CRAC Unit Installation
Expert installation of computer room air conditioning units sized and configured for your server room's exact heat load, ensuring stable temperatures and humidity levels critical to hardware longevity and uptime.
Brooklyn's data centers, server rooms, and IT facilities demand precision cooling that never fails. Denair HVAC delivers specialized computer room air conditioning solutions engineered for 24/7 uptime, tight temperature and humidity control, and compliance with mission-critical standards — protecting your equipment and your operations year-round.
Comprehensive precision cooling solutions designed to protect mission-critical IT infrastructure and ensure uninterrupted operations.
Expert installation of computer room air conditioning units sized and configured for your server room's exact heat load, ensuring stable temperatures and humidity levels critical to hardware longevity and uptime.
Around-the-clock emergency response for cooling failures in server rooms and data centers. Certified technicians typically arrive within 4 hours, restoring climate control before hardware damage or downtime occurs.
Scheduled maintenance programs that keep precision cooling systems performing at peak efficiency, reducing the risk of unexpected failures, extending equipment lifespan, and maintaining compliance with uptime requirements.
Retrofit and modernize aging computer room cooling equipment to meet current energy efficiency standards and redundancy requirements — without the disruption and cost of a full system replacement.
Smart controls and automation solutions that optimize cooling performance in real time, significantly reducing energy costs while maintaining the precise environmental conditions your IT infrastructure requires.
Post-installation airflow testing and balancing with certified reports to confirm your computer room cooling system is delivering consistent, code-compliant performance across all critical zones.
Server rooms and data centers in Brooklyn operate under constant thermal stress — even brief cooling failures can mean costly hardware damage and significant downtime. Denair HVAC specializes in computer room air conditioning systems engineered for zero-tolerance environments, delivering precise temperature and humidity control, redundant configurations, and full NYC code compliance. With over 19 years of commercial HVAC experience and a team of 28 certified technicians, we design, install, and maintain precision cooling solutions that keep your critical operations running without interruption.
See how Brooklyn and NYC businesses rely on Denair HVAC to protect their critical infrastructure.
"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."
"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."
"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..."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"Crew was respectful, fast, and left our place spotless. Five stars."
"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!"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"Impeccable install. You can tell they're pros the moment they walk in."
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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."
"Denair is professional and courteous."
"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 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."
"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."
"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..."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"Crew was respectful, fast, and left our place spotless. Five stars."
"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!"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"Impeccable install. You can tell they're pros the moment they walk in."
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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."
"Denair is professional and courteous."
"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 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."
"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."
"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..."
"These guys are the best. Installed my central air condition. They are quick, thorough and honest! I definitely recommend them."
"Crew was respectful, fast, and left our place spotless. Five stars."
"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!"
"Really great to work with, awesome staff, happy to work with them anytime again in the future! Highly recommend."
"Impeccable install. You can tell they're pros the moment they walk in."
"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."
"Amazing HVAC vendor who is doing multiple accounts for my company."
"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."
"Denair is professional and courteous."
"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!"
Brooklyn facility managers and IT directors choose Denair HVAC for precision, reliability, and a team that understands what's at stake.
Cooling emergencies in Brooklyn server rooms are resolved typically within 4 hours — no waiting days for a manufacturer rep.
28 technicians trained and certified by major HVAC manufacturers, handling precision cooling for mission-critical facilities across Brooklyn and NYC.
All unintended costs are covered at our own expense — no surprise invoices after your computer room installation or repair is complete.
Nationally recognized as one of America's fastest-growing companies, with over 400 projects delivered across the New York metro area.
Experienced specialists dedicated to protecting Brooklyn's critical infrastructure.
Founder & CEO
Dennis founded Denair HVAC in March 2007 after being laid off from a commercial HVAC company where he had worked for seven years — starting with one man and a beat-up used truck in Brooklyn. Over the past 19+ years, he has grown the company into a $2M+ revenue operation recognized by Inc. 5000 as one of America's fastest-growing businesses. With deep expertise across all aspects of commercial HVAC, including mission-critical computer room cooling, Dennis leads the company's strategic vision with a commitment to honesty, affordability, and technical excellence that has earned the trust of clients ranging from data center operators to major NYC commercial properties.
Service Manager
Thomas leads Denair HVAC's service operations across Brooklyn and the greater NYC metro area, with a sharp focus on fast response times and consistent service quality for commercial and mission-critical environments. He coordinates the scheduling and dispatch of certified technicians, manages customer communication, and ensures that every computer room air conditioning service call — whether a planned maintenance visit or a middle-of-the-night emergency — is executed with minimal disruption. Thomas's operational discipline is central to Denair's promise of same-day service, typically within four hours, keeping server rooms and data centers protected regardless of season or time of day.
Application Engineer
Ramil is Denair HVAC's Application Engineer, responsible for designing and engineering precision cooling systems tailored to the specific thermal and humidity demands of each facility. For computer room and data center projects in Brooklyn, Ramil conducts detailed heat load calculations, oversees equipment selection from leading manufacturers, and produces technical plans that meet both NYC building codes and mission-critical uptime requirements. His work ensures that every CRAC unit, redundant cooling configuration, and energy management system is optimized for long-term reliability, efficiency, and compliance — providing facility managers with confidence that their IT infrastructure is properly protected from day one.
Computer room air conditioning (CRAC) is precision cooling engineered specifically for IT environments like server rooms and data centers. Unlike standard HVAC, CRAC systems maintain extremely tight temperature ranges (typically 64–75°F) and humidity levels (45–55% RH), provide consistent airflow directed at heat-generating equipment, and are designed for 24/7 continuous operation with redundancy to prevent any downtime.
Talk to a Denair HVAC specialist for a free assessment tailored to your Brooklyn facility.
Denair HVAC provides computer room air conditioning services throughout Brooklyn and the entire New York metro area.
11 Regions
Service Area
24/7 Response
Emergency Availability
400+ Projects
Projects Delivered
Contact us to confirm coverage and get a free computer room cooling assessment for your facility.
Recognized as one of America's fastest-growing companies.
Full OSHA safety compliance for all job sites.
Licensed Mechanical/HVAC Contractor for NYC commercial work.
Fill out the form below and a Denair HVAC specialist will contact you to discuss your server room or data center cooling requirements, provide a site assessment, and deliver a fixed-price proposal with 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