Heatable uses cookies to give users the best possible experience.

View Policy

Black Friday Boilers
We've knocked £100 off, everything.

COVID-19 Notice
We're still installing boilers, safely. Read more.

Worcester Bosch Greenstar 8000 Life Combi Boiler Review: Big brand blockbuster?

Here, we take a deep-dive in to the reliability, performance and price point of this heating beast from the heating giants, Worcester Bosch. This is our review.

Worcester Bosch is one of the bestselling boiler brands in the UK and over the years that trust has been well earned. 

Not only did they rank #1 in our review of the best boiler manufacturers, but they have held the Which? Best Buy Award for 10 consecutive years. 

Worcester Bosch 8000 Logo

Their Worcester Bosch 8000 model is one of the brands premium offerings, so if you are looking for a central heating boiler that offers all of the latest and greatest features, as well as a slinky exterior design, then look no further. 

Worcester Bosch Greenstar 8000 Life Boiler Review 

In this 8000 Life boiler review, we've scored the 8000 in 4 key areas, including: 

  • Reliability: 5 Stars ⭐⭐⭐⭐⭐
  • Performance: 5 Stars ⭐⭐⭐⭐⭐
  • Warranty: 5 Stars ⭐⭐⭐⭐⭐
  • Price: 4 Stars ⭐⭐⭐⭐

The Worcester Bosch 8000 is essentially an upgrade on the award winning CDi Classic and is available as a combi boiler (most popular) or a system boiler. 

The 8000 is available in multiple sizes including 30kW, 35kW, 40kW and 45kW, along with an industry leading 10 year guarantee (not just a warranty) when purchased via Heatable

Want to know loads more about Worcester Bosch? Check out our complete guide to the brand.

Let’s take a close look at the 8000 and all that it has to offer….. 

Main features of the Worcester Bosch 8000 Boiler

Before we get into the details, here are some of the standout features of the Worcester Bosch Greenstar 8000 Life model:

  • Worcester Bosch’s most powerful wall hung combi boiler range
  • Ideal for larger homes with more than one bathroom
  • Easy access with removable side panels
  • 10-year guarantee on parts and labour
  • ErP rating 94%: A-rated
  • Dimensions: 780mm x 365mm x 440mm

Check the latest prices of the Worcester Bosch Greenstar 8000 Life


Reliability: 5/5 ⭐⭐⭐⭐⭐

Worcester Bosch 8000 Reliability Review

The Worcester Bosch 8000 combi boiler is a highly rated boiler, offering reliability and incredible value for money.

Trustpilot Reviews 

For illustration, on TrustPilot, Worcester Bosch has racked up an incredible amount of reviews. As of January 2021, over 17,000 customers left a review. Mind-bending.

Worcester Bosch 8000 TrustPilot Reviews

The brand has an average rating of 4.7 stars out of 5, incredible for a company selling in such huge volumes.

Moreover, in our article ranking the best boiler manufacturers, the brand was rated as offering the best combi boilers of 2021;  so, this is certainly a boiler brand with credibility.


If you are left wondering whether to choose between Viessmann and Worcester check out our recent comparison between the two brands.

Which? Boiler Survey Results 

Worcester have carried the Which? Best Buy Award for over 10 years now and being based in the UK also means parts are very easy to obtain and their customer service is superb.

Which? Best Buy Boiler

In fact, in the most recent annual boiler survey feedback was gathered from over 100 installers and received several high 5-star ratings the consumer choice organisation considers most important to consumers, including full marks for their build quality and availability of parts and spares.


Performance: 5/5 ⭐⭐⭐⭐⭐

Worcester Bosch 8000 Performance Review

Worcester Bosch 8000 Combi Boiler Power Outputs 

The Greenstar 8000 Life  combi boiler range is available in the following sizes (power outputs):

  • 30kW
  • 35kW
  • 40kW
  • 45kW

The 30kW combi boiler (most popular) has a heat output of 30kW and a flow rate of 10.7 l/min, making it suitable for average sized properties that may have slightly greater hot water demands. 

8000 WhiteThe 8000 range is also available in various other power outputs with corresponding flow rates, ideal for properties with greater hot water demands. 

The hot water flow rates range from 10.7 l/min up to 17.9 l/min, offering excellent pressure and capacity for any households that have a significant hot water demand. 

Want to know which boiler power is right for your home? Check out our boiler sizing guide.

You can check the latest deals on Worcester Bosch boilers here, and see how the brand compared to another market leader in our Worcester Bosch vs Vaillant Boilers comparison.  

Worcester Bosch Greenstar 8000 Life System Boiler

The 8000 range is also offered as a system boiler, this is a different type of boiler, ideal for homes with multiple bathrooms and hot water outlets. 

The system boiler is a wall hung unit available in either white or black and requires a separate hot water storage cylinder. 

The Greenstar 8000 Life System boiler is available in the following power outputs:

  • 30kW
  • 40kW
  • 45kW
  • 50kW

Which 8000 model is right for your home?

To determine which Worcester Bosch 8000 model is most suitable for your home’s needs, use our free tool. It'll do all the hard calculating work for you, and give a fixed price.

The type of 8000 that you'll need is based on several factors, but, to put it simply, less bathrooms = lower output, more bathrooms = higher output.

Efficiency of the 8000 Life

The Worcester Bosch Greenstar 8000 Life is certified with an A-rating for energy efficiency, with 94% energy efficiency.


The 8000 also includes Eco mode to save even more energy and money and can be paired with smart thermostats, such as Hive, Nest and even Worcester’s very own Bosch EasyControl. 

This allows you to control your boiler from a convenient smart phone app, allowing you to set-up schedules and gain access to a whole range of other energy saving features. 

Looking for a more budget-friendly model? Check out our review of the Worcester Bosch 2000 or if you're looking for a mid-range model check out the Worcester Bosch Greenstar 4000

Want to know how these boilers compare, check out our 2000 vs 4000 vs 8000.

Learn all about combi boilers in our what is a combi boiler guide and see how the brand fared against Baxi in our Worcester Bosch vs Baxi comparison. 

Controls & Features of the Greenstar 8000 Life

An impressive and unique feature of the Greenstar 8000 Life is the intelligent filling system. This means the boiler maintains optimum pressure without having to operate the filling link.

Bosch 8000 EasyControlThe 8000s modern aesthetic isn’t just superficial either, it features a user-friendly LCD display and easy to use push control buttons. It also features wireless connectivity, allowing you to connect the boiler to Bosch EasyControl and control the boiler remotely. 

The top and bottom panels of the boiler are also very easy to remove, making for a smooth and more convenient time when it comes to servicing, maintenance and if necessary repairs. 

In summary, the Worcester Bosch 8000 is one of the brands ‘premium’ combi boilers, as well as one of the most powerful, boasting A-rating efficiency, a user-friendly digital display and a reassuring Which? Best Buy Award.

Warranty: 5/5 ⭐⭐⭐⭐⭐

Worcester Bosch 8000 Warranty Review

Worcester Bosch Greenstar 8000 Life Guarantee

An essential component of buying a new boiler is the warranty or in the case of Worcester Bosch the far superior guarantee

...What’s the difference I hear you say?

Essentially, a guarantee is an agreement from the brand that they will attend your property and repair or replace the boiler within a reasonable timeframe. 

Most other brands just offer a warranty as standard, this is an agreement to investigate the problem, but is not an unconditional agreement to fix or repair it for free.

Worcester Bosch 8000 10 Year Guarantee

With the 8000 model, you will be securing an industry leading ten year guarantee on parts and labour (when purchased via Heatable), which offers you the added peace of mind if you decide to opt for the Worcester Bosch 8000.

Price Point: 4/5 ⭐⭐⭐⭐

Worcester Bosch 8000 Price

Worcester Bosch 8000 Combi Boiler Costs

It's a premium boiler, from a premium brand with premium features. Unfortunately, it comes at a premium price.

The exact costs of the boiler (including Gas Safe installation) may vary depending on your type of property, hot water demands and a whole host of other facts.


So, to make it easy, we have designed a quick questionnaire that will give you an instant fixed price. It takes about 60 seconds to complete.

Worcester Bosch 8000 Deals

However, as a guide, you should be looking to pay around £2,400 - £2,600 for the Worcester Bosch 8000 (if it's a simple combi boiler replacement).

For a conversion (or more complex installation), expect to pay around £2,800 - £3,500 (ish).

Again, every installation is unique and presents its own challenges. To get an accurate (fixed price) quote online, click here.


Our Verdict on the 8000

Worcester Bosch 8000 Verdict

The Worcester Bosch Greenstar 8000 Life is premium model offering all the greatest and latest features in a single unit. 

The 8000 is designed to replace the brands Greenstar CDi boiler and has made some major improvements.

Not only is it the brands most powerful boiler, but you benefit from the brands most recent innovations such as the intelligent filling system, ECO mode and wireless connectivity. 

Worcester Bosch 8000The boilers exterior is also a game changer, offering homeowners not only a boiler that works great, but one that looks great, quite easily the first wall-hung boiler that has a truly impressive aesthetic (available in both black, or white).

Check the latest price of the Worcester Bosch 8000 boiler

Finally, with the brand winning the Which? Best Buy Award for 10 years in a row, receiving extremely high TrustPilot reviews and offering an industry leading 10 year guarantee (not just a warranty), we fail to see any rivals catching up anytime soon.

Should you buy it? If you've got the budget, absolutely.

Looking for the best deal on a Worcester Bosch 8000? 

If so, get your new boiler installed with Heatable, here’s why: 

  • Gas Safe installation within 24 hours
  • Thousands of happy customers – an average score of 4.9 on Trustpilot (that’s better than the market leader).
  • Price match guarantee – if you find a cheaper quote, we will match (must be like for like)
  • Multiple payment options - interest free available
  • 10 year guarantee
  • Fixed price guarantee – no hidden costs
  • Save your quote until later

Use this clickable form to get a fixed price on the screen instantly.

More advice

New boiler deals

Buy your new boiler, better

Get a fixed price on a Which? Best Buy in minutes

Heatable is registered in England and Wales No. 08804726 (VAT No. GB205805920 ). Trading address is 1 Station Road, Great Sankey, Warrington, Cheshire, WA5 1RH. Heatable acts as a credit broker (not as a lender) and offers credit products through a panel of lenders. Heatable is authorised and regulated by the Financial Conduct Authority (reference no. 805259).

[1] Price based on a like for like combi swap in a 2 bed, 1 bathroom terraced home with a standard flue

[*] Installation dates are subject to installer availability

[ยน] only available on combi boiler installations

Financial Support: If you are in receipt of certain benefits, you may be entitled to claim a free boiler grant.