Worcester Bosch designed for various sized properties, the heatslave II 18 mm x 25 mm boiler features easy access connections for installation piece of mind. The heatslave II also includes the next generation heatronic 4i digital control unit which provides accurate control and diagnostic information.

• Optional integral programmers available
• Horizontal, vertical and plume management flue options available
• 2 Years guarantee extended to 5 years when installed with any Greenstar system filter