The Helios Fans WHR 100 is a compact water heater battery designed for integration with circular ducting systems. It features a galvanised steel casing and spigots equipped with double lip rubber seals on both ends, ensuring a secure fit with standard nominal ducts. The heating elements consist of copper cores with aluminium fins for efficient heat transfer. The unit is rated for a maximum operating temperature of 100°C and can withstand pressures up to 8 bar. For ease of installation, two inspection caps are provided on the water connection side.