The Glow-worm Ultimate3 system boiler is ideal for houses that require a lot of hot water. The Ultimate 3 system is a sealed system with a 25kW output, variable flue choices, and an aluminium heat exchanger for proven dependability and performance. The Ultimate 3 also has a Grundfos modulating pump for energy savings and a contemporary, vivid LCD display with an easy-to-use interface. Parts and labour are covered by a 5-year warranty. For further convenience and value, the boiler comes with a horizontal flue pipe.

• High-grade aluminium heat exchanger for proven and reliable performance
• The Grundfos modulating pump has a high efficiency for reduced energy consumption
• It is simple to install and maintain
• The 5 years guarantee was increased to a 10 years warranty. It must be installed with a filter and registered on Club Energy
• High efficiency modulating grundfos pump for reduced energy use