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Greenstar 12i System

Greenstar i in a kitchen
Image of Greenstar i boiler


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.

Image of 5 year guarantee logo (with extra padding)5 year boiler guarantee as standard (terms and conditions apply)

10 year guarantee on primary heat exchanger.

Central heating output: 12kW


  • 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.
  • Solar compatibleThis boiler is compatible with Greenskies solar panels
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Features and benefits

  • Suitable for homes where the heating system includes a hot water storage cylinder
  • All system components are neatly contained within the boiler
  • Can be used with Worcester controls and Greenskies solar panels for energy and cost savings

Product brochure

Greenstar gas boilers brochure image

Greenstar gas-fired condensing boilers from Worcester.

Download this brochure Order a printed copy of this brochure

Find an installer

Worcester installer helping a customer choose the correct product

As a manufacturer, we supply through trade rather than directly to the public which is why we are unable to publish prices on our website.

Your local Worcester Accredited Installer, who can be found using the search below, will be happy to contact you and provide you with a free quote. Worcester Accredited Installers specialise in Worcester products and many can offer extended warranties.

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