Worcester Greenstar Si Compact Combi

Fitted from £2,040.00

Designed to fit within a standard kitchen cupboard the Si Compact combi boiler is perfect for small to medium sized homes with one bathroom, and has an easy to use control that allows you to fine tune your comfort.



Key benefits of the Worcester Greenstar Si Compact boiler:

  • Fits in a standard kitchen cupboard
  • User-friendly displays for ease of use
  • Hot water can be adjusted to fine tune your comfort
  • Wide choice of controls enables greater comfort and economy
  • Frost protection is included, reducing frost risk if installed in a garage or a loft
  • Simple boiler control knobs with clear temperature display
  • Low energy pump reduces electrical usage
  • Instantaneous hot water, always available
  • Achieves an A+ ErP package efficiency rating for heating when installed with an EasyControl smart internet connected control

Prices include VAT and the following:

  • Installation
  • Chemical system flush
  • Standard flue
  • Worcester Bosch Guarantee: 7 Years as standard, or 10 Years when a System Filter is included

Additional information


Worcester Bosch

Boiler Type

Combi Boiler


25Si Compact, 30Si Compact


Worcester 7 Years, Worcester 10 Years (including System Filter)


Natural Gas, LPG

Range Specifications

Greenstar 25Si Compact Greenstar 30Si Compact
ErP Efficiency Rating – Water Heating A A

ErP Efficiency Rating – Space Heating
ErP Data Sheet ErP Data Sheet ErP Data Sheet
LPG model available Yes Yes
EasyControl Compatible Yes Yes
Solar Compatible No No
Control Options Yes Yes
Hot water output (kW) 25 30
Dimensions (mm) height x width x depth 690 x 390 x 280 690 x 390 x 280
Hot water flow rate 35°c ∆T (litres per minute) 10.2l/min 12.3l/min
Hot water flow rate 40°c ∆T (litres per minute) 8.9l/min 10.7l/min


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