DMG is a manufacturers’ representative for custom engineered, high quality Heating, Ventilating and Air Conditioning (HVAC) equipment.

Since opening in 1967 we have worked closely with consulting engineers, contractors, developers and facility engineers/owners, in the design, selection and purchase of top quality equipment. We have multiple sales offices to serve the greater Los Angeles market, San Diego, Central Valley and Central Coast of California and the state of Hawaii from our office in Honolulu. 

Our staff of engineers and technical support assistants are experienced and ready to be of service in the design and application of Custom and Semi-Custom Air Handlers, Direct and Indirect Evaporative Cooling, Packaged and Split DX, VRF, Chillers, Cooling Towers, Boilers, Pumps, Water Source Heat Pumps, Centrifugal and Axial fans, Air Flow measurement, Variable Frequency Drives, and various other related products.