Compare Prices Of Worcester Bosch Greenstar CDi Classic System – Expert Reviews

(Why Worcester Bosch? What is the system type of boilers ?)

Warmth is the ultimate need of us all, be it a newborn, a teenager, a homemaker, an all day long workaholic, or even age-old parent of ours! Warmth is home! Winters make it daunting and stressing to free our body and head of all aches and cramps.

The advancing era has seen a large number of boiler brands come and go. Yet some seem to have stamped their identity into the industry.

It’s also important to know what to look out for in deciding the right boiler for your homes. And this factor is dependent on several other factors.

These are what determines the durability and assess the requirements needed to a particular home.  All we know is Worcester Bosch hasn’t let down a single customer in awe to its highly remarkable quality combined with beaminh efficiency. The task is all on the boiler and you are welcome to sit back and relax for your turn of warmth. 

Beyond all the surpassing doubts, Worcester Bosch has become a passive household name at every home in the UK!

Here we have enlisted all such common queries that could possibly arise during one such decision making regarding boilers.

Let’s take a look at the 3 ranges of Worcester Bosch Greenstar CDi classic System boiler


 A range of excellence that is best built for cozier and  closed spaces with restricted usage, lesser number of radiators and single bathrooms. It amounts to satisfaction only when used under smaller roofs since the design and operation is well suited for lesser quantity based activities


With brighter brands come brighter options. The 35CDi offers warmth and comfort for a medium range apartment that includes around 12 radiators approximately, 1 ensuite and 1 bathroom utmost.

Worcester Bosch Greenstar 30CDi Classic system9.2/10 Available£1,115.06 4.6 out of 5
Worcester Bosch Greenstar 35CDi Classic system8.8/10 Available£1245.62 4.4 out of 5


The boilers have been rated the No.1 in the UK amongst the other Boiler brands. 92% efficiency in its operation and hence proves to be the best one could look up to. The Worcester Bosch has been ranked as one of the best boilers All the time



  • SEDBUK Band A         
  • High energy efficiency
  • NOx Class 5- Low NOx and CO2 emissions
  • Environmentally friendly
  • Compact dimensions    
  • Siting flexibility
  • Fully condensing in CH mode for approximately 10% less on fuel bills
  • Economy
  • Manufactured with WB5 series heat cell and robust cast aluminium/silicon construction
  • Longer boiler Lifespan
  • Modulating circulating pump High energy efficiency
  • Heatronic III control system for sophisticated boiler management
  • User comfort Economy
  • Compatible with DT20 twin channel digital programmer, DT20RF digital RF thermostat, DT10RF digistat & optimiser.        
  • Energy efficiency
  • Central heating boost function        Convenience
  • Compatible with Bosch Intelligent controls like FR10 intelligent room thermostat, FR110 programmable room thermostat and FW100 weather compensation controller.         
  • Boiler reliability
  • Advanced Diagnostics display
  • Easy maintenance & serviceability
  • 2 or 5 year Warranty until 30th June 2013 (terms & conditions apply) and 10 year guarantee on primary heat exchanger.


  • Higher maintenance
  • Repair works are difficult and complex
  • Ease of servicing is considerably low


  • Dimension:
  • H – 760 mm
  • W – 440 mm
  • D – 360 mm
  • Flow rate : 14.3 l/min
  • Output: 30 kWA
  • Efficiency: 90% AND ABOVE


  • ErP rating (energy efficiency)- A (92%)
  • Size (HxWxD in mm) : 760x440x360
  • Heating output (kW):         35
  • Standard warranty (years) : 5 (extended warranties available)
  • Other available sizes (kW) : 30

These are the variants of the same design with major differences in Output, flow rate, and Price, depending upon the size and measure of your home, the number of radiators, and the number of bathrooms, one may choose the most appropriate design from the given below boiler models.

The 2  models are basically one and the same except for the advanced technicalities.

For detailed differences, we have compared them below :

Boiler makeWorcester BoschWorcester Bosch
Boiler typeSystemsystem
Fuel typeGasGas
Is condensingCondensingCondensing
Efficiency rating92%92%
Standard warranty5 years5 years
Band ratingA ratedA rated
ERP RatingA heat A waterA heat A water
Central heating max. o/p30kW35kW
Hot water max. o/pN/AN/A
Flow rate14.3l/m14.3l/m
LPG compatibleYesYes
Total cost£1,300-1,700£1,600-2,000
Typical price£ 1,200£ 1,410


Choosing the right one is equally significant to ensure safety.

Safety tied to any electrical device comes at a greater expense. The quality and reliability of a brand must be more vibrant than any of its contrasting features. 

Picking the right boiler from the wide varieties of models available in the market is quite a daunting task.

We have jot down the valid requisites to look out for while purchasing a boiler for your home.

  1. The size of your home is co relative to the boiler you wish to buy ?

The Size of your home decides the size of the boiler. Lesser the number of rooms and bathrooms, lower the required heating capacity. Hence, the ideal model would be 28CDi.

Choosing the right size includes two major factors:

  • Heating capabilities
  • Whether the physical size would fit your home space.

It would always be best to obtain further information and advice from an engineer regarding the heating efficiency required for your home and its installation.

The use of smaller boilers for a vaster home would only provide evident inefficiency.

  • Gas boilers

Choosing an efficient boiler also means moving ahead with time and advancement.  It would be appropriate to use the technically advanced method of heating than to stick with the older methods that could prove fatal or damaging to homes. Gas seems neater and more cost effective. The modern Gas condensing boilers result in a decent energy bill and higher returns of savings on resources.

  • Reliable Controls and safety apparatus.

Make sure the boiler you prefer to purchase is advanced enough to incorporate reliable safety measures, safety controls and offers precautionary measures. The device should be manufactured with utmost precision, hence the reliability of a famous brand like Worcester allows you to settle in peace.

  • Cost efficient and resourceful

The most highlighting feature as compared to boilers since decades is that modern boilers are resourceful and consume less electricity. They do not come with pocket tearing bills at the end of the month.


The industry influencers on a recent survey conducted have conclusively arrived at the fact that Popular fame of the brand is much due to reliability and productivity it has served over the years. Around 63% of families who seek to purchase a new boiler for their homes do a thorough research and end up buying the No.1 brand due to the ratings, which is ultimately Worcester Bosch.

The Worcester Bosch product comes with an ErP of 92% and an A rating that does its half for the environment as well.



  • Efficiency – 92%
  • Ease of use – 90%
  • Quality – 99%
  • Resourceful and cost-effective – 99%

Worcester has turned out as a casual and household name in the UK, since the beginning of time. Quality and reliability are the key features aimed at by the Worcester Bosch. The brand signifies its importance through the safety and sustainability provisions of the brand and its products. Efficiency, Durability, Sustainability are uncompromised to any extent.

Other features we have observed also include:

  • SEDBUK A rating of 90.5% (2005 value)
  • Reduction in raw materials due to the precise engineering of the WB7
  • All components are 100% recyclable
  • Low electrical standby consumption.


  • Efficiency – 93%
  • Ease of use – 90%
  • Quality – 99%
  • Resourceful and cost-effective – 99%

Our reliability on the brand is in due relation to the customer reviews and satisfaction the company has earned.

Worcester Bosch has never failed to satisfy the human wants and in fact have earned a class reputation over the decades of service. Worcester has turned out as a casual and household name in the UK, since the beginning of time.


  1. Name :William valentine
  • Date of purchase: 9th of September 2020
  • Rate: 5/5
  • Comment :  Fantastic boiler can’t fault it
  • Name: Mrs Barrow-Webb
  • Date of purchase: 3rd of October 2020
  • Rate: 5/5
  • Comment :

I have had 12months trouble free usage of my new boiler. Water and heating heats up much faster than my old boiler.


  1. What Output should I look for ? There are various outputs available.

Ans. Yes. There are a wide range of output options available. Hence one must go forth with the fuel available as resources to them plus the size of the apartment or home they reside. This decides the size of the device we require. One must try and get an engineer to assess their size of property to conclusively reach a proper output rate .

  • How often should I maintain the device?

Ans. This is quite interesting. Indeed we use the boilers much exclusively during winters. But the proper maintenance of these devices could ensure they do not break down when under usage. Such devices, if broken, take time and effort to put back to service. Hence it would be appreciable if maintained at regular intervals.

  • My boiler is producing a ‘gurgling’ sound. What could be the cause?

This gurgling sound may be caused by a blocked condensate pipe, please contact your installer to resolve the issue.


  • Recycling of water

Boilers utilize a closed system. This means that they recycle heated water repeatedly and don’t use any more energy than the majority of the other available heating systems.

More often, they are actually the most environmentally friendly decision especially if you select a high-efficiency boiler installation. This will keep your energy bills low and help you save money on your water heater.

●      New boilers are more efficient And environment safe

 The new boilers on the market are highly efficient, that you could find yourself paying 10 to 20 percent of what you used to pay when you had your old heating system in place. But if you habitually turn down the thermostat, you are most likely to reach this goal.

●    It is better to know the basics of a boiler by reading the manual after a purchase. It is clearly understood that small pause and breaks could be handled by us ourselves. And we do not require professional aid at all times.


After a deep and extensive amount of research, we have refined out the essentials one seeks when in search of a device for heating water for homes. The boilers in the market seem to satisfy different and substantial requirements in various ways.

Worcester Bosch Greenstar CDI Classic System has proved to be one of the best boilers at any cost from any angle.

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