Worcester Greenstar 25Si Compact ERP Gas Combi Boiler
  • Worcester Greenstar 25Si Compact ERP Gas Combi Boiler


    This Worcester Bosch Greenstar boiler is an industry favourite and has won the Which? Best Buys award seven years running. Worcester are notorious for providing the best quality products for their customers. They were originally founded in 1962 and Worcester became part of the Worldwide Bosch Group in 1996. They are the UK market leader in domestic boilers and Direct Heating Supplies offer a range of Worcester Bosch boilers online.

    With a central heating output of 24kW, the 25Si Compact is an ideal hot water and central heating solution and is able to service smaller properties with up to 3 bedrooms and a single bathroom - typically a flat, bungalow or small house.

    The biggest innovation surrounding the new Si Compact range is the size of the boilers themselves. With dimensions 690mm (h) x 390mm (w) x 280mm (d), the 25Si Compact is the smallest combi boiler to have ever been produced by Worcester Bosch. It’s so small that it can be installed within most kitchen cupboard spaces, making it fit seamlessly into your home and easy to keep our of sight.



    • A-rated efficiency
    • Compact dimensions
    • Jig & 7 pre-plumb connections make it possible to pre-plumb without the boiler being mounted on the wall, allowing quick installation
    • Built in LCD display for current operation status & fault diagnosis
    • Lightweight (32.9kg)
    • EMS-BUS compatibility for use with Worcester Intelligent Controls series
    • 10 year warranty on primary heat exchange, 5-year anti-scale warranty on domestic hot water heat exchanger (subject to terms and conditions).
    • 5 Year warranty on Greenstar Gas Boiler as standard (terms and conditions apply)

    Does not include filling link

    This Combi Boiler will need a flue, as one is not supplies as standard. Purchase all you will need for our boiler install by buying a boiler pack.

    • Specs

      Brand Worcester
      Lead Time 1 - 2 working days
      Boiler Type Combi
      Fuel Type Natural Gas
      Heating Output Range 24 - 29
      DHW Flow Rate 10.2
      DHW Flowrate Range < 12
      Flue None
      Programmer None
      Output BTU/H 85,000
      Height (mm) 690
      KW Output 24
      Width (mm) 390
      Depth 280
      Warranty 5 Years
      Manufacturer Part No: 7733600050