The Greenstar Heating System Care Packs offers cost-effective system solutions, that extends the life of the boiler, while allowing you to comply with both Boiler Plus and BS7593. Each care pack contains one of Worcester's Greenstar System Filters, unlocking an extended guarantee across our gas boiler portfolio, a control, as well a comprehensive range of accessories, making installation and servicing quick and easy. The controls can be fitted to all boiler types subject to additional accessories needed for system and regular boilers.