About PDM Group

PDM Group has a proud company history dating back to 1935. One of our Founding Companies, Hearnen Air Conditioning was one of nine original Factory Distributorships set up by Willis Haviland Carrier, an American engineer, best known for inventing modern air conditioning. Carrier invented the first electrical air conditioning unit in 1902. We have grown in to a leading Industrial and Commercial Air Conditioning Heating and Ventilating Service Provider. Our business was founded on responding quickly to our customer’s needs, delivering good quality service at a reasonable price and producing a positive result for our customers. We now have two offices with fully staffed Service Departments. Our main office is located in Cranbury, NJ covering nyc and the surrounding area. Our Annapolis, Maryland Office covers Metro Washington, DC and Northern Virginia. Our Engineering and Installation Department specializes in Design Build Applications from the simplest to the most complex including air conditioning, heating, piping and process systems guaranteed to meet your specifications.

PDM Group provides, installs and services all major brands of HVAC Equipment including Process and Comfort Chillers. Process Chillers, and Cooling Towers for the Plastics Industry and specialty equipment such as Desiccant Dehumidifiers for the Food, Pharmaceutical and Process Industries as well as Humidification Systems and Data Center Cooling Equipment. We also specialize in the design and installation of Direct Digital and Pneumatic Control systems, including Building Automation.
We set high standards for all our employees and sub-contractors. Their attitudes and skills are expected to reflect our company’s commitment to exceed your expectations in everything we do.


PDM Group is comprised of a Management Team with over 75 Years of experience in the Industrial, Commercial Heating, Air Conditioning and Piping fields.