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.
"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."
"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."
"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"
"Amazing HVAC vendor who is doing multiple accounts for my company."
"excellent work and quality"
"Denair is the most dependable HVAC service company in New York!"
"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."
"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."
"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"
"Amazing HVAC vendor who is doing multiple accounts for my company."
"excellent work and quality"
"Denair is the most dependable HVAC service company in New York!"
"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."
"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."
"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"
"Amazing HVAC vendor who is doing multiple accounts for my company."
"excellent work and quality"
"Denair is the most dependable HVAC service company in New York!"
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 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.
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.
For immediate assistance, feel free to give us a direct call at 718-791-5074.