Weil-McLain is America's number one manufacturer of boilers for over 115 years. Cast iron boilers for hot water or steam are used for every job from homes to apartments to large commercial, industrial, and institutional buildings. Weil-McLain equipment is used for all fuels, new buildings, retrofits or replacements. They are available in individual sections, assembled sections, or completely packaged and fire-tested. Weil-McLain is dedicated to being a Global Leader in space conditioning and the water heating industry.