The Helios Fans WHR 2÷70÷40 is a hot water heating register designed for ducted ventilation systems, featuring flanges on both sides for secure and easy installation. The housing is made from galvanized sheet steel, ensuring corrosion resistance and long-term durability. The heat exchanger uses staggered copper pipes combined with aluminium fins for efficient heat transfer. This unit is capable of handling a maximum operating temperature of 100 °C and a pressure of up to 8 bar. The water connection pipes are equipped with external threads, allowing for straightforward integration into heating systems.