A non-toxic, concentrated heat transfer fluid for Air and Ground Source Heat Pumps and underfloor heating systems. This product is designed to protect against corrosion and limescale, as well as frost protection from -4 to -14°C. It offers high performance and is pH stable, compatible with all materials commonly found in Heat Pump and underfloor heating systems. The fluid provides protection against corrosion and limescale, and frost protection from -4°C to -14°C.