Serving Suffolk and Nassau Counties, NY

Diamond Comfort Systems Corp - Logo

Commercial HVAC Company in Nassau County, NY

1-Year Warranty on New Equipment

Quick Response Times

24/7 Service for Contract Customers

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Commercial HVAC Systems Excellence From Diamond Comfort Systems Corp

Diamond Comfort Systems Corp, a family-owned HVAC contractor, has been serving New York's Suffolk and Nassau counties since 2000. With over 60 years of combined experience, our team of knowledgeable and qualified technicians is committed to providing personalized service with integrity. In addition to standard HVAC services, our tech's are trained to service specialty equipment found in Pharmaceuticals, Testing Labs, Hospitals, Clean Rooms and the Manufacturing Industries. Diamond Comfort Systems Corp. is routinely call upon and trusted by many manufacturers to diagnose and repair issues ranging from faulty installations and manufacture defects.  We pride ourselves on our quick response times and our ability to routinely perform same-day service.


We also offer a 1-year warranty parts and labor on all new equipment. Our technicians are trained in specialty equipment and Spanish-speaking technicians are available. Our commercial HVAC company in Suffolk County, NY provides same-day estimates or estimates within 24 hours to help you make informed decisions about your HVAC needs. Call us today to schedule your commercial HVAC service!

Why Choose Diamond Comfort Systems?

As a locally and family-owned business, we understand the importance of a comfortable environment and a well maintained facility. Which is why we are not just another HVAC contractor; but a trusted partner in maintaining the comfort and safety of your facilities. Ask about our 1-year parts and labor warranty on new equipment. Get a same-day or 24-hour estimate. We are members of the United Service Workers Union Local 355. That's why we're the go-to commercial HVAC company in Nassau County, NY!

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Over 60 years of combined experience

Quick response time

1-Year Warranty on New Equipment

Local and family-owned

Knowledgeable and qualified techs

Personal service

Air Conditioning and Heating Package Units

Diamond Comfort Systems Corp offers a comprehensive air conditioning and heating service program to ensure your HVAC systems are running efficiently and effectively. Keeping your space comfortable year-round.

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Hydronic Heating and Cooling systems

Trust our company to properly service and maintain your boiler and chiller systems. Diamond Comfort Systems Corp is a proud service agent of Thermal Care Chillers.

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Humidifiers and Dehumidifiers

Diamond Comfort Systems Corp services, installs and maintains all types of commercial and industrial Humidification and Dehumidification systems. Including Nortec, Condair, Carel, Aprilaire, Munters and Humiditrol Rooftops.

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Split and Mini Split Systems

Diamond Comfort Systems maintains and installs all types of split systems. Including Panasonic, Mitsubishi, Dakin/McQuay, Fujitsu and other major manufacturers.

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Make-Up Air and Ventilation units

Diamond Comfort Systems Corp has extensive knowledge on all major manufacturers of make up air and ventilation systems. Weather-Rite, Reznor, Aaon, Valient/Greenheck. We are proud to be a preferred service agent Cambridge Engineering and Modine.

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Specialty Equipment

Our company provides expert service for Cooling Towers, Baltimore Air Coil, Marley, Barron Blakeslee Degreasers, Thermal Care and Vertiv/Leibert.

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Building Automation and Controls

Although most Building Automation Systems are proprietary. Diamond Comfort Systems has become the first line of defense for many of our customers, when it comes to diagnosing and repairing control issues. Saving on costly service from the proprietary Maunufacturers.

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Service and Maintenance Contracts

Extend the life of your equipment, reduce down time and costly repairs with our comprehensive service and maintenance agreements. 24/7 Emergency Service is  available for our contract customers.

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Here's what our satisfied customers are saying...

At Diamond Comfort Systems Corp, we take pride in providing exceptional commercial HVAC services to our customers. We would be grateful if you could share your thoughts about our business with others. Your feedback helps us improve and helps others make informed decisions. Please take a moment to leave a review of Diamond Comfort Systems Corp and let others know what you think.

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Diamond Comfort Systems Corp

Serving the Suffolk and Nassau County, NY areas, Diamond Comfort Systems specializes in commercial HVAC, humidifiers, and ventilation. Personal service. Integrity. 24/7 service for contract customers. Call us.

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