The Greenstar Heatslave II 25/32 External Combi Boiler is a high-output, oil-fired heating solution designed for outdoor installation, making it ideal for larger homes with higher heating and hot water demands. It provides both central heating and instantaneous hot water from a single, efficient unit, helping to save indoor space.
Built with a robust, weatherproof casing, it is designed to withstand outdoor conditions while delivering reliable year-round performance.
Key Features:
25–32kW output range (up to 32kW heating output)
Oil-fired condensing combi system
Designed for external installation
Weatherproof and frost-protected casing
High hot water flow rate (around 22 l/min)
Suitable for larger homes with multiple bathrooms
Energy efficient operation (ErP A-rated performance)
