Wiegmann Associates has been named one of St. Louis’ Largest Mechanical Contractors by the St. Louis Business Journal.  Wiegmann ranked in the top 10 with 225 employees nationwide.

Wiegmann Associates is national mechanical contractor serving the commercial, industrial and institutional markets, and a national leader in design/build HVAC projects.  Since 1995, Wiegmann has engineered and installed innovative, energy-saving and cost-efficient HVAC solutions and automation controls for clients in a wide range of industries.  Experts in HVAC design/build and value engineering, Wiegmann has built projects up to $35M for clients in 42 states.