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Worcester Bosch Greenstar Si Boilers

Worcester Bosch Greenstar Si Boilers are SEDBUK A-rated for energy efficiency with a rating of 90.1%. Worcester Bosch Greenstar Si Boilers Compare Boiler Quotes

Greenstar si compact boilers that will fit in a kitchen cupboard are available in two different output flow rates: 25Si and 30Si. The 25 Si has a flow rate of 10.2 litres per minute, whereas the 30Si has a flow rate of 12.3 litres per minute.

These boilers are known as Worcester Bosch’s mid-range boilers, which would be suitable for small to medium-sized homes with one to three bedrooms and one bathroom.

Your Gas Safe registered engineer would decide on which size compact combi boiler would run your home’s heating and hot water to the best standard.

The boiler prices, not including installation fees or VAT, start at £745 to around £980.

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The Worcester Bosch Greenstar Si Boilers use natural gas or LPG as the fuel. Worcester Bosch Greenstar Si Boilers Compare Boiler Quotes

The boiler is easy to install and comes with user-friendly controls, which are easy for both yourself and the engineers to use along with the capability to fit with other controls, which will help with the efficiency and save money.

Attachments include a smart internet-connected Bosch EasyControl, room thermostats, mechanical and digital timers, and programmers.

The boiler also includes frost protection, a Low energy pump which reduces electrical usage, Hot water which can be adjusted to suit your needs and parts made out of products to make the boiler reliable. Worcester Bosch Greenstar Si Boilers Compare Boiler Quotes



Greenstar 25Si Combi H – 710 mm
W – 400 mm
D – 330 mm
10.2 l/min 25 kW 90% AND ABOVE £851.9
Greenstar 30Si Combi H – 710 mm
W – 400 mm
D – 330 mm
12.3 l/min 30 kW 90% AND ABOVE £952.64



SEDBUK Band A High energy efficiency
NOx Class 5- Low NOx and CO2 emissions Environmentally friendly
With DHW control and fault finding diagnostics User comfort Energy efficiency Boiler reliability Economy
Compatible with DT20 twin channel digital programmer, DT20RF digital RF thermostat, DT10RF digistat & optimiser. User comfort Energy efficiency Boiler reliability Economy
Compatible with simple mechanical controls MT10 & MT10RF Boiler reliability
Compatible with Bosch Intelligent controls like FR10 intelligent room thermostat, FR110 programmable room thermostat and FW100 weather compensation controller. Boiler reliability
Keep hot facility for instantly available hot water Convenience
Multi-directional fluing Siting flexibility
Compact dimensions Siting flexibility
Metal wall mounting frame hides pipework from view Siting flexibility
Inbuilt frost protection Longer boiler lifespan
Worcester- Bosch brand reliability Peace of mind
2 or 5 year Warranty until 30th June 2013 (terms & conditions apply) and 10 year guarantee on primary heat exchanger. Peace of mind



The two options of this boiler are both extremely efficient, compact, lightweight, and both able to connect with controls to enhance the performance and keep fuel bills low.

The standard warranty for parts and labour, is five years.  Worcester Bosch Greenstar Si Boilers Compare Boiler Quotes

Always ensure to stick to the guidelines to keep the warranty valid.


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