Best Worcester Bosch Boilers Compare Worcester Bosch Boilers

Best Worcester Bosch Boilers Compare Worcester Bosch Boilers
Getting a new boiler is a big decision for any household, costing between £1,750 and £2,750, including installation. It’s always worth investing in a new boiler when you need it. Just ask anyone who has suffered a boiler breakdown and they’ll tell you it’s worth it! Launching in 1962 as part of the Bosch Group – Worcester Bosch is the leading manufacturer of boilers in the UK. Their boilers seem to always win the Which? Best Buy Award and the company’s boilers are even installed at Sandringham Palace. Let’s look at the best Worcester Bosch Boilers and compare them so you can choose the best option for your household.

 

In this article, the CompareCompanies team investigates the Worcester Bosch Greenstar range of 84 different, state-of-the-art boilers. You’ll find out more about…

  • Worcester Bosch Greenstar gas-powered combi boilers
  • Worcester Bosch Greenstar oil-powered combi boilers
  • Worcester Bosch Greenstar gas-powered system boilers
  • Worcester Bosch Greenstar oil-powered system boilers
  • Worcester Bosch Greenstar gas-powered regular boilers
  • Worcester Bosch Greenstar oil-powered regular boilers
  • Getting the best price for your Worcester Bosch boiler – up to 40% off

Worcester Bosch Greenstar boilers

The Greenstar range from Worcester Bosch is an award-winning range of oil-powered, gas-powered, and LPG-powered boilers. Each boiler in the series is either “A” or “B” rated by the Energy Saving Trust. During their design and construction, real attention has been paid to efficiency (bringing your utility bills down) and efficacy of operation (providing you with the hot water and heating you want when you want it).

As you’d expect from a world-class manufacturer, each model is thoroughly and rigorously tested before it arrives with the installer.

Output rates

In this article, we’ll list all the current Worcester Bosch’s Greenstar boilers across their combi, system, and regular ranges. Next to each model and model number, you’ll notice an output figure. The output figure refers to the amount of water that your boiler can heat at any one time.

When speaking to a potential installer, he or she will ask you how often you use your hot water taps and when. Using this information, they will be able to calculate the optimal output range of your proposed boiler installation.

Efficiency rates

The efficiency rating you see next to each boiler is shown in two different ways – with a percentage figure and with a rating. The percentage figure tells you how much of the power your boiler draws is actually used on providing you with hot water and central heating. The higher the energy efficiency percentage, the lower your energy bills will be.

The Energy Saving Trust rates all boilers with a 90% efficiency with an “A” grade and between 86-90% with a “B” grade.

What will your installer recommend for your property?

When deciding on your installer, you must go for a company that is authorised and regulated. The boiler your installer will recommend will depend on the size of your home and how much demand you’ll have for hot water at the same time.

As a rule of thumb, your installer will make their suggestion to you based upon the following table:

Where do you live?BedroomsBathroomsRadiatorsBoiler sizeIdeal boiler type
• Mid-terrace house
• Small bungalow
• Apartment
Up to 211024kW-27kWCombi
• Larger terrace
• Medium bungalow
• Medium semi
3+1-21528-34kWCombi
• Larger semi
• Large detached
4+2+2034-42kWCombi or Conventional

Worcester Bosch Greenstar combi boilers

Worcester Bosch’s Greenstar combi boilers are suitable for most UK homes as they offer very high energy efficiency ratings and superior performance levels. Combi boilers provide both hot water and central heating from a compact unit – they don’t require a separate tank to heat or store the water. Worcester Bosch’s Greenstar combi boilers work by heating water on demand so that it’s available whenever you need it.
Worcester Bosch’s Greenstar combi boilers also offer an ”ECO” function, only drawing energy when you turn on the hot water taps.
 

Worcester Bosch Greenstar gas-powered combi boiler benefits

Worcester Bosch’s Greenstar combi boilers fit perfectly into smaller homes and apartments. They don’t require any loft space nor do they require a separate cupboard in which to keep a hot water cylinder.
 
Combi boilers require less piping work reducing the amount you spend on installation.
 
If you’ve ever lived in a property where the pipes have frozen, you’ll know the disruption this causes. With a combi boiler, there are no pipes in the attic meaning there’s no possibility of the pipes freezing during winter.
 

Worcester Bosch Greenstar gas-powered combi boiler – pricing

Worcester Bosch’s current range of Greenstar gas-powered combi boilers is as follows:
ManufacturerModelModel NoTypeFuelOutputEfficiencyEff RatingWarrantyFromTo
Worcester BoschGreenstar24i JuniorCombiGas24kw89.10%B2 years£1,640£1,760
Worcester BoschGreenstar25Si CompactCombiGas25kw94%A2 years£1,222£1,342
Worcester BoschGreenstar25iCombiGas25kw94%A5 years£1,067£1,187
Worcester BoschGreenstar27CDiCombiGas27kw90.3A5 years£1,709£1,829
Worcester BoschGreenstar28CDi CompactCombiGas28kw92%A2 years£2,504£2,624
Worcester BoschGreenstar28i JuniorCombiGas28kw89.10%B2 years£740£860
Worcester BoschGreenstar29CDi ClassicCombiGas29kw89.10%B2 years£1,540£1,660
Worcester BoschGreenstarHighflow 440CDiCombiGas29kw92%A2 years£1,109£1,229
Worcester BoschGreenstar30CDiCombiGas30kw90.1A5 years£1,271£1,391
Worcester BoschGreenstarHighflow 550CDiCombiGas30kw92%A2 years£981£1,101
Worcester BoschGreenstar30Si CompactCombiGas30kw94%A2 years£1,056£1,176
Worcester BoschGreenstar30iCombiGas30kw94%A5 years£1,076£1,196
Worcester BoschGreenstar37CDiCombiGas32kw90.1A5 years£2,455£2,575
Worcester BoschGreenstar32CDi CompactCombiGas32kw92%A2 years£2,021£2,141
Worcester BoschGreenstar34CDi ClassicCombiGas34kw92%A2 years£1,009£1,129
Worcester BoschGreenstar36CDi CompactCombiGas36kw94%A5 years£956£1,076
Worcester BoschGreenstar38CDi ClassicCombiGas38kw92%A2 years£2,136£2,256
Worcester BoschGreenstar42CDiCombiGas42kw90.1A5 years£840£960
Worcester BoschGreenstar42CDi ClassicCombiGas42kw92%A2 years£1,190£1,310

Worcester Bosch Greenstar CDi compact combi boilers

The Worcester Bosch Greenstar CDi compact combi boilers are the company’s smallest range of combi boilers. They have been designed to provide the highest performance levels within the tightest possible spaces. The Worcester Bosch Greenstar CDi compact combi boiler series features high output ranges meaning that, despite their size, they have a good flow rate which means they can provide hot water at a good pressure level to more than one tap at a time.

Worcester Bosch Greenstar Si combi boilers

Worcester Bosch Greenstar Si combi boilers are the ideal choice for both small and medium properties. Easily wall-mountable, the range features in-built protection against frost, if you’d prefer to install the unit in your loft or garage.
 

Worcester Bosch Greenstar i combi boilers

Worcester Bosch Greenstar i combi boilers are designed for flats and for two-storey properties with a single bathroom.
 

Worcester Bosch Greenstar Highflow combi boilers

Worcester Bosch Greenstar Highflow combi boilers are specially designed for larger properties with greater demand on both hot water and heating needs. Ask your installer about Worcester Bosch Greenstar Highflow combi boilers if you have two or more bathrooms.
 

Worcester Bosch Greenstar oil-powered combi boiler benefits

The Heatslave II series is the oil-powered Greenstar range of Worcester Bosch combi boilers. Designed for families who want the benefits of a combi boiler but who do not have the inside space in which to store it. The Heatslave II units perform exceptionally well in the harshest of British weather. The unit’s components are completely protected against the worst that the UK climate can throw at it.
 
If you would prefer the unit to be installed indoors, it can be fit underneath a worktop in the kitchen if there is clearance for it.
 
They are very quick to install and they provide significant volumes of hot water instantly.

Worcester Bosch Greenstar oil-powered combi boiler – pricing

Worcester Bosch’s current range of Greenstar oil-powered combi boilers is as follows:

ManufacturerModelModel NoTypeFuelOutputEfficiencyEff RatingWarrantyFromTo
Worcester BoschGreenstarHeatslave II 18CombiOil18 kw91%A2 years£790£910
Worcester BoschGreenstarHeatslave II External 18kWCombiOil18kw91%A2 years£1,040£1,160
Worcester BoschGreenstarHeatslave II 25CombiOil25kw90%A2 years£2,192£2,312
Worcester BoschGreenstarHeatslave II External 25CombiOil25kw90%A2 years£2,290£2,410
Worcester BoschGreenstarHeatslave External 32CombiOil32kw90.3A5 years£2,140£2,260
Worcester BoschGreenstarHeatslave II 32CombiOil32kw91%A2 years£2,180£2,300
Worcester BoschGreenstarHeatslave II External 32CombiOil32kw91%A2 years£2,365£2,485

Worcester Bosch Greenstar system boilers

Many larger homes feature a system boiler that use a cylinder for storing hot water but, they don’t require a tank to be fitted into your attic.
 
Worcester Bosch Greenstar system boilers are attractive and compact, housing the components needed within the boiler unit. Many Worcester Bosch Greenstar system boilers can actually fit into a kitchen cupboard.
 

Worcester Bosch Greenstar gas-powered system boiler benefits

System boilers are better for homes where there is more than one bathroom or where water is in high demand. Worcester Bosch Greenstar system boilers can deliver hot water efficiently to every tap in your home concurrently without any drop in water pressure.
 
The Worcester Bosch Greenstar system boiler is easier to install than other models. As with the combi boilers, there is no need for a tank or piping in the loft meaning there’s no danger of the pipes freezing over.
 

Worcester Bosch Greenstar gas-powered system boiler – pricing

Worcester Bosch’s current range of Greenstar gas-powered system boilers is as follows:
ManufacturerModelModel NoTypeFuelOutputEfficiencyEff RatingWarrantyFromTo
Worcester BoschGreenstar12iSystemGas12kw94%A2 years£1,970£2,090
Worcester BoschGreenstar15iSystemGas15kw94%A5 years£1,548£1,668
Worcester BoschGreenstar18iSystemGas18kw94%A5 years£1,490£1,610
Worcester BoschGreenstar21iSystemGas21kw94%A5 years£1,095£1,215
Worcester BoschGreenstar24iSystemGas24kw94%A2 years£875£995
Worcester BoschGreenstar27iSystemGas27kw92%A5 years£790£910
Worcester BoschGreenstar30CDi ClassicSystemGas30 kw92%A2 years£748£868
Worcester BoschGreenstar30iSystemGas30kw92%A5 years£810£930
Worcester BoschGreenstar35CDi ClassicSystemGas35kw92%A2 years£864£984
Worcester BoschGreenstarGB162 50kWSystemGas50kw92%A2 years£922£1,042
Worcester BoschGreenstarGB162 65kWSystemGas65kw93%A2 years£921£1,041
Worcester BoschGreenstar9iSystemGas9kw93%A5 years£1,052£1,172

Worcester Bosch Greenstar i system boilers

The popular Worcester Bosch Greenstar i system boiler range has recently been updated and improved. They’re popular with installers because they are easy to fit. They’re also popular with homeowners because of the competitive prices and reduced labour charges.
 

Worcester Bosch Greenstar i Compact System Series

The Worcester Bosch Greenstar i Compact System Series, available in 27kw and 30kw output ranges, are suitable for all homes. These units are smaller and lighter than their predecessor models, offering superior output. 

Worcester Bosch Greenstar oil-powered system boiler – pricing

Worcester Bosch Greenstar oil-powered system boilers offer the same benefits as their gas-powered counterparts. The Danesmoor System Series offers plug-in control (optional – please ask your installer) and both the system pressure gauge and heating temperature control can be easily reached by lowering the front panel. All Worcester Bosch Greenstar oil-powered system boilers are compatible with solar hot water systems provided by Greenskies. Making them highly efficient units. 

Worcester Bosch’s current range of Greenstar oil-powered system boilers is as follows:

ManufacturerModelModel NoTypeFuelOutputEfficiencyEff RatingWarrantyFromTo
Worcester BoschGreenstarDanesmoor Utility 18SystemOil18 kw91%A2 years£1,127£1,247
Worcester BoschGreenstarDanesmoor 18SystemOil18kw91%A2 years£1,858£1,978
Worcester BoschGreenstarDanesmoor External 18SystemOil18kw91%A2 years£2,304£2,424
Worcester BoschGreenstarCamray Utility 25SystemOil25kw93.2A5 years£1,280£1,400
Worcester BoschGreenstarDanesmoor 25SystemOil25kw90%A2 years£1,940£2,060
Worcester BoschGreenstarDanesmoor Utility 25SystemOil25kw90%A2 years£1,940£2,060
Worcester BoschGreenstarDanesmoor External 25SystemOil25kw90%A2 years£1,540£1,660
Worcester BoschGreenstarCamray Utility 32SystemOil32kw94.2A5 years£2,040£2,160
Worcester BoschGreenstarDanesmoor 32SystemOil32kw91%A2 years£2,040£2,160
Worcester BoschGreenstarDanesmoor Utility 32SystemOil32kw91%A2 years£2,265£2,385
Worcester BoschGreenstarDanesmoor External 32SystemOil32kw91%A2 years£2,340£2,460

Worcester Bosch Greenstar regular boilers

For most homes in the UK, a combi boiler will be the default recommendation of a professional installer. Apart from in exceptional circumstances, your installer will recommend that you keep the current system you have.
 
Worcester Bosch Greenstar regular boilers, commonly known as heat only boilers, require a cold water storage tank to operate. These tanks provide the water needed to the hot water cylinder and to a special tank whose role is to keep the level of water constant within your central heating system.
 
Worcester Bosch Greenstar regular boiler control units are small and compact. You’re easily able to store one within a standard kitchen cabinet or cupboard.
 

Worcester Bosch Greenstar gas-powered regular boiler benefits

Ideal for larger homes with a high and constant requirement for hot water. Worcester Bosch Greenstar regular boilers can provide a good flow rate even in areas with low water pressure.
Installation of Worcester Bosch Greenstar regular boilers is quick and straightforward. Modern systems are generally back-compatible with standard radiators and pipework. Make sure you ask your installer for advice on whether a new Worcester Bosch Greenstar regular boiler installation will require additional work on the rest of your central heating system.

Worcester Bosch Greenstar regular boiler – gas-powered

Worcester Bosch’s current range of Greenstar gas-powered regular boilers is as follows:

ManufacturerModelModel NoTypeFuelOutputEfficiencyEff RatingWarrantyFromTo
Worcester BoschGreenstar12RiRegularGas12kw91%A3 years£2,203£2,323
Worcester BoschGreenstar15RiRegularGas15kw91%A2 years£2,224£2,344
Worcester BoschGreenstar18RiRegularGas18kw91%A2 years£2,012£2,132
Worcester BoschGreenstar24RiRegularGas24kw91%A2 years£2,012£2,132
Worcester BoschGreenstar27RiRegularGas27kw92%A5 years£1,970£2,090
Worcester BoschGreenstar30CDi ClassicRegularGas30kw92%A2 years£2,036£2,156
Worcester BoschGreenstar30RiRegularGas30kw92%A5 years£1,970£2,090
Worcester BoschGreenstarFS 30CDiRegularGas30kw92%A5 years£1,970£2,090
Worcester BoschGreenstar40CDi ClassicRegularGas40kw92%A2 years£1,548£1,668
Worcester BoschGreenstarFs 42CDiRegularGas42kw92%A5 years£1,435£1,555

Worcester Bosch Greenstar regular boiler – oil-powered

Worcester Bosch’s current range of Greenstar oil-powered regular boilers is as follows:

ManufacturerModelModel NoTypeFuelOutputEfficiencyEff RatingWarrantyFromTo
Worcester BoschGreenstarCamray 18RegularOil18kw93.1A5 years£840£960
Worcester BoschGreenstarCamray Utility 18RegularOil18kw93.1A5 years£2,140£2,260
Worcester BoschGreenstarCamray External 18RegularOil18kw93.1A5 years£2,240£2,360
Worcester BoschGreenstarDanesmoor External 18RegularOil18kw91%A2 years£2,040£2,160
Worcester BoschGreenstarDanesmoor 18RegularOil18kw91%A5 years£1,520£1,640
Worcester BoschGreenstarDanesmoor Utility 18RegularOil18kw91%A5 years£1,040£1,160
Worcester BoschGreenstarCamray 25RegularOil25kw93.2A5 years£780£900
Worcester BoschGreenstarCamray Utility 25RegularOil25kw93.2A5 years£725£845
Worcester BoschGreenstarCamray External 25RegularOil25kw93.2A5 years£671£791
Worcester BoschGreenstarDanesmoor 25RegularOil25kw90%A2 years£960£1,080
Worcester BoschGreenstarDanesmoor Utility 25RegularOil25kw90%A2 years£980£1,100
Worcester BoschGreenstarDanesmoor External 25kWRegularOil25kw90%A2 years£1,373£1,493
Worcester BoschGreenstarCamray 32RegularOil32kw94.2A5 years£1,580£1,700
Worcester BoschGreenstarCamray Utility 32RegularOil32kw94.2A5 years£1,490£1,610
Worcester BoschGreenstarCamray External 32RegularOil32kw94.2A5 years£1,915£2,035
Worcester BoschGreenstarDanesmoor 32RegularOil32kw90.70%A2 years£1,690£1,810
Worcester BoschGreenstarDanesmoor Utility 32RegularOil32kw91%A2 years£2,240£2,360
Worcester BoschGreenstarDanesmoor External 32RegularOil32kw91%A2 years£2,240£2,360
Worcester BoschGreenstarUtility 50RegularOil50 kw89%B2 years£1,320£1,440
Worcester BoschGreenstarUtility 70RegularOil70kw88%B2 years£1,315£1,435

Worcester Bosch FAQ

Worcester Bosch boiler warranties

Each of the boilers listed on this page comes with a warranty lasting between 2 and 5 years. A warranty offers you peace of mind that, should a fault develop with your boiler within the warranty period, that Worcester Bosch will resolve the problem for you free of charge.

Check with your installer whether your warranty covers parts, labour, or both. When you do get your boiler serviced, make sure that the person servicing your boiler is a registered Gas Safe expert. Please note that most warranties require you to carry out a servicing once a year during the warranty period and that failure to do so will invalidate the warranty.

Worcester Bosch boiler repairs

Only Gas Safe registered experts are allowed by law to maintain, service, or install boilers so please do not attempt to repair your boiler yourself. Please call Worcester Bosch, your installation engineer, or your maintenance engineer for advice.

Worcester Bosch boiler heating controls

Worcester Bosch has embraced digital and mobile technology to help its customers better and more easily control their boilers. Once your system is installed, you can download the Bosch EasyControl app from the App Store or Google Play – it works like a smart thermostat. If this is not of interest to you and you’d prefer the standard manual controls, please let your installer know.

Worcester Bosch boiler error codes

In the same way as with your car, your Worcester Bosch boiler system can tell you when something is wrong with it. It does so by displaying a code which your engineer will know how to interpret. The information your boiler displays will then be used by your engineer as part of a proven troubleshooting approach to determine what he or she needs to do to return the boiler to full working order.

Please contact your installation engineer or your maintenance engineer if your Worcester Bosch boiler displays a code that you don’t know the meaning of.

Worcester Bosch boiler and renewable heating

With many of the current Greenstar boilers, your installer can connect them to Greenskies Solar Panels (also manufactured by Worcester Bosch). These solar panels and solar thermal collectors use energy from the sun to heat the water in your boiler. Ask your installer for more information.

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