The Greenstar Heatslave II 12/18 External Combi Boiler is a compact, oil-fired heating solution designed for outdoor installation, helping to free up valuable indoor space. It provides both central heating and instantaneous hot water from a single, efficient unit, making it ideal for smaller to medium-sized homes.
Built with a robust, weatherproof casing, it is designed to withstand outdoor conditions while maintaining reliable year-round performance.
Key Features:
12–18kW output range
Oil-fired condensing combi system
Designed for external installation
Weatherproof and frost-protected casing
Suitable for smaller to medium homes
High efficiency (ErP A-rated performance)
Space-saving outdoor design
