Fernox manufactures products to prevent and remove limescale buildup in central heating systems. Limescale reduces boiler efficiency over time and can damage components. Fernox offers chemical treatments and devices that homeowners and installers can use to restore system performance, such as their Superconcentrate Limescale Preventer and Fry Electrolytic Scale Reducer. For severe limescale, their DS-3 Limescale Remover can dissolve up to 50% of its own weight in scale.