Established in 1985 D&G Mechanical, INC. is a Heating & Cooling Company that operates throughout the Greater Pittsburgh area, ... Ohio, New Jersey, Michigan, Maryland, Virginia and North Carolina. Whether it's residential, commercial or industrial, no job is too big or small for us. Here At D&G Mechanical, Inc. we provide sales and services to Commercial, Residential and Industrial customers. We are trusted by your neighbor, as well as some of the largest corporations in the world. read more