Worcester Bosch Greenstar 25KW Si Compact GB NG Combi ErP

£1,399.00 £1,299.00 inc.VAT

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In the 2014/15 report and for the fourth year running the entire range of Worcester Greenstar gas boilers have been awarded Which? Best Buy, the only boiler manufacturer to have been awarded Best Buy status.

The all new 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) • 5 year boiler guarantee as standard (terms and conditions apply) • 10 year guarantee on primary heat exchanger and 5 year anti-scale guarantee on domestic hot water heat exchanger (subject to terms and conditions) • Can be installed in a standard kitchen cupboard without the need for ventilation • 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



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. This boiler is registered with the Energy Saving Trust.


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