Willis External Immersion Heater (One Piece)

The Economiser is fitted in parallel to the main domestic hot water cylinder and heats the water from the top down. So, for a shower (typical requirement – 35 litres @ 40°C), the Economiser will heat only the top 35 litres of the cylinder in about 10 minutes, and the unit should then be switched off.

2.85kW heating element.

Not suitable for use in hard water areas.

Not suitable for use as a standalone water heater, a Willis Heater must only be used in conjunction with a vented hot water cylinder.