The best, reborn.
Created from the DNA of the UK’s best-selling Greenstar i
Introducing the Greenstar 4000
Built on all the tried, tested and much-loved features of the Greenstar i, the Greenstar 4000 is instantly familiar and yet totally transformed.
We’ve raised the bar with the speed and ease of installation, commissioning and servicing, alongside improvements in efficiency and control. We’ve even made the price the same as its predecessor.
The 4000 range is available in both natural gas and LPG for:
- Combi - 25kW and 30kW with hot water flow rates up to 12.3 l/min.
- System - 12 – 24kW
The 4000 will also carry the same guarantee lengths as its predecessor the Greenstar i. Please note the Greenstar i System 27 and 30kW variants with the WB7 compact heat exchanger will continue to be available.
Making the nation's favourite boiler better
Guarantee Lengths
Standard Guarantee - 7 Years
With any Greenstar System Filter - 8 Years
With any Greenstar System Filter + £150 (Non-WAI Excelerate members only) - 10 Years
4000 training courses
Use our online booking system to secure a place on the free Greenstar 4000 webinar training course.
Can’t attend in person? Join our Facebook group ‘Worcester Bosch Training Academy’ where we’ll be releasing bite size training videos daily in June.
Why Worcester Bosch
Sign up to Excelerate
Open to all installers, earn loyalty points when you install our Greenstar boilers and accessories!
10 year guarantee
Terms and conditions apply. Available to Excelerate members. Non-Worcester Accredited Installers, can achieve this guarantee length by fitting any Greenstar System Filter and a £150 payment.
Simple Switch
A real time-saver for seamless swapping out with iJunior, Si combi and i System (2005-2015).
Join our virtual and face to face events
We’ll be running a series of online events where we’ll reveal everything behind the case and more. The events are available to all with a gas safe number.
When the time is right and it’s safe to do so, we’ll also be hosting face to face events up and down the country.