RTU Installation
Turnkey commercial rooftop unit installation managed by 28 certified technicians. Handles equipment, ductwork, controls, and commissioning for Manhattan buildings of any size, from $10,000 to $5,000,000 in scope.
Navigating NYC DOB permit requirements for commercial rooftop unit installations in Manhattan is complex — dense zoning codes, strict filing deadlines, and borough-specific inspections can stall your project. Denair HVAC handles the full permit process alongside expert RTU installation, keeping your Manhattan commercial property compliant, on schedule, and within budget.
End-to-end RTU installation and permitting solutions tailored to Manhattan's commercial buildings and NYC DOB requirements.
Turnkey commercial rooftop unit installation managed by 28 certified technicians. Handles equipment, ductwork, controls, and commissioning for Manhattan buildings of any size, from $10,000 to $5,000,000 in scope.
Expert preparation and submission of NYC Department of Buildings mechanical permits for RTU installations. Fast paperwork turnaround with accurate submittals, shop drawings, and expediting options to meet Manhattan project timelines.
HVAC system design, shop drawings, and value engineering optimized for Manhattan commercial properties. Identifies cost-saving alternatives while meeting NYC energy codes and LL97 compliance mandates.
Full project support from permit application through final inspection. Includes jobsite coordination, scheduling, close-out documents, and dual quality control — ensuring your Manhattan RTU project is delivered on time.
Certified air testing and balancing reports upon completion of RTU installations. Ensures systems operate at peak performance and meet NYC DOB inspection requirements before final sign-off.
Guides Manhattan building owners through NYC Local Law 97 sustainability mandates during RTU installation, selecting energy-efficient equipment that reduces carbon penalties and long-term operating costs.
Our engineers conduct a thorough site assessment of your Manhattan commercial building — evaluating rooftop load capacity, existing ductwork, and mechanical room access. We define a precise project scope and identify value-engineering opportunities before any paperwork is filed.
See how Denair HVAC has delivered compliant RTU installations for commercial properties across Manhattan and NYC.
"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."
"Impeccable install. You can tell they're pros the moment they walk in."
"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."
"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."
"Crew was respectful, fast, and left our place spotless. Five stars."
"excellent work and quality"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"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."
"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 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 professional and courteous."
"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."
"Impeccable install. You can tell they're pros the moment they walk in."
"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."
"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."
"Crew was respectful, fast, and left our place spotless. Five stars."
"excellent work and quality"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"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."
"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 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 professional and courteous."
"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."
"Impeccable install. You can tell they're pros the moment they walk in."
"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."
"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."
"Crew was respectful, fast, and left our place spotless. Five stars."
"excellent work and quality"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"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."
"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 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 professional and courteous."
From the first permit filing to final DOB inspection, Denair HVAC brings 19+ years of NYC commercial HVAC expertise to every rooftop project.
Registered NYC mechanical contractor with fast DOB paperwork turnaround, minimizing permit delays for Manhattan projects.
Clients save up to 35% on RTU installation budgets through alternative approved equipment — critical for Manhattan's high construction costs.
Inc. 5000 recognized company with 400+ completed projects and $76M in project bids across New York City commercial properties.
All unintended project costs covered at our own expense — protecting building owners and managers from budget overruns on Manhattan RTU jobs.
Experienced professionals managing every aspect of your RTU permit and installation.
Founder & CEO
Dennis founded Denair HVAC in March 2007 — starting with one man and a beat-up used truck — and grew the company to over $2 million in annual revenue within five years. With over 17 years of hands-on HVAC industry experience, Dennis leads Denair's strategic vision across all commercial and residential divisions. Under his leadership, Denair was recognized by Inc. 5000 as one of America's fastest-growing companies and has completed over 400 projects across Manhattan, Brooklyn, Queens, and the broader NYC metro area. Dennis's deep expertise spans commercial RTU installations, permit management, and value-engineered mechanical contracting for buildings of every scale.
Lead Estimator
Farrukh has been a cornerstone of Denair HVAC since 2010, bringing deep expertise in commercial bid preparation and project scoping to every RTU permit and installation proposal. As Lead Estimator, he is responsible for comprehensive bid proposal preparation, tracking opportunities with vendors, subcontractors, and customers across Manhattan and the greater NYC area. Farrukh's meticulous approach to scope breakdowns, alternates, and revisions ensures that every commercial RTU project — from initial permit budgeting to final closeout — is accurately estimated and competitively priced. His work directly supports Denair's ability to deliver savings of up to 35% through value engineering.
Application Engineer
Ramil designs and supports HVAC systems tailored to each Manhattan commercial building's unique performance and energy efficiency requirements. As Application Engineer at Denair HVAC, he oversees RTU equipment selection, technical planning, NYC code compliance review, and shop drawing preparation for DOB permit submissions. Ramil's engineering expertise ensures every commercial rooftop unit installation is precisely matched to the building's load requirements, compliant with NYC Local Law 97 sustainability mandates, and engineered for long-term reliability and energy savings. His technical oversight is central to Denair's dual quality control process on all commercial projects.
Service Manager
Thomas leads Denair HVAC's service operations division, ensuring fast response times, efficient technician scheduling, and consistent quality control across all commercial RTU installations and service calls in Manhattan and the NYC metro area. He coordinates between field technicians and clients to minimize downtime, manage permit inspection scheduling, and deliver a seamless project experience from mobilization through final sign-off. Thomas's operational oversight is a key reason why 80% of Denair's projects are completed ahead of schedule, protecting clients from the costly delays that frequently impact commercial HVAC projects in Manhattan's demanding construction environment.
The NYC Department of Buildings issues a range of permits including mechanical permits for HVAC equipment like commercial RTUs, electrical permits, plumbing permits, and building alteration permits. For commercial RTU installations, a mechanical work permit (Alt-2 or Alt-3 filing depending on scope) is typically required, along with equipment approval documentation and, in many cases, a licensed professional engineer's sign-off.
Speak with a Denair HVAC expert for a free consultation on your commercial RTU project.
Denair HVAC serves commercial properties across Manhattan and the entire NYC metro area with licensed RTU installation and permit services.
11 Regions
Service Area
19+ Years
In Business
4.7★ Rated
Google Rating
Contact us to confirm coverage and get a free RTU permit project estimate.
Recognized as one of America's fastest-growing companies.
Full team trained and certified to OSHA 40-hour standards.
Licensed to file NYC DOB permits for all commercial HVAC work.
Fill out the form below and a Denair HVAC project specialist will respond promptly to discuss your commercial RTU installation, permit requirements, and a no-obligation cost estimate tailored to your Manhattan building.
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