Our Greenstar i System boiler is our most popular system boiler that is suitable for small to medium sized homes.
The boiler can also be used with our high efficiency Greenstore cylinders for a complete system solution from Worcester.
5 year boiler guarantee as standard (terms and conditions apply)
10 year guarantee on primary heat exchanger.
Central heating output: 21kw
The ErP Directive is a new EU regulation designed to drive improvements in the efficiency of heating and hot water products. Most boilers will fall within the A band, meaning they achieve more than 90% seasonal efficiency, while renewable technologies such as heat pumps will likely be in the A+ or A++ bands.