The UK’s best-selling oil boiler and its easy to see why. The Greenstar Heatslave II offers flexibility to fit neatly under a kitchen counter or be installed outside, freeing up indoor space. Ideal for small to medium-sized homes, it delivers instant hot water even in off-grid locations. Pair it with a Worcester Bosch high-efficiency Green Storage cylinders for a fully integrated Worcester Bosch system.

For compatibility and suitability advice, please contact Oceanair.

• GoodHome approved
• Works seamlessly with Greenstar Comfort controls
• Intelligent pull-out interface for ease of use
• Concealed controls, ideal for homes with small children
• Compact and floor standing boiler, suitable for homes with limited space
• Features a cross-firing burner for efficient performance
• 2 water modes for energy efficiency and cost-saving
• ErP A-rated for energy efficiency
• For use with kerosene (Class C2) only
• Designed for internal installation
• Digital interface for precise heating and hot water management
• Compatible with 80/125mm room-sealed flue systems, available up to 8m in length
• Plume management options up to 5m with both conventional and flexible flue kits
• Convenient front access for servicing, including a pivoting expansion vessel for easier maintenance
• Simple access to oil and hydraulic connections for a hassle-free setup

*See Technical Attachments for more precise parameters and conditions.