About Denair HVAC

Denair HVAC is your trusted provider of heating, ventilation, and air conditioning services throughout the greater New York City area.

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Commercial HVAC Service • Construction • Controls • Energy Solutions

A Commercial HVAC Partner Built for NYC Buildings

Denair HVAC was founded in Brooklyn in 2007 with a commitment to providing dependable, accountable HVAC service for New York City buildings. Since then, the company has grown from a one-truck operation into a full-service commercial HVAC contractor serving facility managers, building owners, property managers and businesses throughout the five boroughs.

Our team supports the complete HVAC lifecycle—from system design, installation and complex retrofits to preventive maintenance, automation and controls, energy management and 24/7 emergency repairs. This integrated approach helps clients reduce downtime, improve building comfort, manage energy costs and prepare for evolving requirements such as NYC Local Law 97.

Denair HVAC has been recognized by the Inc. 5000 and continues to grow through long-term client relationships, transparent communication and practical solutions designed for the operational demands of New York City buildings.

Why NYC Building Teams Choose Denair HVAC

NYC building teams need more than an equipment vendor. They need an HVAC partner who understands operational risk, changing energy requirements and the complexity of working in occupied commercial buildings.

OUR MISSION

To help New York City building teams reduce HVAC downtime, protect occupant comfort and make informed decisions through responsive service, clear communication and accountable project delivery.

OUR VISION

To be the long-term commercial HVAC partner NYC facility managers trust for the complete system lifecycle—from design and installation to maintenance, emergency service, energy optimization and Local Law 97 planning.

Fully accredited, for your peace of mind

INSURANCE

We are fully insured NYC HVAC Company in accordance with New York construction industry requirements:

Commercial General Liability
Each Occurrence – $ 2,000,000
General Aggregate – $ 4,000,000
Workers Compensation – $ 1,000,000
Umbrella Liability – $ 5,000,000
Automobile Liability – $ 1,000,000

Meet the Team

Denair’s leadership team coordinates engineering, estimating, service, finance and client support
to deliver accountable HVAC solutions throughout every stage of a building’s system lifecycle.

Dennis Cherniy

Founder & CEO

Dennis founded Denair HVAC Company in 2007. He has over 19 years of experience in HVAC industry and holds significant expertise in all the aspect of the business. Leading company’s strategic vision, he has raised enterprise from zero to the level of 2 million in revenue within 5 years.

Tanya Gurzhi

Financial Manager

15+ years handling finance, budgeting, and forecasting. She handles all aspects of accounting, finance, budgeting, forecasting, and insurances for Denair and we couldn’t be luckier.

Natalja Sirokova

Marketing Manager

Natalja serves as marketing manager at Denair HVAC Company. In this capacity, she oversees the building of relationships with prospective clients and developing the firm’s brand. She is responsible for maintaining public relations and development of marketing strategies.

Farrukh Kasimov

Lead Estimator

Farrukh has been with Denair HVAC Company since 2010. He is an experienced estimator who is responsible for bid proposal preparation in a comprehensive and timely manner, tracking opportunities with vendors, subcontractors and customers.

Anastasiya Chernaya

VP Business Development

Anastasiya serves as sales manager. In this capacity, she is responsible for leading Denair’s new business acquisitions by identifying market opportunities, developing strategic partnerships. Anastasiya is in charge of development and implementation of sales and growth strategies.

Thomas Mishakin

Service Manager

Thomas leads Denair HVAC’s service operations, ensuring fast response times, efficient scheduling, and consistent service quality. He coordinates technicians and customer communication to keep systems running reliably, reduce downtime, and deliver a smooth service experience from start to finish.

Verified Customer Feedback

See what New York building owners, managers and businesses say about working with Denair HVAC. Visit our Google Business Profile for current ratings and verified customer reviews.

Dennis does excellent work; and, when his people are finished with a job, you can eat off the floor in the Mechanical room. His team will be able to address any problem you have with commercial HVAC system.

Willian G. Holy

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.

Amanda Ron

I was able to upgrade my cooling towers through the help of Denair and I did love their Service rendered, Wonderful Experience.

Ken Lucky

Value Focused HVAC Provider

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 inefficient system I had replaced 10 years ago. Denair delivers customer-focused service, valuable recommendations to improve HVAC efficiency, great quality work, all at very competitive prices while ensuring customer satisfaction. Highly recommended!

John Green

Reliable, ethical, professional
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!

Al Neese RAM-ARM

ABOUT DENAIR HVAC

Frequently Asked Questions

Learn how Denair HVAC supports New York City building teams with dependable commercial HVAC service, construction, controls and energy solutions.

When was Denair HVAC founded?

Denair HVAC was founded in Brooklyn in 2007 and serves commercial buildings throughout New York City.

What areas does Denair HVAC serve?

Denair HVAC serves Manhattan, Brooklyn, Queens, The Bronx and Staten Island.

What commercial HVAC services does Denair provide?

Denair provides HVAC design, installation, complex retrofits, preventive maintenance, automation and controls, energy-management solutions, air and water testing and balancing, and 24/7 emergency repairs.

Does Denair HVAC provide 24/7 emergency service?

Yes. Commercial clients can call Denair’s service department at (212) 365-5115 for 24/7 emergency HVAC assistance.

Can Denair help with Local Law 97 and energy efficiency?

Yes. Denair works with NYC building teams to identify HVAC, controls and energy-management improvements that can support building performance and Local Law 97 compliance planning.

Need a commercial HVAC partner for your New York City building?

Contact Denair HVAC Call (212) 776-1333

DenairHVAC.com