Founded in 1881 in Chicago by Isadora and Benjamin Weil, Weil-McLain was originally named Weil Brothers.
In 1918, after acquiring a main supplier, J.H. McLain Company, the company was renamed Weil-McLain and boiler plant operations moved to Michigan City, Indiana.
Throughout the 20th century, Weil-McLain grew to be the largest U.S. manufacturer of cast iron boilers and a leader in the hydronic industry.
In 1999, Weil-McLain expanded its boiler line and entered the oil furnace market by acquiring Williamson Thermoflo.
In 2005, after outgrowing the original Michigan City manufacturing facility, Weil-McLain opened a manufacturing plant and customer training facility in Eden, North Carolina. The company’s headquarters and foundry operations remain in Michigan City.
In 2006, Weil-McLain acquired Taishan Maeda Boiler Co. in Tai’an, China, which manufactures and markets boilers and related parts for the Chinese market.
Today, Weil-McLain maintains its status as a leader in hydronic heating and has a global presence with approximately 700 employees around the world.