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Worcester Bosch Greenstar CDi Classic System

The Worcester Bosch Greenstar CDi Classic System is Worcester’s top-performing system boiler for medium to large properties with three to six bedrooms with multiple bathrooms, which have high heating requirements. 

It has a modern design and has some great controls and features. Worcester Bosch Greenstar CDi Classic System Compare Boiler Quotes

The Worcester Bosch Greenstar CDi Classic System is perfect for medium and large homes who have a much higher demand for hot water and heating than a small home.

It’s compatible with a variety of different controls that could help to improve efficiency and comfort levels.

It can fit into most kitchen cupboards, however, it does have built-in frost protection so it could also be installed in the loft or garage. 


How Much Does The Worcester Bosch Greenstar CDi Classic System Cost? 

The Worcester Bosch Greenstar CDi Classic System is a 30kW and 35kW heating output, the average cost of this boiler is £1062.46 including VAT. Worcester Bosch Greenstar CDi Classic System Compare Boiler Quotes

However, you need to make sure you take into consideration the cost of installation. This can vary depending on a variety of different factors such as the amount of work that is required to install it and the cost of the labourer.

If you would prefer a boiler which includes installation fees, go to

Is The Worcester Bosch Greenstar CDi Classic System Suitable For My Home? 

As a system boiler heats the central heating and hot water form a storage tank you do need to allow for space for this in your home (usually in the loft or an airing cupboard).

Most of the important parts such as the pump and expansion vessel are in the boiler itself so there Is less external parts than with other system boilers.

This boiler is ideal for medium to large home who have a higher than average requirement for hot water and heating.

System boilers are known for delivering a faster response for the demand for hot water and heating, there is no need to feed and expansion tank with this boiler.

When looking for a boiler for your home you should seek the advice of a gas safe registered engineer, who will be able to precisely calculate how much kW you need for your system to run smoothly and efficiently. 


Does It Have A Good Efficiency?

Yes, this boiler has a high-efficiency rating.

The Greenstar 30CDi Classic performs at an impressively high level of efficiency, it achieves a seasonal ErP A-rating for heat and an efficiency rating of 94%. Worcester Bosch Greenstar CDi Classic System Compare Boiler Quotes

This boiler is able to run on natural gas and LPG fuel too.

This state of the art condensing boiler is SEDBUK A-rated for efficiency and provides exceptional, advanced functionality, running economy, and reliability.

It is also compatible with Worcester’s new generation intelligent controls (Greenskies) solar water heating panels. This can help to reduce your carbon footprint. 


What Controls And Features Does It Have? 

This boiler comes with some great features and controls.

There is wide variety of different features available including clear temperature control and display, inbuilt key-less filling making it a breeze to fill your system, a low energy pump that can reduce electricity used, frost protection to enable you more choice for installations.

It’s also compatible with tools like Bosch Intelligent controls like FR10 intelligent room thermostat and the FR110 programmable room thermostat or the FW100 weather compensation controller. Meaning you can have control over your boiler and tailor your needs. 


How Long Is The Warranty?

With this boiler, you will receive a 2-year part and labour warranty as standard, as long as the boiler is installed by a licensed and qualified professional.

It’s a good idea for you to check the Worcester Bosch website before purchasing. They sometimes have a longer promotional warranty available.  Worcester Bosch Greenstar CDi Classic System Compare Boiler Quotes

Always follow the guidelines which you can read here, to ensure you keep your warranty valid.


Advantages & Disadvantages:



Although this boiler isn’t suited to small homes it still has many pros that make it a great choice for those with a medium to large home and higher hot water and heating demands. Worcester Bosch Greenstar CDi Classic System Compare Boiler Quotes

Let’s have a look below:


  • Has A-rated Efficiency of 94%.
  • Fits into most kitchen cupboards. 
  • Comes with frost protection so can be easily installed in a loft or garage instead. 
  • No need for an expansion tank. 
  • Simple boiler controls and clear temperature display.
  • Compatible with Eco-friendly controls.
  • Provides maximum energy efficiency, leading to a reduction in fuel bills and carbon emissions.
  • Compatible with solar thermal, leading to additional savings.
  • 7-year guarantee on the primary heat exchanger.



  • 2-year warranty, it would be nicer to have a longer standard warranty. 
  • Need to space for a storage cylinder.
  • Not suitable for smaller homes.


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