Emergency Fan Repair
Around-the-clock emergency exhaust fan repair for Manhattan businesses. Our certified technicians respond within hours to restore ventilation, prevent code violations, and keep your operations running without costly delays.
Manhattan's dense commercial buildings—from Midtown high-rises to Lower Manhattan restaurants—depend on reliable exhaust ventilation year-round. Denair HVAC's certified technicians diagnose and restore commercial exhaust fans fast, minimizing downtime and keeping your business compliant with NYC building codes. Same-day service available. Get your ventilation system back on track today.
Comprehensive exhaust fan repair and maintenance solutions tailored for Manhattan's commercial buildings, restaurants, and facilities.
Around-the-clock emergency exhaust fan repair for Manhattan businesses. Our certified technicians respond within hours to restore ventilation, prevent code violations, and keep your operations running without costly delays.
Worn or failed fan motors are diagnosed and replaced with manufacturer-approved components. We service all major commercial exhaust fan brands, ensuring restored airflow and extended equipment lifespan for your facility.
Scheduled maintenance plans keep your commercial exhaust fans operating at peak efficiency year-round. We clean, lubricate, inspect, and test all components to prevent unexpected failures and reduce energy costs.
Full-scope HVAC service and repair covering all heating, cooling, and ventilation equipment. Licensed technicians deliver fast diagnostics and lasting repairs for commercial systems of any size across Manhattan.
Air testing and balancing services with certified reports to verify your exhaust system performs at code-required airflow levels. Essential after repairs or upgrades to confirm system integrity and NYC compliance.
Targeted retrofits and system tune-ups to modernize aging exhaust and ventilation equipment. Optimize performance, meet current NYC energy standards, and improve comfort without a full system replacement.
We dispatch a certified technician to your Manhattan location—typically within 4 hours. Whether you're in Midtown, the Financial District, or Harlem, our team arrives fully equipped to begin assessment immediately with no unnecessary delays.
See how Denair HVAC has restored ventilation systems and kept commercial operations running across 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 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 was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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!"
"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"
"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!"
"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."
"Impeccable install. You can tell they're pros the moment they walk in."
"excellent work and quality"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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 was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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!"
"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"
"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!"
"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."
"Impeccable install. You can tell they're pros the moment they walk in."
"excellent work and quality"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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 was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"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!"
"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"
"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!"
"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."
"Impeccable install. You can tell they're pros the moment they walk in."
"excellent work and quality"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
Manhattan businesses count on Denair HVAC for fast, reliable, and code-compliant exhaust fan repair backed by nearly two decades of commercial HVAC expertise.
We respond within 4 hours across Manhattan and all NYC boroughs, minimizing downtime for your business.
Our team holds OSHA 40-hour, scaffolding, and major manufacturer certifications—meeting NYC's strict commercial compliance requirements.
All unintended costs are covered at our expense. You get a transparent estimate before work starts—no surprises.
Founded in Brooklyn and serving Manhattan since 2007, Denair understands the unique demands of New York's commercial buildings.
Experienced professionals dedicated to keeping Manhattan's commercial ventilation systems running.
Founder & CEO
Dennis founded Denair HVAC in March 2007 with a single used truck and a vision to deliver honest, high-quality HVAC service to New York's commercial sector. With over 17 years of hands-on HVAC industry experience, he has grown the company from a one-man operation into a $2 million+ enterprise recognized by Inc. 5000 as one of America's fastest-growing companies. Dennis leads Denair's strategic direction with a focus on transparency, value engineering, and exceeding client expectations on every project—from single exhaust fan repairs in Manhattan to multi-million-dollar commercial HVAC installations across the NYC metro area.
Service Manager
Thomas leads Denair HVAC's service operations with a relentless focus on speed, efficiency, and consistent quality. He coordinates technician dispatch, scheduling, and customer communication to ensure that every commercial exhaust fan repair and HVAC service call in Manhattan and across NYC is handled with minimal disruption. Thomas is the backbone of Denair's same-day service commitment—managing manpower and logistics so that technicians arrive on-site fully prepared and that clients experience a seamless, professional service from first call to final sign-off. His operational discipline keeps Denair's response times among the fastest in New York's commercial HVAC market.
Application Engineer
Ramil brings deep technical expertise to every commercial exhaust and ventilation challenge Denair HVAC encounters across Manhattan's diverse building stock—from pre-war walk-ups to modern commercial towers. He designs and supports HVAC and ventilation systems tailored to each building's specific performance, airflow, and energy efficiency requirements. Ramil oversees equipment selection, technical planning, and application support to ensure that repairs and replacements deliver long-lasting reliability, measurable energy savings, and full compliance with NYC building codes and LL97 sustainability mandates. His engineering insight is a key reason Denair consistently delivers solutions that outperform the competition.
Denair HVAC offers same-day service, typically arriving on-site within 4 hours of your call. Our technicians are dispatched fully equipped to handle urgent exhaust fan failures across all Manhattan neighborhoods—from Midtown office buildings to Lower East Side restaurants—minimizing operational downtime and helping you avoid health code violations.
Speak with our HVAC experts for honest advice and a free estimate tailored to your building.
Denair HVAC serves commercial properties throughout Manhattan and the greater New York metro area, with fast response times.
11 Regions
Service Area
Within 4 Hours
Response Time
4.7★ Rated
Customer Rating
Contact us to confirm coverage and schedule your exhaust fan repair today.
Named one of America's fastest-growing companies by Inc. 5000.
Technicians certified to OSHA 40-hour safety standards.
Licensed Mechanical/HVAC Contractor registered in New York State.
Fill out the form below and a Denair HVAC specialist will contact you promptly to discuss your exhaust fan issue, provide an honest assessment, and schedule service—often the same day.
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