Grunau Company is a mechanical systems and fire protection contractor headquartered in the greater Milwaukee area who special ... izes in any size commercial or industrial project in a variety of industries. The majority of our work is completed throughout southeastern Wisconsin as far west as Madison and as far north as Green Bay, WI. However, client relationships have taken us all over the United States. Our mechanical systems capabilities include HVAC (heating, ventilation, and air conditioning), plumbing, process piping, electrical, refrigeration, fire protection, and underground site utilities. Our branded Grunau Metals focuses on specialty and structural metals fabrication. Grunau also has fire protection offices in Indianapolis, IN; Youngstown, OH (Boardman); Pittsburgh, PA (Moon Township) and Orlando, FL. read more