The worcester greenstar ri regular boiler 12000w delivers compact, wall-mounted heating engineered for small to medium-sized homes and existing system replacements. This space-efficient unit integrates seamlessly into standard kitchen cupboards. Compatible with worcester's high-efficiency greenstore cylinders, the system provides complete heating and hot water solutions for properties with traditional storage cylinder configurations. The intuitive control knob ensures straightforward operation. Frost protection safeguards the unit when installed in garages or lofts, reducing cold-weather risk. The boiler supports integration with greenskies solar panels for enhanced energy efficiency and running cost reduction. Future-proofed for hydrogen blends up to 20%, ensuring long-term operational capability. Features & benefits: compact wall-mounted design fitting standard kitchen cupboards for discreet installation. Simple control knob interface for straightforward heating management. Suitable for heating systems incorporating hot water storage cylinders. Compatible with greenskies solar panels for energy and cost savings. Frost protection included, reducing cold-weather risk in garage or loft installations. Hydrogen-ready design supporting 20% hydrogen blend operation for future fuel compatibility. Up to 10-year guarantee available when installed by worcester accredited installer. Output: 12000w 12kw .