Denair HVAC Company Installs and Maintains Commercial Heating Ventilation and Air Conditioning Systems Servicing Greater New York City

Organized to help GC's win more projects with competitive pricing
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Non-Union Labor   ∙   Private and Public   ∙   Prevailing Wage
Shop Drawings
Value Engineering
Air Handlers
Crane / Rigging
Black Iron
Chilled Water
Condenser Water
Testing and Balancing
As-Build Drawing

DENAIR guaranties fully accurate scope proposals

Thanks to our in house experienced estimators

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Save up to 35% of your HVAC Budgeting


We strive to optimize every project Finding a piece of equipment equal in performance but lower in price.


Dedicated Estimator to every bid Providing scope breakdowns, Alternates and Revisions.


Identify key points for saving on projects with limited time and budget.

An Adequate and Skilled Workforce available on-demand
for Short and Long-term projects.


Performs any size job from $10,000 to $5,000,000


In House Training Facility

A team of 28 trained and certified installers and service technicians

An extensive network of vetted subcontractors

Denair HVAC serves all areas throughout the
greater New York City area 24/7
With a team of experienced Service Technicians
Free Preventatince Maintenance for up to 18 months on all new installations
Up to 10 years manufacturer's warranty for new equipment and parts.

Full project support from start to finish

Committed to accommodating challenging work Schedule

Jobsite Meetings
Project Planning
Coordination with parties
Expediting options
Close-Out documents


Fast Paperwork Turn-Around
Accurate submittals for approval
Detailed shop drawings for coordination

Field Supervision and Dual Quality Control

Denair HVAC has 6 specialty departments, each responsible for its area of expertise:
Equipment installation
Ductwork Installation
Piping Installation
Control systems and BMS
Preventative maintenance

Crew Production Management
Skilled Tradesmen


Every field technician Trained and Certified
OSHA 40 hours and Scaffolding
The safety is our greatest responsibility. We develop comprehensive safety plans prioritized by every team member, from the CEO to the safety officer to those in the field.

Try us out today, starting with a small or large job

We are here to earn your trust

DENAIR's pre-qualification will be sent to your email
Please attach drawings to this form along with other project documentation

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visit one of our completed or in process Projects

We work in all areas of New York City. Tell us about
your objectives, and we will arrange a site visit to a
project that resembles your objectives

A manager will contact you to arrange a time

Fully insured in accordance with industry requirements

Commercial General Liability
Each Occurrence $2,000,000
General Aggregate $4,000,000
Workers Compensation
Experience Modification
Rate (EMR) 0.83
Umbrella Liability
Automobile Liability
Bonding Capacity
Up to $10,000,000
Per project $2,500,000

Looking for more details about the company?

Get a pre-qualification questionnaire Info and presentation

Been in business for over 19 years

80% of the work has been completed early, and 20% on time, never after

One of the principles of our work is transparency across the board. You’ll see this from the beginning of your relationship with Denair – we make highly detailed estimates, which include everything up to the cent, and we explain to you each item.

You have our guarantee that in the course of the project the price will not change even a dollar.

We will become a reliable partner for you. Let’s discuss the next opportunity – we will prepare the detailed proposal and explain how you can improve the budget.

Contact us today and ask about how our regular customers
benefit from the company's loyalty program


  • 1. Why my system consumes more and more refrigerant each year?

    An air-conditioner system that needs recharge of refrigerant on a regular basis is leaking and requires fix. Leaking refrigerant causes your unit to lose cooling capacity and also use additional energy; it’s also hazardous for the environment. Refrigerant and gases released into environment are among the worst culprits in depleting the ozone coating. Denair possesses the latest modern technology to discover and fix refrigerant leaks, since the old methods are costly and time consuming.

  • 2. Why some areas in the premise are too hot and others are too cool?

    There is a variety of possible causes for climate changes in the area. Probably the most common is lack of sufficient air flow to your system. This can happen when you have holes and crack in ducts, closed off or blocked vent, or clogged filters. It’s also possible that some elements of your system may be outdated, and easy modifications may improve the air flow. Another reason might be if space layout has changed without updating air conditioning equipment as well as duct layout, it may be time for a system re-design. Another typical cause of temperature variance is insufficient maintenance. Having your system periodically looked over and tuned up makes it run a lot more effectively.

  • 3. Can’t I get my servicing personnel perform the cleaning?

    In some cases you can, especially if the equipment is under heavy load. However, we recommend at least twice a year to have professional technician clean and maintain your system. We use special professional cleansers. Moreover, some of you system components are dangerous for untrained stuff, such as fan blades, for example. Certified HVAC technician will also check electrical connections, refrigerant charge, inspect the entire system for worn components and any signs of upcoming stress.

  • 4. Why do I need to change the filters?

    Regular filter change will help your heating and cooling system operate at peak level and improve indoor air quality. It is important to replace filters regularly to guarantee appropriate air-flow and to maintain your home free from dust, allergens and germs. Based on the type of filter you have, you might require every week or monthly filter change. Denair can carry out inspection and suggest the most suitable filters and schedule of replacement.

  • 5. Is it important to choose the right size of HVAC system?

    Two main reasons why the size of HVAC system matters are comfort and energy use. Over-capacity equipment will not be as energy efficient as appropriately matched capacity. In turn, under-sized system will definitely lead to loss of comfort and temperature extremes.

  • 6. What size HVAC system do I need?

    The basic rule is that 1 ton of air conditioning can cool from 300 to 800 square feet, but it also depends on the construction and layout of the premise. Therefore, the only right way to estimate the size needed is to have licensed technician, who will evaluate individual heating and cooling needs.

  • 7. How do I know that my A/C unit is big enough?

    The main features of the AC system that you should take into account are performance and efficiency. Before making a decision, you may want to invite professional who will determine the proper size and make recommendation on equipment required.

  • 8. How important is to have quite heating and cooling system?

    It is extremely important as continuing exposure to sound levels of 90-95 decibels may result on hearing loss.

  • 9. What is HVAC?

    HVAC stands for Heating, Ventilation and Air Conditioning, usually used in relation to the entire heating and cooling system that consists of ductworks, air filters, humidification controls, etc.

  • 10. Why my duct pop when AC system starts or stops?

    This disruption is a sign of under-sized duct design. Most probably, air flow is much greater than the ductwork can manage. We suggest you to invite qualified specialist who will recommend adjustments as improper design may lead to ventilation and air quality issues.

  • 11. Can indoor air be harmful to health?

    Yes, definitely! Many household items contribute to poor air quality, for example, compound found in carpets, furniture, cleaning agents, paint and personal care products.

  • 12. What are the benefits of humidifier?

    Proper level of humidity is beneficial to your respiratory system. During heating season, people are confined inside with very dry air for several months. Humidifiers distribute moisture into the air making harsh dry air much easier to breathe. There are room humidifiers available in stores, however whole-house humidifiers are also an option to consider.

  • 13. What are the effect of carbon monoxide?

    Carbon monoxide attached to red blood cells and displaces oxygen. It gets carried to the vital organs through the bloodstream. Without oxygen our organs start asphyxiate and suffocate.

  • 14. What are the symptoms of carbon monoxide poisoning?

    Some of the symptoms are being overlooked as they seem to be flu-like. Mild exposure most often causes headaches and fatigue. Medium exposure may cause severe headaches, disorientation, confusion and accelerated heart rate. Extreme exposure can even cause unconsciousness and coma.

  • 15. What can be done to protect my house from carbon monoxide?

    Prevention is the most essential thing you should take care of. You have to check all combustion appliances on regular basis to ensure that these appliance are operating as designed. Schedule annual maintenance with qualified technician and make sure you house is safe.

  • 16. What is Indoor Air Quality (IAQ)?

    IAQ is the level of air pollution that exists inside your house. Indoor, the exposure to the pollutants, can be up to 100 time higher than outdoors. It is estimated that 90% of their time, people spend indoors and air pollution has become an issue for their health, especially for those suffering from allergies and respiratory issues.

  • 17. Is there a way to reduce energy consumption of my HVAC system?

    HVAC equipment consumes more energy than any other appliance at home, but there are ways to control energy costs and reduce consumption. First of all, you should schedule annual maintenance of your equipment to make sure it is running properly and efficiently. Secondly, if you are looking to purchase new equipment you may want to consider high-efficiency system, which is designed to help you to reduce energy costs and conserve natural resources. When shopping for new home comfort system, pay attention to SEER and AFUE ratings. The higher the rating, the higher the efficiency. Also, zoning system may significantly reduce your costs as having the zoning system you no longer will have to heat or cool the premises of you house which are rarely used or not occupied. Finally, programmable thermostats are able to deliver comfort, efficiency and savings on energy. For instance, if you are away you can set the thermostat on economy regime.

  • 18. My utility bill is too high! Can new air conditioner help to lower the bills?

    Yes! New 12 SEER air conditioner can cut in half the consumption of an old air conditioner!

  • 19. What is SEER?

    SEER stands for Seasonal Energy Efficiency Rating – the higher SEER the lower energy consumption.

  • 20. Should I buy air conditioner with the highest SEER?

    Initially, you pay more for 12 SEER air conditioner than 10 SEER, but the saving on electricity bills will normally pay for the difference within 3-5 years. 10 SEER is considered standard efficiency, 12 SEER is high efficiency, 14 SEER are also available but are very rare installed.

  • 21. Should I run blower at all times?

    You may try to run blower or to put your air conditioner on ‘auto’ mode. However, running blower at all times will result in more comfort, more even temperature throughout the house and cleaner air as it is being filtered more. Although, it will consume a bit more electricity. Your choice…

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