair and service meets local regulatory standards.
Experienced professionals dedicated to exceptional HVAC service across Manhattan and NYC.
Founder & CEO
Dennis founded Denair HVAC in March 2007, starting with one man and a beat-up used truck in Brooklyn. With over 17 years of hands-on HVAC industry experience spanning every facet of the business — from field repairs to strategic growth — he built the company from the ground up to $2 million in annual revenue within five years. Under his leadership, Denair was recognized by Inc. 5000 as one of America's fastest-growing companies in 2019. Dennis continues to set the strategic vision for Denair's expansion across Manhattan, the five boroughs, and the greater NYC metro region.
Service Manager
Thomas leads Denair HVAC's service operations across Manhattan and the broader NYC service area, ensuring fast technician response times, efficient scheduling, and consistent service quality on every job. He coordinates field technicians and client communication to keep HVAC systems — including makeup air units — running reliably and with minimal disruption. Thomas's focus on reducing operational downtime and delivering a seamless service experience from initial call to job completion makes him an indispensable part of Denair's commitment to same-day service. His leadership ensures clients in Manhattan always receive a smooth, professional interaction from start to finish.
Application Engineer
Ramil designs and supports HVAC systems — including makeup air unit configurations — tailored to each Manhattan building's specific performance and efficiency requirements. He oversees equipment selection, technical planning, and application support to ensure long-lasting reliability, meaningful energy savings, and solutions that are fully compliant with New York City building codes. With a deep understanding of the engineering challenges posed by Manhattan's mix of pre-war and modern commercial buildings, Ramil helps clients select and implement systems that deliver optimal indoor air quality and operational performance for years to come.
Lead Estimator
Farrukh has been a cornerstone of Denair HVAC since 2010, serving as Lead Estimator and bringing a meticulous, client-focused approach to every bid. He is responsible for preparing comprehensive, timely bid proposals and tracking opportunities with vendors, subcontractors, and customers across Manhattan and the NYC metro area. Farrukh's expertise in value engineering consistently identifies cost-saving opportunities without compromising quality — a key reason Denair's clients have saved over $186,000 on commercial HVAC projects in recent months. His individual approach to every bid ensures clients receive accurate scopes, alternates, and revisions that fit their budget.
A makeup air unit (MAU) replaces air exhausted from a building — common in commercial kitchens, laboratories, and high-rise mechanical systems throughout Manhattan. When an MAU fails, it can cause negative pressure, poor indoor air quality, combustion hazards, and code violations. Regular maintenance and prompt repair restore safe airflow, protect occupants, and keep your building compliant with NYC Department of Buildings requirements.
Speak with a certified Denair HVAC technician for a free consultation and honest assessment.
Denair HVAC provides makeup air unit repair and HVAC service across Manhattan and all surrounding NYC boroughs and counties.
11 Regions
Service Area
24/7 Service
Emergency Availability
Within 4 Hours
Response Time
Contact us to confirm coverage and schedule your makeup air unit repair today.
Named one of America's fastest-growing companies.
All technicians hold OSHA 40-hour safety certification.
Licensed HVAC and mechanical contractor in New York.
Fill out the form below and a Denair HVAC specialist will reach out promptly to discuss your needs, provide a free estimate, and arrange a service visit — often the same day.
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