Worcester Bosch Greenstar 4000 Boiler Review - Updated 2021 Version!
Worcester Bosch Greenstar 4000 Boiler Review - Updated 2021 Version!

Worcester Bosch Greenstar 4000 Boiler Review - Updated 2021 Version!

If you are looking for a boiler that is efficient enough for your home, maybe it's time to choose the Worcester 4000 with 2021 technology instead of an outdated and old technology boiler product, what do you say? Worcester Bosch is one of the first brands that come to mind when it comes to boiler brands serve in the UK. We, as Zara Heating, offer combi boilers of this brand at affordable prices and additional warranty period opportunities with the promise of safe installation. By taking advantage of these, you can bring the latest and greatest technology to your home, and you can easily start to benefit from the heated atmosphere & water.

In the continuation of our content, we will examine the Worcester 4000 model with all its features. By reading the rest of the article, you can find the best combi boiler for your home. Before we start: Do you need support in the repair, purchasing or installation of your Worcester branded or different brand boiler? Then we recommend that you contact Zara Heating experts immediately. As Zara Heating, we are members of Gas Safe. This means a team with extra training regarding the installation process and repair and installation that will take place in a completely safe way. You can contact us to discover more, decide which boiler is the most suitable for your home and ask your questions.

Worcester Bosch Greenstar 4000: Features and Technology

Worcester Bosch Greenstar 4000 insists on being one of the most reliable faces in the market in terms of overall performance, warranty process fee efficiency ratio and reliability.

This new model, which has a full ten-year labour and parts warranty, appeals to large families, those who want to choose a device with low carbon emissions and those who seek quality and durability in the boiler. Worcester Bosch Greenstar 4000, one of the prominent gamers in the market, is the world-known brand's product defined as "middle-class boiler" by many. This means that those who want to buy a quality boiler at a mid-range price often prefer Worcester.

The Worcester Bosch Greenstar 4000 is currently available in two sizes: 25 and 30kW. Depending on factors such as the size of your house, the number of bathrooms or radiators, you can easily choose one of these models. Both versions of the product are covered by a comprehensive 10-year warranty.

If you're ready, let's start exploring the highlights of the Worcester Bosch Greenstar 4000 together.

Power Features of Worcester Bosch 4000

The Worcester Bosch 4000, with its new generation power options, is a tool that can provide great performance for a large family, a medium house with multiple bathrooms. There are two different versions of the product:

25 kW and 30 kW. Let's examine these versions together:

  1. Worcester 4000 with 25 kW: This device with a heat output of 25 kW offers a flow rate of 10.5 litres per minute. This flow power makes the product particularly suitable for small one-bathroom apartments and properties. The new generation silent technology of the device also makes it suitable for small apartments.
  2. Worcester 4000 with 30 kW: This model, which works with 5 kW more power than the other model, can provide a water flow of 12.3 litres per minute. The product can be quite suitable for medium-sized, two-bath houses. The 30 kW version is generally recommended for families with children.


Thinking of purchasing The Greenstar 4000 System boiler? In this case, you can benefit from many more kW options. Contact Zara Heating and let's see which 12, 15, 18, 21 and 24 kW options suit you best.

Frost Protection Technology

Like almost all Worcester products, the Worcester 4000 has frost protection technology. This will ensure that cold air does not adversely affect its operating performance, even if you install the device in uninsulated rooms or parts of your home. The fact that the internal parts of the device do not experience frost conditions allows the durability and performance to be high in all seasons. It also contributes to efficiency by preserving the performance of device parts.

Eco-Mode - Nature-Friendly Boiler by Worcester

The Worcester Bosch 4000 Combi Boiler has an additional eco feature to help you reduce the burden of your bills. This user-friendly eco feature helps lower carbon emissions while keeping productivity high and reducing expenses. That's why the boiler combi counts as your long-term investment!

Compact & Updated Design by Worcester

The elegance of the classic Worcester combi boilers has been made much more compact and modern in the Worcester Bosch 4000 Combi Boiler. Having a rounded design, the device will not look rough even when you install it close to your living spaces. In the new face of life, aesthetics is at least as important as functionality, isn't it?

Side Panel Technology for Easily Solving Errors

Zara Heating, a member of Gas Safe, can easily hack into your combi's brain if it fails.

How Does?

Thanks to the side panel technology!

Engineers will have easy access to your combi, which you have serviced annually to validate your warranty, thanks to the side panel. While this shortens the maintenance period, it also means being able to solve the problems that will occur during maintenance faster without the mess. Efficiency seems high in every way, right?

Filling System is Intelligent – Control Your Boiler’s Pressure Level

The pressure of your boiler is among the most important factors affecting the performance and efficiency of your boiler. In order to keep it at the optimal level, it is necessary to keep the filling system under control. Thanks to its smart filling system, special sensors and software, it fills at the right rate at the right time and keeps the pressure in the boiler at an optimal level. If the pressure drops at any point, this situation is automatically detected by the system and a warning is generated. This helps in resolving situations that may cause problems in the longer term. Isn’t it great?

Advanced Control Systems

Greenstar 4000, which will work in full compatibility with the controls released by Worcester, brings convenience. With almost all the Worcester control systems you know, you can determine the performance and working processes of your combi boiler. Here are those controls:

  1. EasyControls
  2. Comfort+ RF
  3. Comfort+ Stats RF
  4. Comfort +
  5. MT20


Worcester Greenstar 4000 Warranty Period and Coverage

If you want to buy Greenstar 4000 with the installation of Gas Safe member engineers through a reliable company, you are at the right place. By contacting Zara Heating experts, you can quickly and easily complete your shopping and request secure installation. Remember, the required warranty period will only apply when you work with trained installation specialists. Therefore, we recommend that you do not work on your boiler with people who are not qualified enough.

If you contact us, we can offer additional opportunities and maintenance benefits beyond the 10-year warranty period. Get an offer for this now. It can also give you detailed information about the price of the product including Installation. We are sure you will find the most competitive prices on the market here.

All labour and parts issues are covered by the warranty offered by Worcester Bosch 4000. In this way, you will not have to pay any money for device-related malfunctions of the boiler for 10 years.

The Highest Efficiency for Everyone: %94

This new generation product, which is evaluated in the A energy class, provides 94 per cent efficiency according to studies. You can always rely on ErP ratings. If you use this device by integrating it with smart thermostats and phones, you will have the chance to get detailed information about the periodic expenditure history and performance. This will help you control bills with performance and efficiency. Contact now to get a super reliable service and a Worcester combi boiler price quote!

Compact Design & Size: Can Be Installed Anywhere!

Compact design is very important in combis, which are especially suitable for small houses. The Worcester 4000 combi is also ready to fit anywhere with its compact structure. Dimensions are only H 710 x W 400 x D 310. So you will be able to place it easily even inside your kitchen cabinet.


See the other combi boilers, review them and start deciding which is the best for your home:

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