North America’s Leading Boiler Manufacturer Advances Renewable Energy with Cleaner, Greener Heating Solutions Paving the way for a more climate conscious future, hydronic comfort heating solutions leader Weil-McLain® has announced that its Ultra Oil, WGO, WTGO, and SGO residential oil boilers are now certified for use with biofuel blends up to 20% (B20). This achievement has been made possible through collaboration Read more