• Princeton University Neuroscience Building

    D&B Engineering designed a solution that was able to meet very strict fan efficiency and sound requirements in this state-of-the-art building. D&B designed and configured units incorporating all of the university's sound, performance, and laboratory requirements. These units include exceptionally efficient multiple fan arrays, 4" perforated sound walls, integral and bypass steam coils, energy recovery wheels, energy recovery coils, and double-jacketed humidifiers.View More

  • Colgate Palmolive

    D&B provided magnetic-bearing water-cooled chillers, condenser water pumps, and variable frequency drives to replace Colgate-Palmolive’s outdated, energy consuming HVAC equipment. Colgate-Palmolive’s annual energy savings totaled $283,898 and D&B assisted them in receiving a $224,526 incentive from New Jersey’s Clean Energy Program.View More

  • Immaculate Heart Academy

    Immaculate Heart Academy is a prominent all girls private school in Washington Township, NJ.

    The boiler plant in the school dated back to the 1950’s with one of the boilers completely inoperable thereby leaving the school limping along on the remaining boiler which had no back-up. This condition persisted through the 2011 -2012 winter season
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  • Mack Cali

    D&B Engineering provided replacement equipment that met the very tight roof space restrictions. We were able to utilize McQuay Skyline “variable aspect ratio” rooftop units with custom duct opening to fit and eliminate the need for costly adapter curbs, roof steel, or duct transitions.
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  • Exchange Place

    D&B Engineering supplied energy-efficient Daikin HVAC equipment into multiple floors in the prestigious, 30-floor structure that is 10 Exchange Place, in Jersey City, New Jersey. Dakin Self-Contained Air Conditioning units were chosen for their design flexibility, durable construction, and quiet operation, as well as low installation and operating costs.
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About Us

About Us

Our History

D&B Engineering was established in 1971 as a manufacturers’ representative selling McQuay-HVAC products in the Northern New Jersey area. Today, D&B represents more than 15 different world class manufacturers of energy-efficient HVAC and cogeneration equipment. With several sales engineers supported by inside application engineers and support staff, D&B provides an unparalleled level of customer support to architects, consulting engineers, building owners, general and mechanical contractors, and facility maintenance teams. In 1986, D&B Parts Corporation was created and it is a wholly owned subsidiary of D&B Engineering.  D&B Parts provides our valued customers easy access to high quality HVAC replacement parts such as compressors, motors, filters and PTAC replacement chassis’ just to name a few examples.

Our Approach

When you work with D&B, remain confident our engineers work with you through every stage of your project. We’re here from the initial design phase to the post-sale warranty. D&B achieves this high quality of service by teaming up with professionals at every stage. We work directly with owners and consulting engineers in the design of HVAC systems for institutional, commercial and industrial applications. Our technical capabilities and knowledge of applications gives you the informational resources and technical insight you deserve. We also partner with mechanical and general contractors to provide equipment delivered on time, within budget. During the manufacturing process, we communicate directly with the factory. It lets us keep an eye on any schedule changes to coordinate deliveries. We then offer startup and warranty services where applicable.


D&B is a proud member of the United States Green Building Council. We are Executive Board members of the New Jersey Sustainable Business Alliance.  D&B remains on the leading edge of LEED™ (Leadership in Energy and Environmental Design) certified building design. We are IBC 2000 certified. Other memberships include Ashrae, The New Jersey Society of Energy Engineers, The Hospital Engineering Society of Greater New York and The Health Facilities Management Society of New Jersey.

Our Mission

At D&B, our business philosophy is to work together as a team, not just with ourselves, but with our customers. We develop strong relationships, teaming with the architect, engineer, construction manager, general and mechanical contractors, as well as sub-vendors. The result is a successfully completed project for the end user, the building owner. As a manufacturers’ representative we are known for being responsive, experienced, technically competent, dependable and honest.

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