Worcester Bosch Greenstar I System ErP review
Brand scoreShow Context
The Greenstar i System ErP series of condensing gas boilers comprises a range of six system boilers suitable for small to medium homes, and are an updated version of Worcester Bosch's popular i Junior range. They're compact enough to be fitted inside a kitchen cupboard, and are compatible with Worcester's programmers and Greenskies solar panels. Our full review will help you decide whether the Greenstar 12i System ErP will provide the heating power you need and will also tell you whether Worcester Bosch boilers are reliable.
- Pros and cons
- Heating engineer views
- What type of home is this boiler suitable for?
- Will this boiler produce enough hot water for my home?
- How efficient is this boiler?
First reviewed by Which?
Best boiler brands
Our independent research reveals the best and worst boiler brands, based on the experiences of owners and impartial opinions of real boiler engineers. The worst manufacturer scored a pitiful two stars for reliability.
Buying a new boiler
Need a new boiler? Here's everything you need to know about buying a boiler, including how much it costs, if you can get it for free, as well as the pros and cons of combis, heat-only and system boilers.
How to buy the best boiler
Expert advice on how to buy the best boiler for your home, including picking the right type, size and brand. We compare combi, heat-only and system boilers and let you know which is best for your home so you make the right choice.