HVAC System Upgrades
Modernize outdated ventilation and HVAC equipment with targeted ERV retrofits and expert tuning—optimizing performance, improving indoor air quality, and meeting current NYC energy standards without a full system replacement.
Manhattan's dense, aging building stock presents unique ventilation challenges—from pre-war co-ops on the Upper West Side to mid-century office towers in Midtown. Denair HVAC's ERV retrofit solutions recover energy from exhaust air, dramatically cut heating and cooling costs, and help buildings meet NYC's increasingly strict LL97 sustainability mandates—all without a full system overhaul.
Comprehensive ERV retrofit and ventilation upgrade services for Manhattan residential, commercial, and mixed-use buildings.
Modernize outdated ventilation and HVAC equipment with targeted ERV retrofits and expert tuning—optimizing performance, improving indoor air quality, and meeting current NYC energy standards without a full system replacement.
Integrate smart controls with your new ERV system to monitor airflow, humidity recovery, and energy usage in real time—significantly reducing operating costs and environmental impact across Manhattan properties.
ERV retrofits are one of the most effective tools for meeting NYC's Local Law 97 carbon emissions limits. We guide Manhattan building owners through compliance strategy, documentation, and implementation from start to finish.
Following every ERV retrofit, certified air testing and balancing services ensure your new ventilation system delivers peak airflow performance, with certified reports provided for building records and code compliance.
Protect your ERV investment with customized preventative maintenance plans. Free preventive maintenance is included for up to 18 months on all new installations, keeping cores clean and heat-exchange efficiency maximized.
Certified technicians are on call around the clock to diagnose and repair ERV and HVAC issues, typically responding within 4 hours—minimizing disruption to tenants, staff, and building operations across Manhattan.
We begin with a thorough on-site audit of your Manhattan building's existing ventilation infrastructure, measuring airflow rates, duct layout, and envelope performance. This step identifies retrofit feasibility and quantifies potential energy savings under real NYC climate conditions.
See how Manhattan building owners and property managers have improved air quality and cut energy costs with our ERV retrofits.
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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"
"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."
"Denair is the most dependable HVAC service company in New York!"
"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"
"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!"
"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!"
"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."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"excellent work and quality"
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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 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"
"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."
"Denair is the most dependable HVAC service company in New York!"
"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"
"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!"
"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!"
"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."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"excellent work and quality"
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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 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"
"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."
"Denair is the most dependable HVAC service company in New York!"
"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"
"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!"
"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!"
"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."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"excellent work and quality"
"Amazing HVAC vendor who is doing multiple accounts for my company."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
Manhattan buildings deserve a contractor who understands the city's unique constraints—tight mechanical rooms, strict code requirements, and demanding timelines. Here's what sets us apart.
Over 19 years serving Manhattan and the NYC metro, with deep knowledge of local building codes, LL97 mandates, and pre-war mechanical challenges.
Our dedicated estimators identify cost-saving alternatives on every ERV retrofit bid, helping Manhattan clients save up to 35% on their HVAC budget without compromising performance.
All unintended scope costs are compensated at our own expense. You get transparent, fixed proposal pricing—no surprise invoices after work begins.
Certified technicians are on call around the clock, typically arriving within 4 hours—keeping your Manhattan building's ventilation systems running in every season.
Experienced specialists dedicated to delivering exceptional ERV retrofit results across Manhattan.
Founder & CEO
Dennis founded Denair HVAC in March 2007 with a single employee and a used truck—growing the company to over $2 million in annual revenue within five years and earning recognition on the Inc. 5000 list of America's fastest-growing companies. With over 17 years of hands-on HVAC industry experience, Dennis has guided Denair's strategic vision from a one-man operation into a 28-person firm serving Manhattan, Brooklyn, Queens, and beyond. His leadership philosophy centers on honesty, commitment, and delivering genuine value to every client—principles that have attracted a strong team of industry professionals and earned the trust of iconic clients including HSBC, WeWork, and Dolce & Gabbana.
Application Engineer
Ramil is the technical backbone of Denair HVAC's ERV retrofit and system design work. He designs and supports HVAC and ventilation systems tailored to each Manhattan building's unique performance and efficiency requirements—taking into account factors like floor-plate constraints, existing ductwork configurations, and NYC energy code compliance. Ramil oversees equipment selection, technical planning, and application support to ensure every ERV installation delivers long-lasting reliability, measurable energy savings, and fully code-compliant operation. His meticulous approach to shop drawings and value engineering proposals has been instrumental in helping clients optimize their HVAC budgets without sacrificing system quality.
Service Manager
Thomas leads Denair HVAC's service operations, ensuring fast response times, efficient scheduling, and consistent service quality across all ERV retrofit and HVAC service projects in Manhattan and the broader NYC metro area. He coordinates field technicians and customer communication to keep systems running reliably, reduce downtime, and deliver a smooth service experience from initial assessment through final commissioning. Thomas's operational discipline is central to Denair's promise of same-day service—typically within four hours—and the company's track record of completing 80% of projects ahead of schedule, never after the agreed deadline.
Lead Estimator
Farrukh has been with Denair HVAC since 2010 and serves as the company's Lead Estimator, responsible for preparing comprehensive and timely bid proposals for ERV retrofits and broader HVAC projects across Manhattan and the NYC metro. He tracks opportunities with vendors, subcontractors, and customers—ensuring every proposal reflects accurate scope breakdowns, alternates, and revisions that align with each building's constraints and budget. Farrukh's expertise in value engineering has been a key driver of Denair's ability to consistently offer pricing 10–35% below market, contributing directly to over $186,000 in client savings on commercial HVAC and ductwork installations in recent months alone.
Yes—ERV retrofits are one of our specialties. In most cases, an energy recovery ventilator can be integrated into an existing HVAC system by connecting to existing ductwork or adding dedicated supply and exhaust runs. Our engineers assess your building's current infrastructure to design the most cost-effective retrofit path, whether that means a ducted unit, a through-wall inline ERV, or a standalone ventilation system.
Speak with a Denair HVAC engineer for a free, no-obligation consultation tailored to your Manhattan building.
Denair HVAC provides ERV retrofit solutions across Manhattan and the entire NYC metro region, including all five boroughs and surrounding counties.
11+ Regions
Service Area
Within 4 Hours
Emergency Response
400+ Projects
Projects Completed
Contact us to confirm coverage and schedule a free ERV retrofit assessment for your property.
Recognized as one of America's fastest-growing companies.
All field technicians hold full OSHA 40-hour safety certification.
Fully licensed HVAC and mechanical contractor registered in New York.
Fill out the form below and a Denair HVAC engineer will contact you to discuss your building's ventilation needs, review retrofit options, and provide a fixed-price proposal—with no obligation and no surprise costs.
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