Preventive Maintenance
Proactive, scheduled MAU inspections and tune-ups that reduce energy costs, prevent surprise breakdowns, and keep your system running efficiently year-round. Customized annual contracts and loyalty programs available.
Manhattan's dense high-rises and demanding building codes make makeup air unit reliability non-negotiable. Denair HVAC's structured maintenance contracts keep your MAU running at peak performance year-round—preventing costly breakdowns, ensuring NYC code compliance, and protecting indoor air quality for tenants, staff, and operations. Get a tailored plan that fits your building's schedule and budget.
Comprehensive MAU maintenance plans designed to maximize uptime, ensure compliance, and extend equipment life in Manhattan buildings.
Proactive, scheduled MAU inspections and tune-ups that reduce energy costs, prevent surprise breakdowns, and keep your system running efficiently year-round. Customized annual contracts and loyalty programs available.
Targeted retrofits and expert tuning for aging makeup air units—modernizing controls, improving energy performance, and ensuring compliance with NYC building standards without full system replacement.
Certified technicians on call around the clock to restore your MAU quickly. Most emergency calls are handled within 4 hours, minimizing disruption to tenants and building operations.
Licensed technicians trained to diagnose and repair all major makeup air unit brands, restoring performance and maintaining air quality standards for commercial and residential Manhattan buildings.
Smart controls and automation solutions integrated into your MAU to significantly reduce energy consumption, support LL97 compliance, and lower operating costs across your Manhattan property.
Certified air testing and balancing services with detailed reports to confirm your makeup air unit is delivering the correct airflow volumes and pressures per design specifications and NYC code.
Our team visits your Manhattan property to evaluate your makeup air unit's make, model, age, and condition. We then design a maintenance contract tailored to your building's usage patterns, occupancy schedule, and NYC compliance requirements.
See how Manhattan property managers and building owners keep their MAUs running reliably with Denair HVAC.
"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."
"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."
"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 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"
"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!"
"Denair is professional and courteous."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"excellent work and quality"
"Being an accountant for many years, I happened to have a few General Contractors working in NYC, I introduced Denair to some of them and got substantial commissions on several contracts they closed on! It's always to make extra cash"
"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."
"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."
"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 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"
"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!"
"Denair is professional and courteous."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"excellent work and quality"
"Being an accountant for many years, I happened to have a few General Contractors working in NYC, I introduced Denair to some of them and got substantial commissions on several contracts they closed on! It's always to make extra cash"
"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."
"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."
"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 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"
"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!"
"Denair is professional and courteous."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"excellent work and quality"
"Being an accountant for many years, I happened to have a few General Contractors working in NYC, I introduced Denair to some of them and got substantial commissions on several contracts they closed on! It's always to make extra cash"
Manhattan building managers trust Denair HVAC for makeup air unit contracts because we combine deep technical expertise with a commitment to reliability and transparency.
Technicians trained and certified by major MAU manufacturers, ensuring expert service on any brand across Manhattan buildings.
Around-the-clock emergency response means your Manhattan property is never left without support, regardless of season or hour.
Over 19 years serving New York buildings means deep familiarity with Local Law requirements, LL97 compliance, and NYC mechanical codes.
Fixed contract pricing with no surprise costs—all unintended expenses compensated at our own expense, protecting your maintenance budget.
Experienced professionals committed to keeping Manhattan buildings comfortable and compliant.
Founder & CEO
Dennis founded Denair HVAC in March 2007 with a single used truck and a vision to bring honest, affordable mechanical contracting to New York. With over 17 years of hands-on HVAC industry experience, he has led the company from a one-man operation to a $2M+ enterprise recognized by the Inc. 5000 as one of America's fastest-growing companies. Dennis oversees strategic direction, ensuring every maintenance contract—including makeup air unit programs across Manhattan—is delivered with the quality and transparency that has become Denair's hallmark. His leadership is grounded in the core values of honesty, commitment, and an unwavering desire to serve New York Metro Area clients.
Service Manager
Thomas leads Denair HVAC's service operations with a sharp focus on fast response times, efficient technician scheduling, and consistent service quality across every maintenance contract. For Manhattan clients with makeup air units, Thomas is the operational backbone ensuring that every scheduled visit happens on time, every priority repair is dispatched without delay, and every customer interaction reflects the professionalism Denair is known for. He coordinates directly between field technicians and property managers to reduce downtime, streamline communication, and deliver a smooth, reliable service experience from the first site assessment through annual contract renewal.
Application Engineer
Ramil brings deep technical engineering expertise to every makeup air unit maintenance program at Denair HVAC. He designs and supports HVAC solutions tailored to each Manhattan building's unique performance and energy efficiency needs—considering factors like high-rise ventilation demands, variable occupancy loads, and Local Law compliance. Ramil oversees equipment selection, technical planning, and application support to ensure MAU systems deliver long-lasting reliability and measurable energy savings. His engineering insight is invaluable when contracts call for controls upgrades, system retrofits, or testing and balancing to bring aging units back to peak specification.
Lead Estimator
Farrukh has been with Denair HVAC since 2010, bringing over a decade of estimating expertise to every maintenance contract proposal. For Manhattan property managers evaluating makeup air unit maintenance programs, Farrukh ensures every bid is comprehensive, competitively priced, and clearly scoped—breaking down service inclusions, alternates, and revisions so there are no surprises at contract signing or renewal. His individual approach to each proposal reflects Denair's commitment to value engineering: identifying cost savings without compromising service quality, helping building owners protect their HVAC investment at the lowest possible contract cost.
Makeup air units in commercial Manhattan buildings should receive a minimum of two comprehensive preventive maintenance visits per year—typically in spring and fall. High-usage facilities such as restaurants, medical offices, or dense residential buildings may require quarterly visits. Regular servicing ensures filters, coils, belts, and controls remain in peak condition, preventing failures during peak heating and cooling seasons.
Talk to our HVAC experts for a free consultation and custom maintenance proposal.
Serving Manhattan and the greater New York Metro Area with expert makeup air unit maintenance and HVAC services.
11 Regions
Service Area
Within 4 Hours
Emergency Response
4.7★ Rated
Customer Rating
Contact us to confirm coverage and get a custom MAU maintenance contract proposal.
Named one of America's fastest-growing companies.
Technicians hold full OSHA 40-hour safety certification.
Licensed mechanical and HVAC contractor in New York.
Fill out the form below and a Denair HVAC specialist will reach out within one business day to discuss your makeup air unit maintenance contract options, schedule a site visit, and provide a transparent, fixed-price 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