Makeup Air Unit Diagnostics
Thorough inspection and diagnostic assessment of your commercial kitchen makeup air system, identifying failed components, airflow imbalances, and performance issues before they escalate into costly shutdowns.
NYC's commercial kitchens run hard — and when your makeup air unit fails, heat buildup, hood imbalance, and code violations follow fast. Denair HVAC's certified technicians diagnose and restore makeup air systems across all five boroughs, keeping your kitchen compliant, your staff comfortable, and your operation running without a costly shutdown.
Comprehensive makeup air unit repair and maintenance solutions for NYC commercial kitchens, restaurants, and food service facilities.
Thorough inspection and diagnostic assessment of your commercial kitchen makeup air system, identifying failed components, airflow imbalances, and performance issues before they escalate into costly shutdowns.
Expert repair and replacement of supply fans, motors, belts, and bearings within makeup air units, restoring proper airflow and ensuring your kitchen hood operates at the correct negative pressure balance.
Troubleshooting and repair of makeup air unit control boards, thermostats, variable frequency drives, and automation interfaces to restore accurate temperature regulation and demand-controlled ventilation.
Inspection, cleaning, and repair of heat exchanger components within direct-fired and indirect-fired makeup air units, maximizing energy efficiency and maintaining safe combustion performance.
Scheduled maintenance programs that keep your makeup air unit running efficiently year-round, including filter changes, coil cleaning, belt inspections, and airflow verification to prevent unexpected failures.
Around-the-clock emergency makeup air unit repair for NYC commercial kitchens. Certified technicians typically arrive within 4 hours to minimize downtime, health code risks, and operational disruption.
Contact our team and we dispatch a certified technician to your NYC location — typically within 4 hours for emergencies. We assess site access, unit location (rooftop or inline), and kitchen layout before beginning any work.
See how Denair HVAC has kept commercial kitchens across New York City compliant and operational.
"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 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."
"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!"
"Amazing HVAC vendor who is doing multiple accounts for my company."
"Crew was respectful, fast, and left our place spotless. Five stars."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely 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!"
"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"
"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"
"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 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."
"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!"
"Amazing HVAC vendor who is doing multiple accounts for my company."
"Crew was respectful, fast, and left our place spotless. Five stars."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely 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!"
"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"
"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"
"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 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."
"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!"
"Amazing HVAC vendor who is doing multiple accounts for my company."
"Crew was respectful, fast, and left our place spotless. Five stars."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely 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!"
"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"
"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"
NYC restaurant and facility operators trust Denair HVAC for makeup air unit repairs that are fast, code-compliant, and priced fairly.
We typically arrive within 4 hours for NYC emergency makeup air repairs, minimizing kitchen downtime.
OSHA-certified and manufacturer-trained team ensures every repair meets NYC DOB and ASHRAE ventilation code standards.
Transparent, fixed-price proposals before work starts — all unintended costs are covered at our expense, no surprises.
Since 2007, Denair HVAC has served commercial kitchens across all five boroughs and the greater New York metro area.
Experienced professionals committed to keeping NYC kitchens running safely.
Founder & CEO
Dennis founded Denair HVAC in March 2007 — starting with one man and a beat-up used truck in Brooklyn. With over 17 years of hands-on experience in the HVAC industry, he brings deep expertise across every aspect of the business, from commercial kitchen ventilation systems to large-scale mechanical projects. Under his strategic leadership, Denair grew from a solo operation to a $2M+ revenue company recognized by Inc. 5000 as one of America's fastest-growing businesses. Dennis's commitment to transparent pricing, quality craftsmanship, and meeting every client's needs has made Denair NYC's go-to commercial HVAC contractor.
Service Manager
Thomas leads Denair HVAC's service operations across New York City, ensuring that commercial kitchen makeup air unit repairs and all HVAC service calls are handled with speed, precision, and consistency. He oversees technician dispatch, scheduling, and direct customer communication — coordinating the team so that emergency calls receive a response typically within 4 hours. Thomas's focus on reducing downtime and maintaining service quality means NYC restaurant operators and facility managers can count on a smooth, reliable repair experience from the first call through final sign-off.
Application Engineer
Ramil provides the technical backbone behind Denair HVAC's commercial kitchen makeup air unit repair and design work. He specializes in HVAC system design tailored to each building's specific performance and efficiency requirements — a critical skill in New York City's diverse mix of high-rise restaurants, ground-floor commercial kitchens, and multi-tenant food service facilities. Ramil oversees equipment selection, technical planning, and application support to ensure every repaired or replaced makeup air unit delivers lasting reliability, energy savings, and full compliance with NYC and ASHRAE ventilation codes.
In NYC, commercial kitchen makeup air system installation typically ranges from $5,000 to $30,000+, depending on unit capacity (tonnage), fuel type (direct-fired, indirect-fired, or electric), ductwork complexity, and rooftop versus inline placement. Denair HVAC provides fixed-price proposals with value engineering to help reduce costs — clients have saved up to 35% compared to standard bids.
Speak with a certified NYC HVAC technician for a free consultation and honest answers.
Denair HVAC repairs commercial kitchen makeup air units across New York City and the greater metro area.
11 Regions
Service Area
Within 4 Hours
Emergency Response
4.7★ Rated
Customer Rating
Contact us to confirm coverage and schedule a same-day diagnostic visit.
Named one of America's fastest-growing companies in 2019.
All technicians hold OSHA 40-hour safety certification.
Fully licensed Mechanical/HVAC contractor registered in New York.
Fill out the form below and a Denair HVAC specialist will respond promptly to schedule your diagnostic visit, confirm service area coverage, and provide a transparent, fixed-price repair estimate — no obligation required.
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