Grease Duct Installation
Full installation of UL-listed grease ductwork systems for commercial kitchens. We handle design, fabrication, and installation to meet NFPA 96 and local Long Island fire code requirements from start to finish.
Long Island's commercial kitchens face strict fire codes and demanding ventilation requirements year-round. Denair HVAC delivers expert grease ductwork installation that ensures full code compliance, superior airflow, and lasting protection against grease buildup. From Nassau County restaurants to Suffolk County food service facilities, we bring 19+ years of mechanical expertise to every project.
Comprehensive grease duct solutions for Long Island commercial kitchens, from new installations to retrofits and inspections.
Full installation of UL-listed grease ductwork systems for commercial kitchens. We handle design, fabrication, and installation to meet NFPA 96 and local Long Island fire code requirements from start to finish.
In-shop custom fabrication of stainless steel and black iron grease ducts tailored to your kitchen layout. Simultaneous on-site and shop fabrication accelerates timelines and reduces project costs significantly.
Installation of commercial exhaust hoods, makeup air units, and exhaust fans integrated seamlessly with your grease duct system, ensuring proper capture velocity and code-compliant ventilation performance.
Modernize outdated or non-compliant grease duct systems with targeted retrofits. Ideal for Long Island restaurants undergoing renovations or facing code violations, with minimal disruption to daily kitchen operations.
Scheduled grease duct cleaning and preventive maintenance plans to reduce fire hazards and extend system lifespan. Customized service contracts with free preventative maintenance available on new installations.
Certified air testing and balancing upon installation completion to ensure your grease exhaust system performs at peak efficiency, with full documentation and certified reports provided for inspection purposes.
Our engineers conduct a thorough on-site assessment of your Long Island kitchen, reviewing layout, cooking equipment, and applicable local fire codes including NFPA 96, Nassau County, and NYC-adjacent building requirements to establish a compliant design baseline.
See how Long Island and New York businesses achieved code compliance and safer kitchens with Denair HVAC.
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"Impeccable install. You can tell they're pros the moment they walk in."
"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..."
"Denair is the most dependable HVAC service company in New York!"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"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 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"
"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."
"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."
"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!"
"excellent work and quality"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"Impeccable install. You can tell they're pros the moment they walk in."
"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..."
"Denair is the most dependable HVAC service company in New York!"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"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 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"
"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."
"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."
"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!"
"excellent work and quality"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"I am very pleased with the service and professionalism we receive from all the techs and staff at Denair."
"I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience."
"Impeccable install. You can tell they're pros the moment they walk in."
"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..."
"Denair is the most dependable HVAC service company in New York!"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"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 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"
"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."
"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."
"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!"
"excellent work and quality"
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
Long Island kitchens demand expert-level grease duct work. Here's what sets Denair HVAC apart from every other contractor.
Deep knowledge of NFPA 96, Long Island fire codes, and NYC-adjacent compliance requirements ensures every installation passes inspection.
All unintended costs are covered at our expense. You receive a guaranteed proposal price with no surprise change orders mid-project.
Simultaneous in-shop fabrication and on-site installation cuts project timelines significantly, minimizing downtime for Nassau and Long Island restaurants.
Founded in 2007 and recognized by Inc. 5000, Denair brings battle-tested mechanical expertise to every Long Island commercial kitchen project.
Experienced professionals committed to flawless grease ductwork installation across Long Island.
Founder & CEO
Dennis founded Denair HVAC in 2007 with nothing more than a used truck and a commitment to delivering honest, high-quality mechanical contracting across the New York Metro Area. Over the past 19+ years, he has grown the company from a one-man operation into an Inc. 5000-recognized firm generating $2 million+ in annual revenue. Dennis holds deep expertise across all aspects of commercial HVAC and mechanical contracting, including grease ductwork systems for restaurants and commercial kitchens throughout Long Island, Brooklyn, and the greater New York region. His strategic vision and dedication to value engineering have saved clients hundreds of thousands of dollars while ensuring every project meets the highest code and quality standards.
Lead Estimator
Farrukh has been a cornerstone of the Denair HVAC team since 2010, bringing over 15 years of estimating expertise to every commercial project. As Lead Estimator, he is responsible for preparing comprehensive and timely bid proposals, tracking opportunities with vendors, subcontractors, and customers across Long Island and the New York Metro Area. For grease ductwork installation projects, Farrukh ensures every scope is accurately quantified, alternates are identified, and value engineering opportunities are captured—helping Long Island clients save up to 35% on their total project budgets. His meticulous attention to detail and vendor relationships consistently deliver competitive, transparent pricing.
Application Engineer
Ramil leads the technical design and engineering support for Denair HVAC's mechanical projects, including grease ductwork systems for commercial kitchens across Long Island. He specializes in tailoring HVAC and exhaust solutions to each building's unique performance and efficiency requirements, overseeing equipment selection, shop drawing production, and code-compliant technical planning. For grease duct installations, Ramil ensures every system achieves proper capture velocity, airflow balance, and compliance with NFPA 96 standards and local Long Island fire codes. His engineering oversight is central to Denair's dual quality control process and long-term system reliability.
Service Manager
Thomas manages Denair HVAC's service operations, ensuring every grease ductwork installation and maintenance project across Long Island runs with precision, speed, and quality. He coordinates field technicians, manages scheduling, and maintains clear communication with property managers, restaurant owners, and general contractors throughout Nassau County and the surrounding service area. Thomas's focus on fast response times and efficient crew deployment means minimal disruption to kitchen operations during installation. His leadership ensures that every project adheres to Denair's standard of completing 80% of work ahead of schedule, never after the agreed deadline.
A grease duct is a specialized exhaust pathway that captures and removes grease-laden vapors, smoke, and heat produced by commercial cooking equipment. Air is drawn through an exhaust hood above the cooking surface, travels through the grease duct—which is constructed of heavy-gauge steel to contain any grease fires—and is expelled outside the building by a rooftop exhaust fan. The system must be designed per NFPA 96 to prevent grease accumulation and reduce fire risk.
Talk to our Long Island HVAC specialists for a free consultation and project estimate.
Denair HVAC provides expert grease ductwork installation across Long Island and the greater New York Metro Area.
10+ Counties
Service Area
24/7 Emergency
Availability
400+ Projects
Projects Completed
Contact us today to confirm coverage and get a free grease ductwork installation estimate.
Recognized as one of America's fastest-growing companies.
Full OSHA 40-hour safety certification for all field technicians.
Licensed Mechanical/HVAC contractor serving New York and Long Island.
Fill out the form below and a Denair HVAC specialist will reach out within one business day to discuss your project scope, timeline, and budget. Fixed pricing guaranteed—no surprise costs.
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