Worcester Greenstar 12i System Boiler ERP

Worcester Greenstar 12i System Boiler ERP


The Worcester 12i System Boiler is the perfect choice for small properties such as flats and bungalows. Offering compact dimensions, a low lift weight and A-rated efficiency, the 12i has the potential to save money on your annual heating bills and offer reliability through even the coldest months.

Does not include filling link

  • Central Heating Output - 12kW
  • BTU Output - 40,000
  • Manufacturer product number: 7733600010

The Greenstar 12i System Boiler will require a hot water cylinder in order to deliver hot water to the property. It is worth checking with a heating engineer in regards to what type of cylinder your system requires.

The high efficiency of the 12i boiler can cut heating and hot water bills by 15-20% annually (When replacing an older, G-rated boiler) and is up to 30% cheaper to run. These savings mean that over the years the boiler will essentially pay for itself, as the quality of Worcester boilers means that you won't need to replace it for many years.

Please note that this boiler does not include a flue. If you require one, you will need the Worcester Standard Flue amongst any extensions. If you wish to use a Worcester System Boiler with one of Worcester's heating controls then the optional Diverter Valve Kit is required (the heating controls are incompatible with Y or S plan systems).


  • Integrated expansion vessel and pump
  • A-rated efficiency
  • Fully compliant with new ErP regulations
  • 25Kg for a true one man lift
  • Compact dimensions for a flexible installation
  • 5 Year warranty on Greenstar Gas Boilers as standard (terms and conditions apply)
  • 700mm h x 330mm d x 400mm w
  • Spec

    Brand Worcester
    Lead Time 1 - 2 working days
    Boiler Type System
    Fuel Type Natural Gas
    Heating Output Range < 24
    DHW Flow Rate No
    DHW Flowrate Range No
    Flue No
    Programmer No
    Output BTU/H No
    Height (mm) 700
    KW Output 12
    Width (mm) 400
    Depth 98
    Warranty 5 Years
    Manufacturer Part No: 7733600010