Struggling to choose the right Worcester Bosch combi boiler for your home? With many models available, knowing which suits your property size, hot water needs, and budget can be complex. Whether upgrading an old boiler or installing one for the first time, making the right choice can save you money and energy in the long run.
This comprehensive guide compares the best Worcester Bosch combi boilers available, including their key features, energy efficiency ratings, prices, and performance. We’ll help you understand the differences between models like the Greenstar 8000 Life, Style, 2000, CDi Compact, and more—so you can find a boiler that meets your requirements.
If you’re unsure what type of boiler you currently have, we’ve also included helpful links to our system and regular boiler guides and tips on how to identify your boiler type.
Worcester Bosch is a leading name in the heating industry, known for its award-winning reliability and excellent customer satisfaction scores. So, whether you live in a small flat or a large home with multiple bathrooms, there’s a Worcester Bosch combi boiler that’s perfect for you.
Let’s find it.
A telling quote from the company’s founder Mr Robert Bosch (1861-1942), still informs how the company operates today:
“I have always acted according to the principle that I would rather lose money than trust. The integrity of my promises, the belief in the value of my products and in my given word have always had higher priority to me than a transitory profit.”
How many companies in modern society can say they hold themselves to the same principles Mr Bosch did?
It wasn’t until 1992 that the Bosch Group joined forces with Worcester to become Worcester Bosch. Not many companies have such a rich history as that of the Bosch Group & Worcester.
Worcester Bosch Greenstar 8000 Life combi boiler
The Worcester Bosch Life model is available as a combi and a system boiler. The first thing you notice about the Life boiler is that it looks like a giant iPhone rather than a boiler. Dubbed the ‘Beautiful Beast’, Worcester has clearly put a lot of effort into the design of the boiler.
The Worcester Bosch Life is a direct replacement for one of the most popular boilers on the market, the Worcester Bosch Greenstar CDi Classic. The Life features all the good stuff from the CDi Classic but with some added benefits:
- Most powerful wall hung Worcester Bosch boiler, with outputs of up to 50kW
- Updated controls that are easier to read and use
- Intelligent Filling System to maintain optimum pressure
- Compatible with wireless controls
- Runs quietly
- Outstanding build quality from a trusted manufacturer
- Looks beautiful mounted on your wall
Obviously having a great-looking boiler doesn’t mean much if it isn’t reliable and although it’s early in the boiler’s ‘Lifespan’, it looks like it will offer the reliability that’s come to be expected of the Worcester Bosch brand. It comes with a 10-year guarantee as standard, so Worcester feels that it’s reliable enough to back for a decent length.
The Life has been designed to fit in place of a kitchen cupboard so that it can be seen, but with its quiet running technology, it shouldn’t be heard (much). So if your boiler is on display then this is definitely the boiler for you.
Key Stats
Dimensions (mm): Height: 780mm | Width: 440mm | Depth: 365mm
kW Outputs: Available in 30kW, 35kW, 40kW, 45kW & 50kW outputs
ErP Rating: A Heat / A Water
Warranty: Up to 12 Years
Energy Efficiency: 94% – A Rated
Boiler Prices:
When looking at Worcester Bosch boiler prices, the Worcester Bosch 8000 Life boiler price is mid-range. Below is the average boiler price, based on a Greenstar 8000 Life 30kW.
| Worcester Bosch 8000 Life – Estimated Cost | |
|---|---|
| Typical Price (inc VAT)* | £1,200 |
| Typical Installation Cost (inc VAT) | £500 – £1,000 |
| Total Cost | £2,000 – £2,500 |
Worcester Bosch Greenstar 8000 Style combi boiler
The Style is the highest spec wall-mounted boiler on offer from Worcester Bosch, it offers all the same benefits that the Life model offers (see above) but it also offers a bit more.
It’s available in a high-gloss white or black finish and it features a full-colour touchscreen display, making it easier to see and it offers full explanations of any errors without the need to decode the error message in the handbook.
- The design-led approach makes it the best looking boiler on the market
- Highest hot water flow rates available
- The intelligent Filling System can regain the correct pressure if it drops for any reason
- Full-colour display
- Compatible with wireless controls
- One of Worcester’s quietest boilers
The Life, by comparison, is only available in white and doesn’t have a full-colour screen, it also doesn’t offer the same flow rates that the Style does.
Key Stats
Dimensions (mm): Height: 780mm | Width: 440mm | Depth: 365mm
kW Outputs: Available in 30kW, 35kW, 40kW, 45kW & 50kW outputs
ErP Rating: A Heat / A Water
Warranty: Up to 12 Years
Energy Efficiency: 94% – A Rated
Boiler Prices:
The Worcester Bosch Greenstar 8000 Style combi boiler is the most expensive boiler when looking at Worcester Bosch boiler prices.
| Worcester Bosch 8000 Style – Estimated Cost | |
|---|---|
| Typical Price (inc VAT)* | £1,300 |
| Typical Installation Cost (inc VAT) | £500 – £1,000 |
| Total Cost | £2,100 – £2,600 |
Worcester Bosch Greenstar 2000 combi boiler
The 2000 series of boilers is a scaled-back version of the LifeStyle series from Worcester Bosch. It features some of the same great design but at a lower (and more affordable spec).
The 2000 series is only available in a 25 & 30kW output, so it caters for the flats/smaller houses side of the market, whereas the LifeStyle models go up to 50kW which is suitable for very large houses.
- Worcester Bosch’s quietest combi boiler yet
- Perfectly designed to fit between kitchen cupboards
- Great value for such impressive build quality
- 10-year guarantee on the primary heat exchanger
- 5-year guarantee on the boiler
If you don’t have a high demand for heating/hot water then the 2000 series is an ideal option, offering an affordable way of enjoying the reliability and performance that Worcester has to offer without breaking the bank.
The 2000 boiler offers more limited compatibility with external controls (wireless controls/smart thermostats), so check before buying whether it’s compatible with what you currently have.
The Worcester Bosch 2000 is actually quieter than the Life & Style boilers but it offers reduced specs in terms of flow rate. The display is a simpler affair but it’s still a great boiler at an impressively low price.
Key Stats
Dimensions (mm): Height: 724mm | Width: 400mm | Depth: 300mm
kW Outputs: Available in 25kW & 30kW outputs
ErP Rating: A Heat / A Water
Warranty: Up to 6 Years (when fitted with a Worcester filter)
Energy Efficiency: 93% – A Rated
Boiler Prices:
The Worcester Bosch Greenstar 2000 is one of the cheapest Worcester Bosch combi boilers. The table below shows the boiler price based on a Worcester Bosch Greenstar 2000 30kW.
| Worcester Bosch Greenstar 2000 – Estimated Cost | |
|---|---|
| Typical Price (inc VAT)* | £850 |
| Typical Installation Cost (inc VAT) | £500 – £1,000 |
| Total Cost | £1,650 – £2,150 |
Worcester Bosch Greenstar CDi Compact combi boiler
The Worcester Bosch Greenstar CDi Compact, despite its lengthy name, is one of the most compact Worcester’s available. Designed to fit inside a kitchen cupboard space while offering great efficiency, the CDi Compact is a solid choice boiler.
- Compact combi boiler
- Comes with frost protection
- Low energy pump for reduced energy consumption
- A-rated – highest possible efficiency rating
- Lightweight can mount onto the wall
- Easy to service removable side panels
- Hot water delivered within 5 seconds
- Up to 10-year guarantee
- Excellent Which? review score of 75%
The CDi compact is available in 28, 32 & 36kW versions meaning there is a size to suit every kind of home. It’s basically a small boiler that packs quite a punch.
Key Stats
Dimensions: (mm): Height: 690mm | Width: 390mm | Depth: 280mm
kW Outputs: Available in 28kW, 32kW & 36kW outputs
ErP Rating: A Heat / A Water
Warranty: Up to 10 Years
Energy Efficiency: 94% – A Rated
Boiler Prices:
The Worcester Bosch Greenstar CDi Compact is only slightly less expensive than the Greenstar 8000 Style when comparing boiler prices. Below is the average boiler price for the Worcester Bosch Greenstar 28CDi Compact.
| Worcester Bosch Greenstar CDi Compact – Estimated Cost | |
|---|---|
| Typical Price (inc VAT)* | £1,000 |
| Typical Installation Cost (inc VAT) | £500 – £1,000 |
| Total Cost | £1,800 – £2,300 |
Worcester Bosch Greenstar Highflow CDi combi boiler
The Worcester Bosch Highflow range is available in the 440 CDi (29kW) and the 550CDi (30.6kW). They are both incredibly powerful floor-standing boilers suitable for larger domestic properties.
It is about the same size as a washing machine so it can be fitted underneath a kitchen counter or in a utility room. It also features frost protection so it can be installed in a loft or garage.
- Large Combi Boiler
- A-rated – highest possible efficiency rating
- Floor standing large boiler
- Suited to large home needs lots of hot water
- Strong flow rate on both models
- No water tank required
- Up to 10 years warranty
- Excellent Which? review score
There isn’t a great deal of selection in the floor-standing combi boiler range and as usual Worcester Bosch is one of the front-runners, creating a powerful and reliable range with the Greenstar Highflow.
Key Stats
Dimensions (mm): Height: 850mm | Width: 600mm | Depth: 600mm
kW Outputs: Available in 29kW & 30.6kW outputs
ErP Rating: A Heat / B Water
Warranty: Up to 7 Years standard (10 years guarantee with WarmZilla)
Energy Efficiency: 92% – A Rated
Boiler Prices:
The Worcester Bosch Highflow CDi Combi boiler is significantly larger in size than the rest of the Worcester Bosch combi boilers. For this reason, the boiler price is more expensive. Below is the average boiler price and installation cost of the Worcester Bosch Greenstar Highflow 440CDi.
| Worcester Bosch Greenstar Highflow CDi – Estimated Cost | |
|---|---|
| Typical Price (inc VAT)* | £2,130 |
| Typical Installation Cost (inc VAT) | £500 – £1,000 |
| Total Cost | £2,930 – £3,430 |
Worcester Bosch Greenstar Si Compact combi boiler
The Worcester Bosch Greenstar Si Compact combi boiler is suitable for small to medium-sized homes with one bathroom. It’s designed to fit inside a kitchen cupboard space so it’s ideal for properties where space is at a premium.
It’s the kitchen cupboard equivalent of the Worcester Bosch Greenstar I Series and as the winner of the Which? Best Buy for many years you know that it will perform.
- Fits in a standard kitchen cupboard
- User-friendly displays for ease of use
- Hot water can be adjusted to fine-tune your comfort
- A wide choice of controls enables greater comfort and economy
- Frost protection is included, reducing frost risk if installed in a garage or a loft
- Simple boiler control knobs with clear temperature display
- Low energy pump reduces electrical usage
- Instantaneous hot water, is always available
- Achieves an A+ ErP package efficiency rating for heating when installed with a smart internet-connected Bosch EasyControl
We don’t recommend the Si Compact if you have multiple bathrooms, live in a low water pressure area, or have a high water demand in your home. If you live in a flat or a smaller home then this boiler is a great choice.
Key Stats
Dimensions (mm): Height: 690mm | Width: 390mm | Depth: 280mm
kW Outputs: Available in 25kW & 30kW outputs
ErP Rating: A Heat / A Water
Warranty: Up to 10 Years
Energy Efficiency: 94% – A Rated
Boiler Prices:
Below, you can find the boiler prices, based on the Worcester Bosch Greenstar 30Si Compact.
| Worcester Bosch Greenstar Si Compact – Estimated Cost | |
|---|---|
| Typical Price (inc VAT)* | £1,160 |
| Typical Installation Cost (inc VAT) | £500 – £1,000 |
| Total Cost | £1,960 – £2,460 |
Worcester Bosch Greenstar I combi boiler
The Greenstar i range is the Worcester bread and butter range, the 25i is Worcester’s most popular boiler, and why wouldn’t it be?
It offers reliability, affordability, and great flow rates for an entry-level boiler. Sure, it’s not as sleek and fancy as the Worcester 8000 Life & Style boilers but it offers great value for money and it’s really user-friendly.
- Simple boiler controls with clear information display
- Condensate discharge resilient to freezing up to -15’C
- Wide choice of controls enables greater comfort and economy
- Low energy pump reduces electrical usage
- Hot water instantly heated from cold mains
- Achieves an A+ ErP package efficiency rating for heating when installed with a smart internet-connected Bosch EasyControl
The Greenstar i is available in both a 25 & 30kW output model with flow rates of 9 litres per minute and 10.8 litres per minute respectively. That might not mean much, but take it from us, that’s pretty good for this kind of boiler.
Key Stats
Dimensions (mm): Height: 710mm | Width: 400mm | Depth: 330mm
kW Outputs: Available in 25kW & 30kW outputs
ErP Rating: A Heat / A Water
Warranty: Up to 10 Years
Energy Efficiency: 93% – A Rated
The Worcester Bosch Greenstar i range is one of Worcester Bosch’s more budget-friendly priced boilers. We have attached a table below with the average boiler price of a Worcester Bosch Greenstar 30i.
It is important to note that the Worcester Bosch Greenstar i range will soon be directly replaced with the brand NEW Worcester Bosch Greenstar 4000, being released in May 2021.
| Worcester Bosch Greenstar i – Estimated Cost | |
|---|---|
| Typical Price (inc VAT)* | £1,075 |
| Typical Installation Cost (inc VAT) | £500 – £1,000 |
| Total Cost | £1,875 – £2,375 |
Worcester Bosch Greenstar CDi combi boiler (discontinued)
The Worcester Bosch Greenstar CDi combi boiler has now been discontinued and is no longer manufactured by Worcester as the CDi range has been replaced by more modern and efficient boiler ranges such as the LifeStyle.
The CDi range had a great run but all good things must come to an end. The CDi range is enjoying its retirement in the Bahamas with those cocktails made out of coconuts with lots of straws and fruit – well-earned CDi, have a fruity cocktail for us.
The CDi range was available in 27, 30, 37, and 42kW options, a range to suit flats, small and large homes.
Key Stats
Dimensions (mm): Height: 760mm | Width: 440mm | Depth: 360mm
kW Outputs: Available in 27, 30, 37 & 42kW outputs
ErP Rating: A Heat / A Water
Warranty: Up to 5 Years
Energy Efficiency: 90.3% – A Rated
Worcester Bosch Greenstar I Junior (discontinued)
The Worcester Bosch Greenstar i Junior range has been discontinued, it has been replaced with the i range. There was nothing wrong with the i Junior range, it was replaced by more efficient boilers that were smaller and quieter.
The Junior was available in a 24 & 28kW model, which was ideally suited for medium-sized properties. There was also an LPG model available for those living ‘off grid’.
Key Stats
Dimensions (mm): Height: 700mm | Width: 400mm | Depth: 330mm
kW Outputs: Available in 24 & 28kW outputs
ErP Rating: A Heat / A Water
Warranty: Up to 7 Years
Energy Efficiency: 89.1% – B Rated
Worcester Bosch Greenstar CDi Classic (discontinued)
The Worcester Bosch Greenstar CDi Classic has been discontinued by Worcester Bosch and replaced by slinkier models such as the Life and Style range, offering the same kW options in a nicer, more efficient package.
The CDi Classic was available in 29, 34, 38, and 42kW models. Making them ideal for medium to large size homes.
Key Stats
Dimensions (mm): Height: 700mm | Width: 400mm | Depth: 330mm
kW Outputs: Available in 29, 34, 38 & 42kW outputs
ErP Rating: A Heat / A Water
Warranty: 2 Years
Energy Efficiency: 92% – A Rated
Worcester Bosch Boiler Problems and Repairs
While Worcester Bosch boilers offer quality and reliability, things can still go wrong now and then. No boiler is immune from problems, which is why it’s so important that you have your Worcester Bosch boiler serviced every year.
If you’re experiencing an issue with your boiler, we have a blog that covers common boiler issues and how you can fix them.
Worcester Bosch Boiler Fault Codes
As with all appliances, over time, your boiler’s efficiency will naturally decline slightly, however, ensuring that your boiler has an annual service will help to prevent your boiler from suddenly breaking down on you, as well as expensive repair costs.
If your Worcester Bosch boiler develops a fault, the corresponding fault code or error code will usually appear on the boiler itself. The fault code should help your engineer to identify and diagnose any problems with your boiler so that they can resolve them as quickly as possible.
If your boiler is displaying a fault code, our guide to Worcester Bosch Boiler Errors and Fault Codes should help you find out what the code means.
Having looked at the prices for Worcester Bosch combi, system and regular boilers and the brand reviews, we can see that Worcester Bosch are very reliable, as you would expect from precision German engineering. We hope this blog has helped you find the perfect new Worcester Bosch boiler for your new home.
Worcester Bosch boilers on finance
Flexible Boiler Finance Options with WarmZilla
Investing in a new boiler is a significant decision, but with WarmZilla’s flexible finance plans, upgrading your heating system is affordable and straightforward. WarmZilla offers a range of financing options tailored to suit different budgets and preferences:
- 0% Interest-Free Credit: Spread the cost up to 24 months with 0% APR, making it easier to manage your finances without additional interest.
- Extended Finance Plans: WarmZilla offers financing options up to 10 years with competitive interest rates for those seeking lower monthly payments.
Eligibility Criteria:
To apply for finance with WarmZilla, applicants should:
- Be over 18 years old
- Work at least 16 hours per week or be retired with an income
- Be a UK resident with at least 3 years of address history
Even if you have a less-than-perfect credit history, WarmZilla’s finance providers have a high acceptance rate, making boiler financing accessible to more customers.
How to Apply:
- Get a Quote: Visit WarmZilla’s website and complete the quick survey to receive a personalized boiler quote.
- Choose Your Finance Option: Select the financing plan that best fits your budget, whether it’s the 0% interest-free option or an extended plan.
- Apply Online: Complete the straightforward online application process.
- Schedule Installation: Book a convenient installation date with WarmZilla’s Gas Safe registered engineers once approved.
For more details or to use WarmZilla’s finance calculator, visit their Boiler Finance page.
Disclaimer: Please note that some boiler models mentioned in this article may have been discontinued or replaced. All prices provided are estimates and are subject to change without prior notice. For the most accurate and up-to-date information, please contact us directly.
To find the best boiler model for your home and heating needs, we recommend completing our quick and easy online boiler survey. It only takes a few minutes and provides personalised recommendations.
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