New Guarantee Lengths
We understand we are all in an aggressive and ever-changing market and from listening to you, our installers, we know that the exclusive extended guarantees have become a barrier to selling a Worcester Bosch boiler.
We have simplified our offering so that you can offer up to a 12 year guarantee.
Download our guarantee matrix
Use our easy guarantee matrix, to make sure you know what guarantee lenghts you can offer

Greenstar Lifestyle 8000
Register a Greenstar 8000 Lifestyle with any Greenstar System Filter and receive up to a 12 year guarantee.
- Standard Guarantee - 8 Years
- With any Greenstar System Filter - 10 Years
- With any Greenstar System Filter + £150 (Non-WAI Excelerate members only) - 12 Years
Greenstar 4000
Register a Greenstar 4000 with any Greenstar System Filter and receive up to a 10 year guarantee.
- Standard Guarantee – 7 Years
- With any Greenstar System Filter – 8 Years
- With any Greenstar System Filter + £150 (Non-WAI Excelerate members only) - 10 Years


Greenstar CDi & Si Compact, or Ri
Register Greenstar CDi & Si Compact, or Ri with any Greenstar System Filter to receive up to a 10 year guarantee.
- Standard Guarantee - 7 Years
- With any Greenstar System Filter - 8 Years
- With any Greenstar System Filter + £150 (Non-WAI Excelerate members only) - 10 Years
Greenstar 2000
Register Greenstar 2000 with any Greenstar System Filter to receive a 6 year guarantee.
- Standard Guarantee - 5 Years
- With any Greenstar System Filter - 6 Years


Greenstar Oil Boilers
Register any Greenstar Oil boiler with any Greenstar System Filter to receive up to a 7 year guarantee.
- Standard Guarantee - 2 Years
- With any Greenstar System Filter - 5 Years
- With any Greenstar System Filter + £150 (Non-WAI Excelerate members only) - 7 Years
Extend your guarantee with system filters
Extended guarantees can be achieved by fitting any of our Greenstar System.
- Greenstar System Filter (22mm)
- Greenstar System Filter (28mm)
- Greenstar Mini System Filter (22mm)
- Greenstar Brass System Filter (22mm)

Register your boiler guarantee
Simply complete the online guarantee registration form.
Excelerate loyalty scheme members please login to register your guarantee and collect points.

Join our new loyalty scheme
We’re excited to introduce you to our loyalty scheme structure that puts you in the driving seat and helps you reach the goals you have for your business.
Progressing up our ‘loyalty ladder’ is now a seamless journey, with one clear and open road to collecting more and more benefits as you accelerate your business with us.

MyWorcester app
Don’t forget you can register your guarantees and gas safe notifications via our MyWorcester app!

Check your customers' guarantee length
Enter the 23 digit serial number to check the guarantee length remaining on your customers' guarantees.