VFD & System Retrofits
Modernize outdated HVAC equipment with targeted VFD retrofits and expert tuning to optimize performance, reduce energy waste, and meet current standards — without costly full system replacement.
Brooklyn's aging commercial buildings face rising energy bills and outdated HVAC controls — VFD retrofits change that equation. Denair HVAC delivers expert Variable Frequency Drive upgrades that slash energy consumption by up to 58%, extend equipment life, and keep your systems NYC-compliant, all without the disruption of a full system replacement.
Comprehensive VFD retrofit and HVAC modernization solutions tailored to Brooklyn commercial and residential properties.
Modernize outdated HVAC equipment with targeted VFD retrofits and expert tuning to optimize performance, reduce energy waste, and meet current standards — without costly full system replacement.
Smart VFD controls and automation solutions that significantly reduce energy costs and environmental impact, delivering measurable utility savings for Brooklyn commercial buildings.
Expert guidance through NYC's Local Law 97 sustainability mandates, ensuring your VFD retrofit upgrades keep your building compliant and ahead of escalating penalty thresholds.
Proactive maintenance plans designed to extend VFD and HVAC system lifespan, reduce energy costs, and prevent unexpected breakdowns — with free preventive maintenance for up to 18 months on new installations.
Certified air testing and balancing services performed after VFD retrofit installations to verify systems operate at peak performance efficiency, with certified reports provided upon completion.
Round-the-clock emergency repair services with certified technicians available on-call, typically responding within 4 hours to restore HVAC operations and minimize operational disruption across Brooklyn.
Our engineers conduct a thorough on-site evaluation of your existing Brooklyn HVAC equipment, reviewing motor loads, current controls, and energy usage patterns to identify every VFD retrofit opportunity and quantify potential savings.
See how Brooklyn and NYC property owners are saving thousands with our VFD retrofit solutions.
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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 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"
"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!"
"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."
"Impeccable install. You can tell they're pros the moment they walk in."
"excellent work and quality"
"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."
"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!"
"Denair is professional and courteous."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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 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"
"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!"
"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."
"Impeccable install. You can tell they're pros the moment they walk in."
"excellent work and quality"
"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."
"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!"
"Denair is professional and courteous."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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 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"
"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!"
"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."
"Impeccable install. You can tell they're pros the moment they walk in."
"excellent work and quality"
"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."
"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!"
"Denair is professional and courteous."
Brooklyn property managers and business owners trust Denair HVAC for transparent, high-performance VFD retrofits that deliver real results.
28 OSHA-certified technicians, each trained and certified by major HVAC manufacturers, with over 19 years serving Brooklyn and NYC buildings.
Value Engineering cuts project costs by up to 35%, and our VFD retrofits reduce Brooklyn clients' energy bills by up to 58% annually.
We navigate NYC's complex Local Law 97 mandates, ensuring every retrofit keeps your Brooklyn property compliant and penalty-free.
All unintended costs are covered at our expense. No surprises — just a firm proposal and on-time delivery, backed by a Terms Guarantee.
Experienced specialists dedicated to delivering expert VFD retrofit solutions across Brooklyn.
Founder & CEO
Dennis founded Denair HVAC in March 2007 with a single used truck and a vision to bring affordable, high-quality HVAC solutions to Brooklyn and the greater NYC metro area. Drawing on over 17 years of hands-on HVAC industry experience, he led the company from a one-man operation to a $2M+ enterprise recognized by Inc. 5000 as one of America's fastest-growing companies. Under his strategic leadership, Denair has completed over 400 projects across all five boroughs and beyond. Dennis champions transparency, value engineering, and a client-first approach — principles that have earned Denair long-term relationships with marquee clients like HSBC, WeWork, and Chick-fil-A.
Application Engineer
Ramil is Denair HVAC's Application Engineer, specializing in designing and supporting HVAC systems — including VFD retrofit solutions — tailored precisely to each Brooklyn building's performance and efficiency needs. He oversees equipment selection, technical planning, and application engineering to ensure every VFD integration delivers lasting energy savings, reliable operation, and full compliance with NYC building codes and LL97 mandates. Ramil's meticulous approach to technical planning means clients receive solutions that are engineered to perform from day one, with the data to prove it.
Service Manager
Thomas leads Denair HVAC's service operations, ensuring fast response times, efficient scheduling, and consistent service quality across all VFD retrofit and HVAC service projects in Brooklyn and the surrounding NYC boroughs. He coordinates technicians and client communication to keep systems running reliably, reduce costly downtime, and deliver a smooth service experience from the initial site visit through to final commissioning and handover. Thomas's operational expertise means Brooklyn clients can count on on-time delivery and responsive support throughout their retrofit project.
Lead Estimator
Farrukh has been a cornerstone of the Denair HVAC team since 2010, bringing deep expertise in bid proposal preparation, scope analysis, and cost optimization for HVAC and VFD retrofit projects across Brooklyn and NYC. As Lead Estimator, he is responsible for preparing comprehensive, timely bid proposals and tracking opportunities with vendors, subcontractors, and clients. His Value Engineering approach consistently identifies savings opportunities — often reducing VFD retrofit project costs by up to 35% — while maintaining full performance standards. Farrukh's dedication to accuracy and detail gives Brooklyn clients confidence in every project estimate.
A Variable Frequency Drive (VFD) is an electronic controller that adjusts the speed of HVAC motors — such as fans, pumps, and compressors — to match actual demand rather than running at full speed continuously. By modulating motor speed, VFDs can reduce energy consumption by 30–58%, extend equipment lifespan, and significantly lower utility bills for Brooklyn commercial and residential properties.
Talk to our Brooklyn HVAC engineers for a free consultation and site assessment.
Denair HVAC delivers expert VFD retrofit services across Brooklyn and all NYC boroughs and surrounding counties.
11 Regions Covered
Service Area
24/7 On-Call
Emergency Availability
4.7★ Rated
Customer Rating
Contact us to confirm coverage and schedule your free VFD retrofit assessment today.
Named one of America's fastest-growing companies.
All technicians hold full OSHA 40-hour safety certification.
Fully licensed and registered mechanical contractor in New York.
Fill out the form below and a Denair HVAC engineer will contact you within one business day to discuss your VFD retrofit needs, review your current system, and provide a no-obligation fixed-price estimate.
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