Grunau History

1920

Paul J. Grunau establishes Grunau Company for plumbing and repair services
1923

Grunau Company adds heating system installation to offered services
1929

Grunau Company adds fire protection systems to its capabilities
1929

Paul E. Grunau joins Grunau Company to help manage the business
1960

Grunau Company adds sheet metal services
1962

Gary Grunau joins Grunau Company as 3rd generation of family leadership
1967

Grunau Company expands to Indianapolis, IN
1977

Grunau Company adds specialty metals to its capabilities
1980

Grunau Company expands to Pittsburgh, PA
1982

Grunau Company expands to Orlando, FL
1990

Paul W. Grunau joins Grunau Company marking the 4th generation of family leadership
1994

Grunau Company expands to Youngstown, OH
1999

Grunau Company brands its specialty metals division as Grunau Metals
2003

Grunau embraces the Lean Construction culture
2005

Grunau is first Wisconsin mechanical contractor to have LEED Accredited Professionals on staff
2006

Grunau Company is acquired by APi Group, a family of specialty contractors
2007

Grunau Company expands to Ft Myers, FL
2009

Larry Loomis becomes President of Grunau Company

Click the years above or scroll to read Grunau's history.

I would like to extend a 'huge' thank you to the Grunau team for the effort that took place in fixing the water main break at our corporate headquarters. The team performed admirably and demonstrated your company's dedication to exceeding its customers' expectations. Please pass on my sincere thanks for a job well done.”

- Ward Komorowski, Director, Facilities and Building Services at Johnson Controls, Inc.