The Greenstar Heatslave II 18/25 Combi Boiler is a high-efficiency oil-fired heating solution designed for medium-sized homes. It provides reliable central heating and strong hot water performance from a single compact floor-standing unit, making it ideal where space is limited.
Its modern design and weather-resistant construction (for external versions) allow flexible installation indoors or outdoors, while built-in controls and advanced burner technology ensure efficient, consistent operation.
Key Features:
18–25kW output (heating up to approx. 25kW)
High hot water flow rate for everyday demand
Oil-fired condensing combi efficiency
Compact floor-standing design
Suitable for medium homes (often 1–2 bathrooms)
Easy-access servicing components
Energy efficient operation (ErP rated)
