New York's buildings demand intelligent climate management—from high-rise Manhattan towers to Brooklyn commercial spaces. Denair HVAC delivers cutting-edge building automation and HVAC controls that slash energy costs by up to 58%, optimize comfort across every zone, and keep your systems running smarter around the clock. Discover what modern building intelligence can do for your facility.
Comprehensive automation and controls solutions to modernize your building's climate systems and maximize operational efficiency.
Deploy smart controls and automated systems that dramatically reduce energy consumption and operating costs. Our solutions monitor, adjust, and optimize HVAC performance in real time to cut utility expenses and minimize environmental impact.
Seamlessly integrate your HVAC equipment into a centralized Building Management System. We configure control sequences, communication protocols, and dashboards so facility managers gain full visibility and command over every system.
Modernize outdated controls and equipment with targeted retrofits and smart upgrades. We bring legacy systems up to current automation standards, enhancing performance, comfort, and compliance without requiring full system replacement.
Our engineers design tailored HVAC control strategies and produce detailed shop drawings and submittals. Value engineering optimizes every specification to deliver high-performance automation solutions within your project budget.
Verify that every automated control sequence and sensor performs exactly as designed. Our certified technicians conduct rigorous testing, air balancing, and commissioning to ensure your smart building systems operate at peak efficiency from day one.
Protect your automation investment with structured maintenance programs. Regular inspections, software updates, and proactive servicing keep controls calibrated and reliable year-round, reducing unexpected downtime and extending system lifespan.
We begin with a thorough on-site evaluation of your existing HVAC equipment, wiring infrastructure, and operational patterns. For NYC buildings—where older mechanical rooms and tight electrical risers are common—this audit identifies every opportunity to integrate smart controls effectively.
See how New York businesses and property managers have transformed their buildings with Denair HVAC automation.
"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..."
"Quiet, efficient, and the app control is amazing. My ConEd bills dropped hard."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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 am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"Denair is the most dependable HVAC service company in New York!"
"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!"
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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 professional and courteous."
"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"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"excellent work and quality"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"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..."
"Quiet, efficient, and the app control is amazing. My ConEd bills dropped hard."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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 am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"Denair is the most dependable HVAC service company in New York!"
"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!"
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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 professional and courteous."
"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"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"excellent work and quality"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"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..."
"Quiet, efficient, and the app control is amazing. My ConEd bills dropped hard."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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 am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"Denair is the most dependable HVAC service company in New York!"
"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!"
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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 professional and courteous."
"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"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"excellent work and quality"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
Here's what sets Denair apart as New York's trusted smart building automation partner.
Over 19 years serving Manhattan, Brooklyn, Queens, and the greater New York metro area with proven automation solutions.
28 OSHA-certified technicians trained by major manufacturers, delivering code-compliant installs across all New York boroughs.
Our engineering approach consistently saves clients up to 35% on project costs while meeting or exceeding performance specifications.
All unintended costs are covered at our expense—transparent, guaranteed pricing protects your budget from start to finish.
Experienced professionals dedicated to smarter, more efficient buildings.
Founder & CEO
Dennis founded Denair HVAC in March 2007 with a single used truck and a vision to bring honest, high-quality mechanical services to New York. With over 17 years of hands-on HVAC industry experience spanning every aspect of the business—from field installation to enterprise leadership—he has grown Denair from a one-man operation to a $2M+ revenue company recognized by the Inc. 5000 as one of America's fastest-growing businesses. His leadership drives Denair's push into smart building automation, ensuring clients across Manhattan, Brooklyn, and the greater NYC metro receive future-ready, energy-efficient solutions.
Application Engineer
Ramil is Denair's resident expert in HVAC system design and building automation engineering. He tailors control strategies and equipment selections to each building's unique performance and efficiency requirements, overseeing technical planning, sensor integration, and BMS architecture from concept through commissioning. His work ensures that every smart building solution Denair delivers is energy-code compliant, reliable, and optimized for long-term operational savings. Ramil's deep familiarity with NYC building stock—including older pre-war mechanical systems across Brooklyn and the Bronx—makes him an invaluable asset on complex retrofit and automation projects.
Lead Estimator
Farrukh has been a cornerstone of Denair's operations since 2010, bringing deep expertise in bid preparation, scope analysis, and vendor negotiations for complex commercial HVAC and automation projects. He has contributed to over $76M in project bids, delivering meticulously detailed proposals that identify value engineering opportunities and alternative equipment options that save clients thousands without compromising performance. His individual approach—providing dedicated scope breakdowns, alternates, and rapid revisions—ensures that every smart building controls proposal is accurate, competitive, and tailored to the specific needs of the client.
Service Manager
Thomas leads Denair HVAC's service operations, overseeing scheduling, technician coordination, and quality assurance across all active projects and maintenance accounts throughout New York. His focus on fast response times and consistent service delivery is especially critical for building automation clients, where a controls issue can affect entire floors or facilities. Thomas ensures that every service call—whether a routine preventive maintenance visit or an urgent controls fault—is handled efficiently, minimizing downtime and keeping smart building systems performing exactly as designed for property managers and facility operators across the five boroughs.
75F is a cloud-based smart building platform that uses predictive algorithms and wireless sensors to automatically optimize HVAC operation. It continuously monitors temperature, occupancy, humidity, and outdoor conditions, then adjusts dampers, setpoints, and equipment schedules in real time. The result is consistent comfort across all zones and energy savings typically ranging from 25% to 40% compared to conventional controls.
Our engineers are ready to assess your building and provide expert guidance at no obligation.
Denair HVAC provides smart building automation services across New York City and the greater metropolitan region.
11+ Regions
Service Area
24/7 Emergency
Availability
4.7★ Rated
Customer Rating
Contact us to confirm coverage and schedule a free building automation assessment.
Named one of America's fastest-growing companies.
All technicians hold OSHA 40-hour safety certification.
Licensed and registered HVAC contractor in New York.
Fill out the form below and one of our building automation specialists will reach out to schedule a free assessment of your facility and provide a detailed, no-obligation project 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