MAU Installation
Turnkey make-up air unit installation with full project management, ductwork fabrication, controls integration, and code-compliant commissioning for new construction and retrofit projects in Long Island City.
Long Island City's commercial buildings and mixed-use developments demand precise ventilation to meet NYC code and maintain healthy indoor environments. Denair HVAC delivers expert make-up air unit service—installation, repair, and maintenance—ensuring your MAU operates at peak efficiency year-round, balancing fresh air supply, temperature control, and energy performance for every facility type.
Comprehensive MAU solutions for commercial, industrial, and residential properties across Long Island City and the NYC metro area.
Turnkey make-up air unit installation with full project management, ductwork fabrication, controls integration, and code-compliant commissioning for new construction and retrofit projects in Long Island City.
Fast diagnosis and repair of all make-up air unit components—burners, fans, filters, controls, and dampers—restoring proper ventilation and airflow with same-day service available across Queens and NYC.
Customized MAU maintenance plans that extend equipment lifespan, improve energy efficiency, and prevent costly breakdowns through scheduled inspections, filter replacements, and system tune-ups.
Round-the-clock emergency make-up air unit service with certified technicians on call, arriving fully equipped to resolve urgent failures within 4 hours—minimizing downtime for your building or business.
Certified air testing and balancing following MAU installation or repair, ensuring systems deliver the correct fresh air volume, pressure, and temperature as designed and required by NYC building codes.
Retrofit and upgrade existing make-up air units with modern controls, energy-efficient components, and smart automation—optimizing performance and helping Long Island City facilities meet current energy standards.
Our certified estimator visits your Long Island City facility to assess the existing ventilation system, review building specifications, identify code requirements, and define the full scope of work—ensuring no surprises.
See how Denair HVAC has delivered reliable make-up air unit solutions for Long Island City facilities and beyond.
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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 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"
"Denair is the most dependable HVAC service company in New York!"
"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 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..."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"excellent work and quality"
"Impeccable install. You can tell they're pros the moment they walk in."
"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."
"Denair is professional and courteous."
"Crew was respectful, fast, and left our place spotless. Five stars."
"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!"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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 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"
"Denair is the most dependable HVAC service company in New York!"
"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 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..."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"excellent work and quality"
"Impeccable install. You can tell they're pros the moment they walk in."
"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."
"Denair is professional and courteous."
"Crew was respectful, fast, and left our place spotless. Five stars."
"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!"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"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 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"
"Denair is the most dependable HVAC service company in New York!"
"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 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..."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"excellent work and quality"
"Impeccable install. You can tell they're pros the moment they walk in."
"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."
"Denair is professional and courteous."
"Crew was respectful, fast, and left our place spotless. Five stars."
"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!"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
Long Island City property managers and business owners trust Denair HVAC for make-up air unit service that's fast, code-compliant, and built to last.
OSHA-certified, manufacturer-trained technicians handle MAU service to NYC mechanical codes and standards.
Emergency MAU repairs dispatched within 4 hours across Long Island City, Queens, and the greater NYC metro area.
Dedicated estimators identify cost-saving equipment alternatives, cutting your make-up air unit project budget by up to 35%.
Over 400 completed projects and Inc. 5000 recognition as one of America's fastest-growing HVAC contractors.
Experienced professionals dedicated to your Long Island City HVAC needs.
Founder & CEO
Dennis founded Denair HVAC in March 2007 with nothing more than a beat-up used truck and a commitment to honest, high-quality HVAC service across the New York metro area. With over 17 years of hands-on experience in every aspect of the HVAC industry—from make-up air units to full commercial system installations—he has grown the company from a one-man operation to a $2M+ revenue contractor serving Long Island City, Queens, Manhattan, and beyond. His leadership has earned Denair recognition on the Inc. 5000 list of America's fastest-growing companies, driven by a culture of transparency, technical excellence, and an unwavering commitment to client satisfaction.
Service Manager
Thomas leads Denair HVAC's service operations across the NYC metro, including Long Island City and Queens, ensuring every make-up air unit service call is handled with speed, precision, and care. He is responsible for technician dispatch, scheduling, and quality oversight—coordinating seamlessly between field crews and clients to minimize system downtime. Thomas's focus on fast response times and consistent service quality means your MAU issues are diagnosed and resolved efficiently, keeping your building's ventilation running reliably through every season New York throws at it.
Application Engineer
Ramil designs and supports HVAC systems—including make-up air units—tailored to the specific performance, efficiency, and compliance needs of Long Island City and NYC buildings. He oversees equipment selection, technical planning, and application engineering to ensure every MAU installation delivers long-lasting reliability, measurable energy savings, and full code compliance. Ramil's expertise in matching the right equipment to each building's unique mechanical requirements is central to Denair's value engineering process, helping clients achieve optimal indoor air quality without overextending their budget.
Lead Estimator
Farrukh has been with Denair HVAC since 2010 and brings deep expertise in bid proposal preparation for make-up air unit and commercial HVAC projects throughout the NYC metro area. He works directly with Long Island City property managers, general contractors, and business owners to deliver accurate, competitive proposals with full scope breakdowns, alternates, and value-engineered options. Farrukh's meticulous approach to tracking vendor pricing, subcontractor availability, and equipment lead times ensures every project bid is comprehensive, timely, and optimized for maximum client savings.
A make-up air unit is also commonly called a fresh air handler, replacement air unit, or dedicated outdoor air system (DOAS). In commercial settings, it may be referred to as a MAU or a ventilation air unit. All these terms describe equipment designed to replace air exhausted from a building with conditioned fresh outdoor air, maintaining balanced pressure and healthy indoor air quality.
Our NYC HVAC experts are ready to help—get a free consultation today.
Denair HVAC delivers expert make-up air unit service across Long Island City and the entire NYC metro region.
11+ Regions
Service Area
24/7 Service
Emergency Availability
4.7★ Rated
Customer Rating
Contact us to confirm coverage and schedule your make-up air unit service today.
Named one of America's fastest-growing and most successful companies.
All technicians hold OSHA 40-hour safety certification for commercial job sites.
Licensed and registered HVAC and mechanical contractor in New York State.
Fill out the form below to request a free estimate or schedule service. A Denair HVAC specialist will respond promptly to assess your needs and provide a detailed, no-obligation proposal.
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