Worcester Greenstar 25SI 25kW Combi Boiler with Horizontal Flue Pack 7733600050

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Worcester Greenstar 25SI
25kW Combi Boiler | 7733600050


The all new Worcester Greenstar gas-fired Si Compact is the successor to the Greenstar Si combi boiler.

Ideal for apartments and small to medium sized properties with one bathroom, it has a host of performance-enhancing features, including the revolutionary WB7 heat exchanger which enables the appliances to deliver DHW flow rates of 10.2 and 12.3 l/min despite their compact size.

The new Greenstar Si Compact has been designed to make installation and commissioning easier and quicker and comes supplied with a unique wall-mounting jig which enables the installer to quickly pre-plumb all seven pipe connections without the boiler being on the wall.

  • A rated efficiency (SEDBUK 2005 value)

  • Can be installed in a standard kitchen cupboard without the need for ventilation (a standard cupboard is 720mm high by 600mm wide by 300mm deep)

  • Split jig design for optimum lift weight (32.9kg)

  • The expansion vessel has a simple drop lock mechanism that connects directly onto the hydraulic unit

  • Ability to pre-plumb all 7 connections without the boiler being on the wall – gas, water, PRV & condensate connections

  • Robust wall mounting frame provided as standard allows space for pipes behind the boiler

  • LCD boiler display for operation status, commissioning features and diagnostics

  • EMS-BUS compatibility enables use with Worcester intelligent controls series

Name Worcester Greenstar 25Si Compact Combination Boiler Natural Gas ErP 7733600050
Product Code 143218
MPN 7733600050
EAN 4054925618938
Type Gas Boiler
Sub Type Gas Combi
Colour White
Warranty (Years) 7
Width (mm) 390
Height (mm) 690
Depth (mm) 280
Weight (Kg) 32.9
Output (Kilowatts) 25
ErP Space Heating Efficiency A
ErP Water Heating Efficiency A
Flow Rate (L/min) 10.2
Fuel Natural Gas
Mounting Wall

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