The cost of a new Worcester Bosch boiler, including installation, is likely to fall between £1,800 and £3,000.
Why such a range? The exact cost of installing a new Worcester Bosch boiler in your home will vary depending on the type and size of boiler you are buying, as well as the type of boiler you are replacing.
This table provides an approximate installation cost for a new Worcester Bosch boiler.
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| Old Boiler Type | New Boiler Type | Approximate installation cost (size 25-30kW, small to medium homes) | Approximate installation cost (size 35-40kW, medium to large homes) |
|---|---|---|---|
| Combi | Combi | £1,200 | £3,500 |
| Combi | System | £1,200 | £4,000 |
| Combi | Regular | £1,200 | £4,000 |
| System | System | £1,250 | £3,500 |
| System | Combi | £1,200 | £3,500 |
| System | Regular | £2,500 | £4,500 |
| Regular | Regular | £2,500 | £4,000 |
| Regular | Combi | £2,500 | £4,500 |
| Regular | System | £2,500 | £4,500 |
However, it’s important to note that these prices are indicative only. To get an accurate quote, you should contact at least 3 Gas Safe registered installers who will be able to assess the work required and recommend the correct boiler type/size. You can also use the WhatPrice Boiler Installation Cost Calculator for a gas boiler estimate for your specific home.
Overview of Worcester Bosch boilers and their reputation
Worcester Bosch is one of the best-known boiler brands in the UK and has won many awards for both its products and environmental initiatives. Worcester Bosch’s gas combi boilers have won Which Best Buy Awards (voted for by customers) for 15 consecutive years.
After their Best Boiler Brands survey of September 2024, Which concluded: ‘Worcester Bosch boiler owners tend to be more satisfied than the average (82%) and were the happiest customers of any of the brands in our survey.’
In addition to gas boilers, Worcester Bosch also offer a range of oil and LPG boilers, smart heating controls, and air conditioning solutions.
Why choose a Worcester Bosch boiler?
From the customer reviews available online, commonly reported benefits of choosing a Worcester Bosch boiler include reliability, efficient installation, and excellent customer service. Worcester Bosch boilers are renowned for their longevity (some lasting more than 20 years), energy efficiency, and also for being relatively quiet when in operation. Worcester Bosch engineers are often described as knowledgeable and thorough, offering prompt repairs and an excellent warranty service.
Who makes Worcester Bosch boilers?
Worcester Bosch boilers are made by the Bosch Group as the company is part of the Bosch Home Comfort Group. The Bosch Group is a multinational engineering and technology company headquartered in Germany.
Company background
Worcester Bosch began as a small engineering works in Worcester, England, in 1962. The company began manufacturing and supplying oil-fired central heating boilers, before introducing gas-fired boilers in the 1970s.
Originally named Worcester Engineering (and then renamed Worcester Heat Systems in the 1980s), the company joined the Bosch Group in 1992. Today, more than 60 years later, it is one of the leading boiler brands in the UK.
Types of Worcester Bosch boilers
Worcester Bosch manufactures gas, oil and LPG boilers. They offer types and sizes for every home, including combi, system, and regular boilers.
Worcester Bosch combi boilers
Combi boilers are all-in-one compact units that take their water supply directly from the mains. They produce hot water for heating and domestic use on demand which can be a real advantage in terms of convenience and energy efficiency, i.e., it only heats water as and when it’s needed.
However, combi boilers have no way of storing hot water, so if the boiler needs to send hot water to multiple taps at once, there can be a drop in water pressure. This can make them unsuitable for larger homes and/or those with a higher demand for hot water.
Worcester Bosch’s range of gas combi boilers includes boilers for small, medium and large homes including:
- Greenstar 8000+ Style (32kW, 36kW)
- Greenstar 8000+ Combi (32kW, 36kW, 40kW, 45kW, 50kW)
- Greenstar 2000 (25kW, 30kW)
- Greenstar 4000 (25kW, 30kW)
- Greenstar CDi Compact (28kW, 32kW, 36kW)
- Greenstar CDi Highflow (44kW, 55kW)
All Worcester Bosch combi boilers have an ErP efficiency rating of A for both central heating and hot water and, when installed by a Worcester Bosch accredited installer, include a warranty of up to 7, 10 or 12 years. You can compare Worcester Combi Boilers with other manufacturers in our best combi boilers write up.
Worcester Bosch system boilers
System boilers also take their water supply directly from the mains, but they work alongside a hot water cylinder which is usually stored in an airing cupboard. The hot water cylinder stores the hot water produced by the boiler so that a greater volume of hot water is available if it needs to supply multiple radiators/taps/showers at once without reducing water pressure.
Worcester Bosch’s range of gas system boilers includes boilers for small, medium and large homes including:
- Greenstar 8000+ System (30kW and 35kW)
- Greenstar i System compact (27kW and 30kW)
- Greenstar 4000 System (12kW, 15kW, 18kW, 21kW, 24kW)
While the boiler will only provide hot water for your central heating, it can be used with Worcester Bosch’s range of high efficiency Greenstore cylinders to also provide hot water for your taps.
All Worcester Bosch system boilers have an ErP efficiency rating of A for central heating and, when installed by a Worcester Bosch accredited installer, include a warranty of up to 10 or 12 years.
Worcester Bosch regular boilers
Regular (also known as traditional or conventional) boilers are similar to system boilers as work alongside a hot water cylinder and so can supply multiple water outlets at once.
The difference between a system and a regular boiler is that they do not take their water supply from the mains, but from a large feeder tank of cold water which is typically located in the attic of the home.
Regular boiler systems came first, before engineering found a way to connect boilers directly to the mains which generally results in stronger water pressure. However, regular boilers can still be the best heating solution in modern installations, particularly if you live in an area of low mains water pressure.
Worcester Bosch’s range of gas regular boilers includes boilers for small, medium and large homes including:
- Greenstar 8000+ Regular (30kW, 35kW, 40kW, 45kW, 50kW)
- Greenstar Ri (12kW, 15kW, 21kW, 24kW, 27kW, 30kW)
- Greenstar CDi FS Regular (30kW and 42kW)
All Worcester Bosch regular boilers have an ErP efficiency rating of A for central heating and, when installed by a Worcester Bosch accredited installer, carry a warranty of up to 10 or 12 years.
Worcester Bosch oil boilers
Oil fired boilers are often installed in rural homes that are not connected to the gas grid. The oil is stored in a large underground tank that needs to be re-filled when it runs out. Oil boilers can either be installed inside the home or outside.
Worcester Bosch produces a range of combi, system, and regular oil-fired boilers for internal or external installation.
- Greenstar Heatslave II Combi
- Greenstar Heatslave II External Combi
- Greenstar Danesmoor System Utility
- Greenstar Danesmoor External System
- Greenstar Utility Regular
- Greenstar Danesmoor External
- Greenstar Danesmoor Utility
All Worcester Bosch oil boilers have an ErP efficiency rating of A for central heating and combi boilers are rated B for hot water. When installed by a Worcester Bosch accredited installer, carry a warranty of up to 7 years.
Worcester Bosch boiler models and price guide
The price of a Worcester Bosch boiler model will be affected by the model you choose and by the size of the boiler you require. Below are some approximate Worcester Bosch combi boiler prices, excluding installation, based on online prices.
Worcester Bosch combi boiler prices
| Model | Approximate cost of boiler | Approximate cost of installation | Approximate total cost |
|---|---|---|---|
| Greenstar 2000 | £950 | £1,200 | £2,150 |
| Greenstar 4000 | £1,200 | £1,200 | £2,400 |
| Greenstar CDi Compact | £1,1200 | £1,200 | £2,400 |
| Greenstar CDi Highflow | £1,500 | £1,200 | £2,700 |
| Greenstar 8000+ Combi | £1,600 | £1,200 | £2,800 |
| Greenstar 8000+ Style | £1,655 | £1,200 | £2,855 |
Worcester Bosch system boiler prices
| Model | Approximate cost of boiler | Approximate cost of installation | Approximate total cost |
|---|---|---|---|
| Greenstar 4000 System | £1,290 | £1,700 | £2,990 |
| Greenstar i System Compact | £1,520 | £1,700 | £3,220 |
| Greenstar 8000+ System | £1,670 | £1,700 | £3,370 |
Worcester Bosch regular boiler prices
| Model | Approximate cost of boiler | Approximate cost of installation | Approximate total cost |
|---|---|---|---|
| Greenstar Ri (12kW to 24kW) | £975 | £1,700 | £2,675 |
| Greenstar Ri (27kW) | £1,300 | £1,700 | £3,000 |
| Greenstar 8000+ Regular | £1,650 | £1,700 | £3,350 |
| Greenstar CDi FS Regular | £2,350 | £1,700 | £4,050 |
Worcester Bosch oil boiler prices
| Model | Approximate cost of boiler | Approximate cost of installation | Approximate total cost |
|---|---|---|---|
| Greenstar Utility Regular | £2,050 | £1,900 | £3,950 |
| Greenstar Danesmoor System Utility | £2,070 | £1,900 | £3,970 |
| Greenstar Danesmoor Utility | £2,090 | £1,900 | £3,990 |
| Greenstar Danesmoor External | £2,200 | £1,900 | £4,100 |
| Greenstar Danesmoor External System | £2,360 | £1,900 | £4,260 |
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Comparison of prices across models
From this research, Worcester Bosch’s cheapest boiler models are combi boilers, followed by system, regular, and then oil boilers as the costliest. The cheapest combi boiler is the Greenstar 2000 while the most expensive is the Greenstar 8000 Style+.
The Greenstar 4000 System is the cheapest system boiler available from Worcester Bosch, while the costliest is the Greenstar 8000+ System.
The cheapest regular boiler by Worcester Bosch is the Greenstar Ri while the floor standing Greenstar CDi is the most expensive.
When it comes to oil boilers, the external models cost more than the internal models.
Of course, these prices do not include the cost of installation which will be impacted by the type of boiler you are replacing as well as the boiler you are installing.
Best Worcester Bosch boilers for different homes
So, we have explored the cost of Worcester Bosch boilers including and excluding installation, as well as the range of models available, but which is the right Worcester Bosch boiler for your home?
It is important to seek the advice of a qualified heating engineer before purchasing a boiler but is a summary of Worcester Bosch boiler models and where they are best suited.
Best combi boiler for small homes & apartments
The Greenstar 2000 combi boiler from Worcester Bosch is ideal for small homes as it provides hot water and heating on demand from one all-in-one compact unit, i.e., there is no need for a hot water cylinder.
This model is also Quiet Mark certified, so if you need to install it in your kitchen you won’t need to worry about how noisy it is when operating. It is A-rated for efficiency keeping your bills to a minimum and reducing impact on the environment.
Best system boiler for family homes
The Greenstar i System Compact is a good choice for busy family homes with a high demand for hot water. While the boiler itself is compact enough to fit into a kitchen cupboard, when working alongside a Greenskies hot water cylinder it supplies hot water to multiple outlets at once without losing pressure. In addition, it can be paired with Worcester Bosch Greenskies Solar Panels to reduce running costs even further.
Best regular boiler for large homes
Nicknamed the brand’s “big time boiler”, the Greenstar 8000+ Regular boiler from Worcester Bosch is able to keep up with the demand of large homes with multiple bathrooms. It operates at 94% central heating efficiency to keep your bills low and can work automatically alongside a Greenskies hot water cylinder, refilling the system as needed to maintain optimum boiler pressure.
Key features of Worcester Bosch boilers
While each Worcester Bosch boiler model offers its own benefits, there are some features that are found across their product range that makes this brand stand out.
Energy efficiency and savings
All Worcester Bosch combi, system and regular boilers are A rated in terms of ErP efficiency. This is the highest level of efficiency a boiler can be given, as it means for every £1 spent on fuel for your boiler, less than 10p is wasted.
Which? Best Buy top rated
Every year the Which? Best Buy survey asks homeowners and Which? Trusted Trader heating engineers to discover how satisfied they are with the boilers of each brand. In terms of homeowner satisfaction, Worcester Bosch is the only brand in the most recent survey to score a full five stars. The brand has topped the survey for 15 years.
Quiet Mark certified
Quiet Mark is the independent global certification programme associated with the UK Noise Abatement Society charitable foundation. Through scientific testing and assessment Quiet Mark identifies the quietest products in multiple categories spanning many sectors, including central heating. Several of Worcester Bosch’s boilers have been awarded the Quiet Mark.
Worcester Bosch boilers vs competitor brands
Of course, there are plenty of boiler brands to choose from, so how does Worcester Bosch compare?
Worcester Bosch vs Vaillant
Vaillant is another boiler brand based in Germany, but they have an even longer history with 140 years behind them. Despite this, Vaillant also manufacture their products in the UK, and, like Worcester Bosch, several boilers have been awarded the Quiet Mark certification.
Vaillant and Worcester Bosch produce boilers that are A rated for efficiency and include warranties of up to 12 years. However, a key difference to note is that Vaillant boilers can be more expensive than their Worcester Bosch equivalents, but quotes will vary depending on which installer you are using. Worcester Bosch offers a 10-year guarantee on their boilers as standard, which means that they will replace or repair your boiler without requiring an inspection.
Worcester Bosch vs Ideal
Ideal Heating has been producing heating products for domestic and commercial markets since 1906. Today their product range includes gas boilers, heat pumps and heating controls.
Like Worcester Bosch, Ideal manufacture boilers that are also A rated for efficiency (although in terms of efficiency Worcester Bosch are slightly ahead) and include warranties of up to 10 years, but a key point of difference is that an Ideal boiler is typically cheaper to buy than a Worcester Bosch boiler.
Worcester Bosch vs Viessmann
Viessmann, established in 1917 and headquartered in Allendorf, Germany, produces heating equipment in 74 countries worldwide. While the brand is relatively new to the UK market, its boilers are gaining recognition for their energy efficiency and reliability. Currently, Viessmann’s most popular range is the Vitodens.
In terms of efficiency and longevity, there is not much to separate Worcester Bosch and Viessmann. However, Viessmann offer a standard warranty of 5 years parts and labour with their boilers, whereas Worcester Bosch offers between 7 and 12 depending on the model (if the boiler is installed by an accredited engineer).
In some cases, the Viessmann warranty can be extended to 10 years if installed by an accredited engineer. Of course, alongside Worcester Bosch’s longer warranty, high efficiency, and guarantee comes a higher price tag than Viessmann.
Worcester Bosch boiler installation
If you do choose Worcester Bosch and have decided upon your model, the next step will be the installation of your boiler.
Installation costs for a Worcester Bosch boiler
While installation costs will vary depending on the complexity of the work involved and the installer you choose, on average you should expect to pay between £1,200 and £1,900 for an engineer to install a Worcester Bosch boiler in your home.
Finding the right installer
When choosing an installer, it is essential to ensure that they are Gas Safe registered (or OFTEC registered in the case of oil boilers). It is illegal and highly dangerous for anyone other than a Gas Safe installer to carry out installation, maintenance or repairs on a gas appliance.
Next you may want to find an installer who is accredited by Worcester Bosch so that you can benefit from the longest warranty available to you.
Comparing quotes and installation costs
Finally, it is important to find and compare at least 3 different installation quotes from Gas Safe engineers. Comparing multiple quotes gives you the chance to ensure you are paying a fair price for the work. It is also worth asking to see customer recommendations and checking online review sites to ensure you have chosen a reputable installer.
Worcester Bosch boiler warranties
Buying a boiler is a significant expense, and not one that you want to be repeating on a regular basis. You also want peace of mind that if something goes wrong, you will receive speedy support to get your heating and hot water back on track. How does the Worcester Bosch warranty stack up?
Warranty coverage and duration
A key point of interest is that Worcester Bosch offers a 10-year guarantee on their boilers as standard, which is slightly different to a warranty.
Generally speaking, a warranty is only valid if the product has been installed according to terms and conditions, and you ensure that the boiler receives a professional service every 12 months. In addition, the warranty will specify which parts of the boiler are protected. In some cases, certain parts of the boiler will be protected for longer than others, e.g., the heat exchanger.
A guarantee means that Worcester Bosch will replace or repair your boiler without requiring an inspection. This means that for the first 10 years after your boiler has been installed, you will have peace of mind that any issues will be sorted free of charge.
How to extend your boiler warranty
If your boiler is installed by a Worcester Bosch accredited engineer, you will be able to enjoy the maximum warranty available on your model which will be between 7 and 12 years. In some cases, you may be able to purchase an extended warranty for an additional cost.
Worcester Bosch boiler reviews & customer feedback
As winners of Which? Best Buy boiler brand survey for the last 15 years, it’s no surprise that there is plenty of praise out there from customers and engineers. But are there any downsides to choosing a Worcester Bosch boiler?
Customer satisfaction and reliability
Owners of Worcester Bosch boilers often praise the reliability and high-quality of their products, describing them as working efficiently and quietly. Installation of Worcester Bosch boilers is quick (specifically relating to the Fast Track service) and their engineers receive positive comments for being professional and communicative.
Common pros and cons from real users
When breakdowns have happened, issues are resolved quickly and if protected by a warranty there is no hassle involved.
Of course, every brand runs into problems from time to time, and where negative customer reviews pop up, they express frustration with unreliable boilers, delayed repairs, poor warranty service, and inadequate customer support. Some felt misled about the terms and conditions of Worcester Bosch warranties and that the brand was poor at communicating with customers.
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Decision making tips for potential buyers
Key considerations before buying a Worcester Bosch boiler
Before committing to a Worcester Bosch boiler, it is important to consult with a qualified engineer and to compare multiple quotes. Engineers will be able to advise you not only of the right model for your home, hot water needs and budget, but also which brands can meet your needs.
Comparing Worcester Bosch with other brands
Here we compare the leading Worcester Bosch combi boiler, Greenstar, with comparable models from the other leading boiler brands.
| Brand | Average price excluding installation | ErP efficiency rating | Warranty |
|---|---|---|---|
| Worcester Bosch Greenstar 4000 | £1,200 | A – 94% | Up to 10 years |
| Vaillant EcoTec Plus 832 | £1,400 | A – 89.4% | Up to 10 years |
| Ideal Logic+ | £950 | A – 94% | 7-year parts and labour warranty & 10-year warranty on heat exchanger |
| Viessmann Vitodens 100-W | £1,500 | A – 94% | 7-year parts & labour warranty |
| Baxi 600 | £950 | A | 7-year parts & labour warranty |
| Alpha E-Tec NX | £800 | A | Up to 7 years |
| Glow-worm Energy | £1,100 | A | Up to 10 years |
When comparing Worcester Bosch with other brands, the manufacturer stands out for its long warranty options, energy-efficient boilers, and reputation for reliability.
There is no denying that Worcester Bosch boilers are at the top end in terms of price, and some customers report occasional delays when their boiler needs repairing, but the fact that the brand has topped the Which? Best Buy survey for more than 15 years should give you peace of mind.
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FAQs
What makes Worcester Bosch boilers a good choice?
Worcester Bosch is one of the leading brands in the UK. For many years the company has built a reputation on its reliable technology, energy efficiency, generous warranties and longevity. Worcester Bosch boilers are at the costlier end of the market, but as a long-term investment a Worcester Bosch boiler is worth it.
Are Worcester Bosch boilers reliable?
Worcester Bosch boilers do have a reputation for being reliable and durable, which has contributed to them being named Which? Best Buy boiler brand for 15 years.
How long do Worcester Bosch boilers last?
On average, well-maintained Worcester Bosch boilers should last at least 10 to 15 years, especially if they have been correctly installed and serviced to a high standard annually.
Do Worcester Bosch boilers come with a warranty?
Worcester Bosch boilers typically include a standard warranty of 5 years but extended warranties of up to 12 years are also available on some models. These warranties are usually only available if the boiler is installed by a Worcester Bosch Accredited Installer and you have registered the boiler with the manufacturer.
Where are Worcester Bosch boilers manufactured?
Worcester Bosch boilers are primarily manufactured in the United Kingdom at the company’s production facility in Derbyshire.
How much does a Worcester Bosch boiler cost?
The cost of a Worcester Bosch boiler is likely to fall between £800 and £2,500 depending on the type, model and size that you choose. You will also need to factor in the cost of installation which could be between £1,200 and £1,900.
What is the most powerful Worcester Bosch combi boiler?
The most powerful Worcester Bosch combi boiler is the Worcester Bosch Greenstar 8000 Life range. The most powerful model is the 35kW which has been designed for larger homes and those with higher heating and hot water demands.
Do Worcester Bosch boilers require annual servicing?
Like all boilers, Worcester Bosch boilers require annual servicing in order to maintain their energy efficiency which will keep heating bills low, to prevent any safety issues, and to maximise their lifespan. The manufacturer’s warranty may also be invalidated if regular servicing is not carried out.