Long Island City's commercial buildings demand ventilation systems that handle year-round humidity, dense occupancy, and strict NYC code requirements. Denair HVAC delivers expert commercial ventilation repair services — from exhaust fans to full duct systems — with certified technicians, same-day response, and guaranteed workmanship. Keep your business climate-controlled and compliant without interruption.
Comprehensive ventilation repair and maintenance solutions for Long Island City commercial properties of every size.
Diagnose and restore malfunctioning commercial exhaust fans across offices, kitchens, and restrooms. Our certified technicians repair motors, blades, and controls to ensure proper airflow and code-compliant ventilation throughout your facility.
Seal leaks, remove obstructions, and restore duct integrity to eliminate energy loss and poor air distribution. Essential for Long Island City buildings where aging infrastructure can compromise both comfort and indoor air quality.
Around-the-clock emergency ventilation repair for commercial properties. Certified technicians respond usually within 4 hours, arriving fully equipped to handle urgent failures on all major HVAC brands with minimal operational disruption.
Proactive ventilation maintenance plans designed to extend system lifespan, reduce energy costs, and prevent surprise breakdowns. Includes customized service contracts and a client loyalty program for Long Island City commercial accounts.
Retrofit outdated ventilation equipment with targeted upgrades and expert system tuning. Modernize performance to meet current NYC energy and compliance standards without requiring full system replacement.
Air testing and balancing services with certified reports to verify ventilation systems perform at peak efficiency. Critical after any repair or installation to confirm proper airflow distribution and NYC code compliance.
Our technician arrives at your Long Island City facility — typically within 4 hours — to conduct a thorough inspection of your ventilation system, identifying failure points, code deficiencies, and airflow irregularities before any work begins.
See how Long Island City businesses and commercial properties have benefited from our expert ventilation repair services.
"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 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 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!"
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"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!"
"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."
"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!"
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"excellent work and quality"
"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 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 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!"
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"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!"
"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."
"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!"
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"excellent work and quality"
"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 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 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!"
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"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!"
"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."
"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!"
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"excellent work and quality"
Long Island City commercial property managers and business owners trust Denair HVAC for reliability, speed, and guaranteed results.
We dispatch certified technicians to Long Island City and Queens commercial properties usually within 4 hours of your call.
Every repair proposal comes with fixed pricing — all unintended costs are compensated at our own expense, never passed to you.
Our OSHA-certified team navigates NYC's complex commercial ventilation codes and LL97 compliance requirements with precision.
Recognized as one of America's fastest-growing companies, Denair has served NYC commercial clients for over 19 years with proven results.
Experienced professionals dedicated to keeping your commercial ventilation systems running reliably.
Founder & CEO
Dennis founded Denair HVAC in March 2007 with nothing more than a used truck and a commitment to delivering honest, high-quality HVAC service across New York City. With over 17 years of hands-on experience spanning every aspect of the commercial HVAC industry, he led the company from a one-man operation to a $2M+ revenue business recognized by Inc. 5000 as one of America's fastest-growing companies. Dennis's strategic vision centers on transparency, value engineering, and building long-term relationships with property managers and business owners throughout Queens, Long Island City, and the broader NYC metro area. Under his leadership, Denair has completed over 400 commercial projects, earning a reputation as the city's most affordable and reliable full-service mechanical contractor.
Service Manager
Thomas leads Denair HVAC's service operations across Long Island City and the broader NYC metro area, ensuring that every commercial ventilation repair call receives a fast, coordinated response. He oversees technician scheduling, customer communication, and service quality standards to guarantee that systems are restored with minimal downtime. Thomas's operational discipline is a key reason Denair consistently delivers same-day service — typically within 4 hours — for urgent commercial HVAC and ventilation issues. His focus on reducing operational disruption for businesses, office buildings, and property managers has made him an integral part of the team's ability to maintain consistently high service standards across all five boroughs and beyond.
Application Engineer
Ramil brings deep technical expertise to every commercial ventilation repair and HVAC project at Denair. He designs and supports HVAC and ventilation systems tailored to each building's unique performance, layout, and energy efficiency needs — a critical skill in Long Island City's diverse mix of industrial lofts, modern office towers, and mixed-use developments. Ramil oversees equipment selection, technical planning, and application support to deliver code-compliant, energy-efficient solutions with lasting reliability. His engineering background ensures that every repair and upgrade recommendation is backed by precise calculations, manufacturer certifications, and alignment with NYC's evolving mechanical and sustainability codes.
Lead Estimator
Farrukh has been a cornerstone of Denair HVAC's commercial operations since 2010, bringing over a decade of expertise in preparing comprehensive, accurate bid proposals for commercial HVAC and ventilation repair projects of all sizes. As Lead Estimator, he is dedicated to every bid Denair submits — providing detailed scope breakdowns, alternates, and revisions that help Long Island City property managers and general contractors make fully informed decisions. Farrukh's meticulous approach to tracking opportunities with vendors, subcontractors, and clients is central to Denair's ability to consistently offer pricing that is lower than 90% of competitors while maintaining the highest standards of quality and compliance.
Commercial bathroom exhaust fan repair in Long Island City typically ranges from $150 to $600, depending on the unit size, motor condition, and accessibility. Simple motor or capacitor replacements sit at the lower end, while duct reconnection or full unit replacement with code-compliant installation runs higher. Denair provides a free estimate before any work begins so you know the exact cost upfront.
Talk to a certified Denair HVAC specialist — free consultation, no obligation.
Denair HVAC serves commercial properties across Long Island City and throughout the greater New York Metro Area.
NYC & 5 Boroughs
Service Area
24/7 Response
Emergency Availability
4.7★ Rated
Customer Rating
Contact us to confirm coverage and schedule your commercial ventilation repair today.
Named one of America's fastest-growing and most successful companies.
All technicians hold OSHA 40-hour safety certification for commercial jobsites.
Licensed Registered Mechanical/HVAC Contractor in New York State.
Fill out the form below and a Denair HVAC specialist will respond promptly — typically within the same business day. Describe your ventilation issue and we'll provide a fixed-price estimate with no obligation.
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