Worcester Bosch Greenstar 2000 vs 4000 vs 8000 Re March 1, 2023

Worcester Bosch Greenstar 2000 vs 4000 vs 8000


So, you’re in the market for a new Worcester Bosch boiler, huh? Well, you’ve certainly come to the right place! Choosing the perfect boiler for your home can be a daunting task, especially when there are so many fantastic options out there. But don’t fret because we’ve got you covered! 

We know that when it comes to boilers, the options can be overwhelming. There are so many different types, sizes, and features to consider – that’s why we’re here to break it all down for you in a way that’s easy to understand.

So, whether you’re looking for a compact and efficient combi boiler, a powerful system boiler, or a traditional heat-only boiler, we’ve got the inside scoop on all of Worcester Bosch’s offerings.

Now sit back, relax, and let’s dive into the wonderful world of boilers together!

About Worcester Bosch

Worcester Bosch is a well-respected brand in the heating industry, known for producing high-quality boilers that are reliable, energy-efficient, and easy to use. Founded in 1962 in Worcester, the company has grown to become one of the leading manufacturers of domestic boilers in the UK. 

Worcester Bosch offers a wide range of boilers to suit different homes and heating needs, including combi boilers, system boilers, and regular boilers. They are committed to innovation and have developed a range of cutting-edge technologies to make their boilers even more efficient, such as their Greenstar range which uses condensing technology to maximise efficiency and reduce energy waste. According to their website, Worcester Bosch boilers are energy-efficient, which can result in savings on heating bills, up to £340 per year.

The brand has received numerous accolades for its products and customer service, including being awarded the Queen’s Award for Enterprise in Innovation and the Which? Best Buy award. Worcester Bosch has also received praise for their customer service and aftercare, reflected in their high Trustpilot score of 4.6/5. Their customers are consistently pleased with their boiler’s performance and the quality of their service. 

In a nutshell, Worcester Bosch has a strong reputation for providing excellent aftercare and customer support, ensuring customers have peace of mind and confidence in their products.

The difference between Worcester Bosch 2000, 4000 and 8000

First things first, these three models look very similar, but when you dig deeper, these are the differences.

Worcester Bosch 2000 is the affordable version, it’s the most compact boiler within the range, which makes it the ideal size for kitchen cupboard installation.

The 4000, on the other hand, is slightly more expensive and bigger in size, which makes it more powerful to serve slightly larger homes. The 4000’s warranty is longer than 2000 for additional peace of mind, and its energy efficiency rate is slightly higher, which can save you more money on your heating bills.

While the Worcester Bosch 2000 only comes in a combi type, the 4000 comes in a combi and system type, and the 8000 comes in a combi, system or regular boiler type.

Worcester Bosch 8000 is Greenstar’s premium model, it comes in various sizes, has higher heat output, and has bigger dimensions – which makes it ideal for huge homes with multiple bathrooms. The Worcester Bosch 8000 has the same long warranty as the 4000 model and can be bought in white or black to fit any home aesthetics. 

Now let’s delve into the boiler’s tech specs.

Worcester Bosch 2000

WB 2000

The Worcester Bosch 2000 Technical Spec

  • Efficiency: A-rated (93%)
  • Heating output: 25kW & 30kW
  • Suitable for: small and medium homes with one bathroom
  • Boiler type: Combi
  • Price point: Starts from £2100 – The most affordable WB boiler 
  • Warranty: 5-year guarantee

The Worcester Bosch 2000 is a high-quality gas boiler designed to be efficient, reliable, and easy to use. It is a perfect choice for small to medium-sized homes and can be installed in various locations, including kitchens and utility rooms. 

One of the key features of the Worcester Bosch 2000 is its compact size, which makes it perfect for flats and homes with limited space. Despite its size, the Worcester Bosch 2000 is a powerful boiler, providing heating and hot water on demand, and it boasts an A-rated efficiency, meaning that it can help to reduce your energy bills.

The Worcester Bosch 2000 series is only available as a combi boiler. 

The 2000 is also easy to use, with a simple control panel that allows you to adjust the temperature and heating settings with ease. It is also compatible with a range of smart controls, such as the Bosch EasyControl, allowing you to control your heating using your smartphone or tablet remotely.

In terms of reliability, the Worcester Bosch 2000 is built to last, with high-quality components and a robust design designed to withstand daily use. It also comes with a comprehensive warranty, giving you peace of mind and confidence in your purchase.

Worcester Bosch 4000


The Worcester Bosch 4000 Technical Spec

  • Efficiency: A-rated (94%) 
  • Heating output: (Combi 25kW, 30kW) and (system 12kW, 15kW, 18kW, 21kW & 24kW).
  • Suitable for: Small and medium homes. 
  • Boiler type: Combi and System boilers
  • Price point: Mid-range prices (Combi from £2200) and (System from £2240)
  • Warranty: 10-year guarantee

The Worcester Bosch Greenstar 4000 is a top-of-the-line gas boiler that is designed for efficiency, reliability, and ease of use.

The Worcester Bosch Greenstar 4000 is a highly efficient gas-fired condensing boiler designed to provide your home with reliable and affordable heating and hot water. It has been engineered to deliver exceptional performance, high energy efficiency, and low emissions, making it an excellent choice for those who want to reduce their carbon footprint and save on energy bills. Saving the planet and the pennies!

The Greenstar 4000 features a sleek and modern design that blends seamlessly into any home decor, and it is available in a range of sizes to suit different heating and hot water needs. It is also packed with advanced features, including a powerful modulating pump that ensures optimum efficiency and performance, a high-efficiency heat exchanger that maximises heat transfer, and a user-friendly control panel that allows you to adjust settings and monitor performance.

One of the key benefits of the Greenstar 4000 is its outstanding efficiency, which is up to 94% –  meaning this boiler can help you save up to 30% on your energy bills compared to older, less efficient boilers, while also reducing your carbon footprint – because we’re all feeling the pinch these days! 


The 4000 is also compatible with a range of smart controls, such as the Bosch EasyControl, which allows you to remotely control your heating and hot water using your smartphone or tablet. So you can turn up the heat on your way home with no hassle! 


The Greenstar 4000 is also designed for easy installation, maintenance, and servicing, with simple and intuitive controls, easy access to components, and a modular design that allows for flexible installation – that’s why our engineers love servicing this boiler.

Worcester Bosch 8000 (Life and Style)

WB Style black 30kw

The Worcester Bosch 8000 Technical Spec

  • Efficiency: A-rated (94%) 
  • Heating output: Ranging from 30kW to 50kW. 
  • Suitable for: medium-large homes. 
  • Boiler type: Combi, System and conventional boilers
  • Price point: From £2,749 
  • Warranty: 10-year guarantee
  • Colour: White (Life) or black (Style)

The Worcester Bosch 8000 is a top-of-the-line gas-fired boiler designed to provide efficient and reliable heating for homes of all sizes. It is part of Worcester Bosch’s flagship range of boilers and is packed with advanced features and technology to help you save money on your energy bills while reducing your carbon footprint. So it’s great for the environment and your wallet too! 

One of the standout features of the Worcester Bosch 8000 is its efficiency. It has an A-rated efficiency rating of 94%, which means it converts a high percentage of the fuel it uses into heat – this can result in significant savings on energy bills compared to older, less efficient boilers.

The Worcester Bosch 8000 is also highly versatile, with a range of different models available to suit different types and sizes of homes –  including models that can be installed in a variety of locations, such as the kitchen or utility room, as well as models that are designed to be used with renewable energy sources such as solar panels or heat pumps.

Other features of the Worcester Bosch 8000 include a user-friendly control panel that makes it easy to adjust the temperature and settings, as well as advanced safety features such as overheat protection and a built-in frost protection system. It also comes with a 10-year warranty period for added peace of mind and a signal of trust.

Bosch EasyControl

The Bosch EasyControl is like having your own personal temperature genie! It’s a super-smart thermostat that lets you control the temperature of your home with just a few taps on your phone. You can even adjust the heat when you’re out and about, so you’ll always be greeted by a cosy home. 

No more fumbling around with confusing controls or trying to decode complicated instructions! The EasyControl app is super easy to use – you can set up schedules and routines that fit your lifestyle. You can also check the weather outside and adjust the heating accordingly. 

When you open a window to let in some fresh air, Bosch EasyControl is clever enough to turn off the heat to save energy. How cool is that!

The best part? The Bosch EasyControl is compatible with lots of different heating systems, so it’ll work for almost any home. Whether you’ve got a gas, oil, or heat pump system, EasyControl is the perfect way to get the most out of your heating.

And don’t worry, Bosch EasyControl has got your back when it comes to safety – it’s got overheat protection to make sure things don’t get too hot and a child lock to keep little fingers from tinkering with the controls.

So, say goodbye to chilly homes and hello to the warm and cosy comfort of the Bosch EasyControl! It’s like magic, but better – because it’s real!

Final Verdict

Let’s skip to the good part, which Worcester Bosch Greenstar should you get? Here’s our personal (and professional) advice;

If you’ve got a relatively small-medium home and are on a budget, opt for the Worcester Bosch 2000.

For small-medium homes with more demand for hot water and heating, get the Worcester Bosch 4000 and enjoy its higher efficiency rating and longer warranty.

And if you live in a medium-large home and would like the added efficiency rate and heat output, the Worcester Bosch 8000 is the right choice for you.

Still in doubt? Chat with our heating experts on live chat, they’ll be able to recommend the best boiler for your home.

Worcester Bosch boilers on finance

When you get a Worcester Bosch boiler from WarmZilla, you can spread the cost of your new boiler over time. 

You can select our interest-free finance option (0% APR) over 24 months or up to 10 years (11.9% APR) if you want to get those monthly payments right down. 

No more shelling out a huge chunk of change all at once. Instead, you can pay as little as £14 a month and enjoy your brand-new Worcester Bosch Greenstar boiler. 

And let’s be real, who doesn’t love the idea of saving money? With a new Worcester Bosch boiler, you could save up to £840 a year on your energy bills, when you upgrade your old inefficient boiler to a new Worcester Bosch Greenstar A-rated boiler (according to the Energy Saving Trust).

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