Having built or repaired over 300 of the 500 American Multiple Hearth Furnaces (MHFs) in existence, our experience has kept us aware of the issues and concerns of multiple hearth furnace owners and operators. We have constructed and rehabilitated Multi Hearth Furnaces in 47 American States (including Alaska), Puerto Rico, Canada, Europe, Asia and South America. As a result, we have seen numerous failure mechanisms and have brought long term solutions to these problems. View some of our more notable multiple hearth furnace projects.