The Rotary Preheater (RPH) is a new innovation in glass furnace heat recovery technology, designed to transfer waste heat from furnace exhaust gasses to mixed batch and cullet within a rotating kiln. This advanced design enables the recovery of up to 100% of available waste heat, achieving maximum thermal efficiency and significant energy savings.

Building on decades of experience in preheating system design, the RPH offers a reduced footprint, simplified installation, lower capital cost, and the flexibility to handle any cullet ratio without modification to existing delivery systems.

With its first full-scale installation completed in 2025, the RPH represents the next generation of furnace energy recovery — delivering efficient, reliable performance.