Worcester Bosch Greenstar 4000 21kW System Boiler Including Flue & 15mm Scale Reducer

The Worcester Bosch Greenstar 4000 21kW System Boiler Including Flue & 15mm Scale Reducer is a premium heating package designed for modern homes with a sealed heating system and an unvented hot water cylinder. Supplied with a horizontal flue kit and a 15mm Scale Reducer, this complete solution delivers reliable central heating while helping to reduce limescale build-up in hard water areas, protecting the boiler and maintaining long-term efficiency. Combining Worcester Bosch's renowned engineering with quiet operation and smart control compatibility, the Greenstar 4000 is an ideal choice for homeowners seeking dependable, energy-efficient heating. Designed...