HVAC Installation
Turnkey commercial HVAC installation with full project management, in-shop ductwork fabrication, and value engineering that saves clients up to 35% on budget. Handles jobs from $10,000 to $5,000,000.
Queens property owners and managers trust Denair HVAC for full-service mechanical contracting — from turnkey HVAC installation and 24/7 emergency repairs to energy-saving upgrades that tackle the borough's demanding year-round climate. With 19+ years of NYC experience, a 28-person certified team, and projects ranging from $10K to $5M, we deliver on time and within budget.
End-to-end commercial and residential HVAC solutions for Queens properties, from new installations to round-the-clock emergency repairs.
Turnkey commercial HVAC installation with full project management, in-shop ductwork fabrication, and value engineering that saves clients up to 35% on budget. Handles jobs from $10,000 to $5,000,000.
Licensed technicians service, maintain, and repair all residential and commercial air conditioning and heating equipment across Queens — free estimates available for every call.
Certified technicians on call around the clock, arriving fully equipped to handle urgent HVAC failures on all major brands — typically within 4 hours to minimize operational downtime.
Modernize aging equipment with targeted retrofits and expert tune-ups that improve performance, enhance comfort, and bring systems into compliance with current NYC energy standards.
Customized maintenance plans that extend system lifespan, reduce energy costs, and prevent surprise breakdowns — including up to 18 months of free preventive maintenance on all new installations.
Smart building controls and automation solutions designed to significantly cut energy costs and environmental impact, while keeping Queens facilities compliant with NYC's LL97 sustainability mandates.
A dedicated estimator visits your Queens property to evaluate existing systems, assess structural constraints, and fully scope the project — identifying cost-saving opportunities before a single proposal is written.
See how Queens businesses and property managers achieved lasting comfort and savings 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!"
"I know DENAIR for years dealing with their commercial insurance matters. I know they provide best in class services and have recommended them to a couple of major construction industry players. I can definitely say – the bigger the project the bigger my commission is"
"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"
"Crew was respectful, fast, and left our place spotless. Five stars."
"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!"
"I know DENAIR for years dealing with their commercial insurance matters. I know they provide best in class services and have recommended them to a couple of major construction industry players. I can definitely say – the bigger the project the bigger my commission is"
"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"
"Crew was respectful, fast, and left our place spotless. Five stars."
"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!"
"I know DENAIR for years dealing with their commercial insurance matters. I know they provide best in class services and have recommended them to a couple of major construction industry players. I can definitely say – the bigger the project the bigger my commission is"
"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"
"Crew was respectful, fast, and left our place spotless. Five stars."
"Denair is the most dependable HVAC service company in New York!"
Queens contractors and property managers choose Denair for one reason: we deliver more value, more reliably, than anyone else in NYC.
All unintended costs are covered at our expense — your Queens project budget never gets blindsided.
Same-day emergency service, usually within 4 hours, keeps Queens facilities running with zero prolonged downtime.
OSHA-certified, manufacturer-trained technicians with a minimum of 5 years of experience handle every Queens job.
Named one of America's fastest-growing companies — a track record Queens property owners can rely on.
The experienced professionals delivering HVAC excellence across Queens and all of NYC.
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.
A Building Automation System (BAS) for a commercial property in Queens typically ranges from $2.50 to $7.00 per square foot, depending on building size, system complexity, and the number of integrated subsystems. A basic retrofit for a mid-size commercial building may cost $15,000–$50,000, while a full new-construction BAS installation can exceed $200,000. Denair provides fixed-price proposals with detailed scope breakdowns so there are no budget surprises.
Talk to a Denair expert today for a free consultation and fixed-price estimate.
Denair HVAC serves commercial and residential clients across Queens and the entire New York metro area, delivering expert HVAC contracting wherever you need it.
11 Regions
Service Area
24/7 Service
Emergency Availability
400+ Jobs
Projects Completed
Contact us to confirm coverage and schedule your free on-site assessment today.
Recognized as one of America's fastest-growing companies.
Full OSHA safety compliance on every job site.
Licensed HVAC contractor operating across NYC and New York State.
Fill out the form below and a Denair HVAC expert will reach out within one business day with a detailed, fixed-price assessment tailored to your Queens property.
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.