AC Repair & Diagnostics
Expert troubleshooting and repair for all makes and models of air conditioning equipment. Our licensed technicians diagnose issues accurately and restore cooling fast—often on the same day you call.
Long Island City's dense high-rises and humid summers put serious strain on AC systems. Denair HVAC delivers fast, reliable air conditioning repair with licensed technicians, same-day service within 4 hours, free estimates, and 24/7 emergency response—keeping your home or business cool and comfortable no matter the season.
Comprehensive AC repair and maintenance solutions for residential and commercial properties throughout Long Island City and NYC.
Expert troubleshooting and repair for all makes and models of air conditioning equipment. Our licensed technicians diagnose issues accurately and restore cooling fast—often on the same day you call.
Round-the-clock emergency AC repair with response times typically within 4 hours. Certified technicians arrive fully equipped to handle urgent breakdowns on all major HVAC brands, minimizing disruption.
Proactive maintenance plans designed to extend your AC system's lifespan, reduce energy costs, and prevent unexpected breakdowns. Free preventive maintenance included for up to 18 months on new installations.
Modernize outdated equipment with targeted retrofits and expert tuning to optimize AC performance, enhance comfort, and meet current energy standards—without requiring a full system replacement.
Installation and repair of Variable Refrigerant Flow and split systems—ideal for Long Island City buildings with rooftop or balcony access, offering superior zoning and energy efficiency.
Professional ductwork cleaning and installation to improve indoor air quality and system efficiency. Proper duct maintenance ensures your AC delivers consistent, clean cooling throughout every room.
Long Island City's mix of high-rise apartments, co-ops, and commercial spaces demands AC repair expertise that understands New York's unique building stock. Denair HVAC's licensed technicians are trained and certified by major manufacturers, handling systems from ½ to 100 tons. With same-day service typically within 4 hours, free estimates, and a quality guarantee, we restore your comfort without surprises—upfront pricing, no hidden fees, ever.
See how Long Island City residents and NYC businesses rely on Denair HVAC for expert AC repair.
"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 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 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..."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"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!"
"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!"
"Crew was respectful, fast, and left our place spotless. Five stars."
"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."
"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."
"excellent work and quality"
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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 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 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..."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"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!"
"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!"
"Crew was respectful, fast, and left our place spotless. Five stars."
"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."
"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."
"excellent work and quality"
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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 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 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..."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"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!"
"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!"
"Crew was respectful, fast, and left our place spotless. Five stars."
"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."
"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."
"excellent work and quality"
"Amazing HVAC vendor who is doing multiple accounts for my company."
Here's what sets us apart as Long Island City's most trusted air conditioning repair team.
We arrive within 4 hours for urgent AC repairs across Long Island City and Queens.
All technicians are certified by major manufacturers and hold OSHA credentials.
Free estimates with fixed proposal pricing—no surprise costs, ever.
Serving NYC since 2007, Denair has completed 400+ projects across the metro area.
Dedicated professionals committed to keeping Long Island City cool.
Founder & CEO
Dennis founded Denair HVAC in March 2007 with one man and a beat-up used truck, driven by a vision to deliver honest, affordable HVAC service to New York. With over 17 years of hands-on industry experience, he has guided the company from a one-person operation to a $2M+ enterprise recognized by Inc. 5000 as one of America's fastest-growing companies. Dennis leads Denair's strategic vision with a focus on transparency, quality craftsmanship, and exceeding client expectations across Long Island City and the entire NYC metro area.
Service Manager
Thomas leads Denair HVAC's service operations with a relentless focus on fast response times and consistent quality. He coordinates technician dispatching, customer communication, and scheduling to ensure every air conditioning repair call in Long Island City and beyond is handled efficiently from first contact to job completion. His operational expertise means less downtime for clients—whether it's a residential AC unit in a Queens high-rise or a commercial system in a busy retail space. Thomas is the backbone of Denair's promise to deliver same-day service, usually within 4 hours.
Application Engineer
Ramil brings deep technical expertise to every air conditioning repair and system design project at Denair HVAC. He oversees equipment selection, technical planning, and application support—ensuring every system is tailored to the specific performance and efficiency demands of the building. Whether it's a residential apartment in Long Island City or a multi-tenant commercial property, Ramil ensures solutions are energy-efficient, code-compliant, and built for long-term reliability. His engineering insight helps clients avoid costly repeat repairs by addressing root causes, not just symptoms.
Lead Estimator
Farrukh has been a cornerstone of the Denair HVAC team since 2010, bringing precision and thoroughness to every project estimate. As Lead Estimator, he is responsible for preparing comprehensive bid proposals in a timely manner and tracking opportunities with vendors, subcontractors, and customers. His deep familiarity with NYC's HVAC market—including Long Island City's diverse building types—means clients receive accurate, competitive quotes that eliminate budget surprises. Farrukh's commitment to value engineering helps customers save significantly without compromising on service quality.
Most standard AC repairs are completed within 2 to 4 hours. Simple fixes like refrigerant recharges or capacitor replacements can be done in under an hour, while more complex repairs involving compressors or control boards may take a full day. Denair HVAC technicians arrive fully equipped with common parts, minimizing delays and completing most jobs in a single visit.
Our HVAC experts are ready to help—get a free consultation today.
Denair HVAC serves Long Island City and communities across the entire New York metro area.
NYC & Tri-State
Service Area
Within 4 Hours
Emergency Response
4.7★ Rated
Google Rating
Contact us to confirm coverage and schedule your AC repair today.
Named one of America's fastest-growing companies.
All technicians hold OSHA safety certification.
Licensed Mechanical/HVAC Contractor in New York State.
Fill out the form below and a Denair HVAC specialist will reach out promptly with a free estimate. Same-day appointments available for urgent repairs.
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