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Worcester Bosch Greenstar 4000 12kW boiler

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Plumbproud rating

92.50%

Worcester Bosch Greenstar 4000 12kW System Gas boiler

Our PlumbProud quality scoring system uses many different factors, such as price installed, manufacturer guarantees, energy efficiency and the likely cost of running, among others, to determine a boiler's value for money rating. This Worcester Bosch Greenstar 4000 12kW System boiler scores 92.50%.

We would expect this Worcester Bosch Greenstar 4000 12kW System boiler to cost £2,000 fully installed through PlumbProud, although it will cost more if the fit is complicated. We will provide you with a full quote before starting work, however.

You can speak to our friendly and professional advisors by calling 01604 343053. They can provide you with a free quotation on the Worcester Bosch Greenstar 4000 12kW boiler and confirm that it is suitable for your home. You can also click here to email us or enter your postcode into the quotation box on this page.


Installed price around

£2,000

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Worcester Bosch Greenstar 4000 12kW System Gas boiler frequently asked questions

Is the Worcester Bosch Greenstar 4000 12kW a system, regular or combi boiler?

The Worcester Bosch Greenstar 4000 12kW is an option you may wish to consider if you’re looking for a system boiler for your house or flat.

System boilers are very popular for properties with limited or no loft space or when homeowners want to keep the space for a loft conversion. This is because, unlike heat only boilers, they don’t require a cold-water tank - however, system boilers do need a hot water cylinder (often installed in an airing or landing cupboard).

Instead of the traditional cold-water tanks, system boilers use their built-in circulating pumps to heat the water needed for your taps and radiators. This also makes them an easier choice for engineers to install as there is one less large component to find space for and fit.

Like a regular boiler, you need to use a control panel to control a system boiler. Set the times when you want central heating and hot water to be available, such as in the morning when there might be greater demand for showers, and it will be there. Although hot water is not available on-demand like with a combi boiler, once the water has been heated it will stay in the hot water cylinder until it’s used up.

Should I choose a Worcester Bosch Greenstar 4000 12kW system boiler for my house or flat?

To determine that, we need to consider the size of the boiler. However, size doesn't refer to how big a boiler is - it means the size of its "output".

Your boiler’s output is a measurement of the power it has available to heat the volume of water required for your taps and radiators. The higher the output rate, the more water it can heat.

You need to be careful to select a boiler with the optimal level of output for your property though. That's because, if your boiler output is too low, your water and radiators will often not be as hot as you want them to be. If the output is too high, you’ll be paying more for gas than you need to.

The output of the Worcester Bosch Greenstar 4000 12kW system is 12 kW, so which types of property would this Worcester Bosch Greenstar 4000 12kW System boiler be appropriate for?

Most Gas Safe engineers would suggest that the most suitable type of property for installing a Worcester Bosch Greenstar 4000 12kW system boiler would be smaller homes and apartments with up to 10 radiators and one bathroom.


The size of the Worcester Bosch Greenstar 4000 12kW in millimetres

The dimensions of the Worcester Bosch Greenstar 4000 12kW are 724 mm [H] x 400 mm [W] x 310 mm [D].

Is the Worcester Bosch Greenstar 4000 12kW a condensing or non-condensing boiler?

How energy efficient is the Worcester Bosch Greenstar 4000 12kW system?

Many homeowners are now worried about climate change and the damage they do to the environment from heating their homes has become a subject of increasing concern.

Nitrogen dioxide emissions in Britain's largest cities are at dangerous levels and this has been caused by gas boilers. In fact, 14% of the UK’s greenhouse gases are produced by central heating.

Will choosing a Worcester Bosch Greenstar 4000 12kW system boiler for your home be positive for the environment? Let's examine the figures.

The Worcester Bosch Greenstar 4000 12kW has been awarded an efficiency rating of 94% and a SEDBUK band rating of "A".

In the UK, all boilers manufactured and supplied must have an energy efficiency rating of at least 92% or a SEDBUK "A" grade. Until April 2018, the minimum rating was 88% (88% and 89% are equivalent to a SEDBUK "B" rating and anything higher is rated "A").

A boiler's energy efficiency rating describes the amount of energy it uses and wastes when in normal operation.

Energy-efficient boilers help the environment as they require less fuel and emit fewer harmful gases. In 2015, the EU introduced the Energy Related Products Directive (ERP) with the aim of ensuring that all manufacturers, including boiler manufacturers, developed more efficient products and processes.

This legislation aims to conserve energy at all life cycle stages, from initial production through to actual use by a customer and up to the point of disposal.

The Worcester Bosch Greenstar 4000 12kW has been given an ERP rating of "A".

What length of warranty does the Worcester Bosch Greenstar 4000 12kW come with?

The Worcester Bosch Greenstar 4000 12kW boiler comes with a 7 year warranty for parts and labour.


Worcester Bosch Greenstar 4000 12kW Gas System boiler specifications

Powered by GasGas
LocationExternal
Efficiency rating94%
Band ratingA
P/L Warranty7 Years
Output in kW12 kW
Height724 mm
Width400 mm
Depth310 mm
MountingWall
ERP HeatA

The top 10 rated Gas System boilers

Using the Plumbproud scoring system, the current 10 ten Gas System boilers assessed using a number of important variables are as follows:

1Vaillant ecoTEC Plus 61295.72%
2Vaillant ecoTEC Plus 61595.20%
3Vaillant ecoTEC Plus 61894.37%
4Vaillant ecoTEC Plus 62493.33%
5Worcester Bosch Greenstar i System 9i92.89%
6Vaillant ecoTEC Plus 63092.75%
7Worcester Bosch Greenstar 4000 12kW92.50%
8Vaillant ecoTEC Exclusive IQ 62792.42%
9Vaillant ecoFIT Pure 61292.38%
10Vaillant ecoFIT Pure 61592.36%

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Worcester Bosch Greenstar 4000 12kW boiler

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Worcester Bosch Greenstar 4000 12kW System Gas boiler

  1. Home
  2. Worcester Bosch Greenstar 4000 12kW
Plumbproud rating for this boiler
92.50%

Our PlumbProud boiler quality benchmark tests score this Worcester Bosch Greenstar 4000 12kW System boiler at 92.50%. Several factors go into determining our rating including installation costs, manufacturer guarantees, energy efficiency, running costs, and more.

On a standard fit, we would expect this Worcester Bosch Greenstar 4000 12kW System boiler to cost you £2,000 supplied and fully installed by an experienced Gas Safe PlumbProud fitter.

We offer free quotes and professional advice and guidance on whether the Worcester Bosch Greenstar 4000 12kW is a suitable choice for your home via a phone call on 01604 343053. Alternatively, please click here to email us or enter your postcode in the quote boxes on this page.


Installed price guideline
£2,000

Get your free quote

Worcester Bosch Greenstar 4000 12kW Gas System boiler specifications

Powered by GasGas
LocationExternal
Efficiency rating94%
Band ratingA
P/L Warranty7 Years
Output in kW12 kW
Height724 mm
Width400 mm
Depth310 mm
MountingWall
ERP HeatA

Worcester Bosch Greenstar 4000 12kW System Gas boiler frequently asked questions

Is the Worcester Bosch Greenstar 4000 12kW boiler a standard, combi or system model?

The Worcester Bosch Greenstar 4000 12kW boiler is an option you may wish to consider if you're looking for a system boiler for your house or flat.

System boilers are suitable for homes with a higher-than-average demand for central heating and water - for example, larger homes and larger families.

Tell the boiler when you want hot water using the control panel - it draws water from the mains, heats it and keeps it warm throughout the day in the hot water cylinder. As long as you remember to tell the boiler when you want hot water, you have a big enough cylinder, and there's not an unusually high demand for water on a particular day, you should have hot water whenever you need it.

System boilers do not require a cold water storage tank either, unlike heat only boilers, meaning they're cheaper, quicker and easier to install.

Is the Worcester Bosch Greenstar 4000 12kW system boiler suitable for my house or apartment?

Whether this Worcester Bosch Greenstar 4000 12kW System boiler is right for your property depends on its size or what its "output" level is. Size does not mean its physical dimensions, however - it means how powerful it is.

The output rating indicates how much energy a boiler can use in providing you with hot water and heat when you need it from your radiators and taps. The greater the output, the more water it can heat.

It's better to take advice on this from a registered installer because, if your boiler output is too low, your water and radiators might not get as hot as you would like them to be. However, if the output level is too high, you'll end up paying more on your gas bills than you need to.

Which types of property would this Worcester Bosch Greenstar 4000 12kW System boiler be appropriate for given its output of 12 kW?

Most boiler engineers would recommend that a boiler with this output level would be most suitable for smaller homes and apartments with up to 10 radiators and one bathroom.


What size is the Worcester Bosch Greenstar 4000 12kW boiler?

The dimensions of the Worcester Bosch Greenstar 4000 12kW are 724 mm tall, 400 mm wide, and 310 mm deep.

Worcester Bosch Greenstar 4000 12kW – non-condensing or condensing?

Is the Worcester Bosch Greenstar 4000 12kW system considered environmentally friendly?

Concern for the environment is causing more and more homeowners to think about how they heat their homes and its impact on climate change.

In Britain's bigger cities, gas boilers, in particular, are responsible for dangerous levels of nitrogen dioxide emissions. Overall, 14% of all of the UK’s greenhouse gas production comes from heating our homes.

Would choosing the Worcester Bosch Greenstar 4000 12kW system be an environmentally-friendly choice? If so, let's look at its performance figures.

Boilers manufactured in the UK must be tested and, by law, achieve an energy efficiency rating of 92% or above, equivalent to a SEDBUK "A" grade. Most boilers achieve an "A" rating meaning they are at least 88% efficient.

The energy efficiency of a boiler indicates the amount of energy it uses (and wastes) during operation.

The Worcester Bosch Greenstar 4000 12kW has been assigned an efficiency rating of 94% with a SEDBUK rating of "A".

The Energy Related Products (ERP) Directive's aim is to reduce the harmful gas emissions created during a product’s manufacture and active end use right through to its disposal.

The ERP rating for the Worcester Bosch Greenstar 4000 12kW is "TBC".

What is the length of the warranty on the Worcester Bosch Greenstar 4000 12kW?

Worcester Bosch offers a parts and labour warranty of 7 years on the Worcester Bosch Greenstar 4000 12kW.


The top 10 rated Gas System boilers

Using the Plumbproud scoring system, the current 10 ten Gas System boilers assessed using a number of important variables are as follows:

1Vaillant ecoTEC Plus 61295.72%
2Vaillant ecoTEC Plus 61595.20%
3Vaillant ecoTEC Plus 61894.37%
4Vaillant ecoTEC Plus 62493.33%
5Worcester Bosch Greenstar i System 9i92.89%
6Vaillant ecoTEC Plus 63092.75%
7Worcester Bosch Greenstar 4000 12kW92.50%
8Vaillant ecoTEC Exclusive IQ 62792.42%
9Vaillant ecoFIT Pure 61292.38%
10Vaillant ecoFIT Pure 61592.36%
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