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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

We have rated this Worcester Bosch Greenstar 4000 12kW System boiler at 92.50% using the PlumbProud quality scoring system. To determine a rating, we weigh up a number of important considerations including the energy efficiency, estimated running costs, manufacturer's warranty, price of the boiler and more.

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.

For a free quote on the Worcester Bosch Greenstar 4000 12kW boiler and to get professional advice and guidance on whether it is the right choice for your home, please enter your postcode in the quote boxes on this page, click here to email us, or call us on 01604 343053.


Installed price around

£2,000

GET A COMPETITIVE BOILER QUOTE

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

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

The Worcester Bosch Greenstar 4000 12kW is a gas system boiler.

System boilers, like regular boilers, require a hot water cylinder (usually placed in a landing or airing cupboard) to work but they don’t require a separate cold water tank. This makes installation quicker and easier and, for homeowners with little loft space or who are considering a loft conversion, they're a more suitable choice.

System boilers don't need separate water tanks because they contain built-in circulating pumps that perform the same task. Just like heat only boilers, they require you to program in the times when you want heating and hot water to be available - they don't offer instant hot water like combi boilers. The cylinders keep whatever water they contain warm, although, if there is no hot water in the tank, you will have to wait up to an hour before hot water will come through your taps.

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

Selecting the right boiler for your home means choosing a boiler that is the right size. And, by size, we don't mean how big it is, we mean how powerful it is - the "output".

Your boiler’s output is a measurement of the power it has available to it to heat the water you need for your radiators or for when you turn on a tap, bath or shower. A higher output rate means it has more power and can heat more water.

It's important to choose an output that matches the demand for water in your home because if your boiler has too low an output, you'll often find only lukewarm water comes out of your taps or heats your radiators. If it’s too high, you’ll be paying more for your gas than you need to.

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

An experienced heating engineer would say that this Worcester Bosch Greenstar 4000 12kW System boiler's level of output makes it a suitable installation for smaller homes and apartments with up to 10 radiators and one bathroom.


What dimensions does a Worcester Bosch Greenstar 4000 12kW have?

The Worcester Bosch Greenstar 4000 12kW measures 724 mm in height by 400 mm in width by 310 mm in depth.

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

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

As more of us become concerned by the effects of climate change, the damage we do to the environment by heating our homes has emerged as an important issue for many homeowners.

Dangerous levels of nitrogen dioxide emissions in larger UK cities are caused by gas boilers in domestic properties, and 14% of the UK’s greenhouse gas production is as a result of central heating.

Do the available figures suggest that installing the Worcester Bosch Greenstar 4000 12kW system in your property would be an environmentally friendly choice?

All boilers manufactured after April 2018 in the UK must be rated as an “A” on the SEDBUK grading system, subject to a minimum energy efficiency rating of 92% or above. Before that, the minimum rate was 88% - boilers with an energy efficiency of 88% or 89% were given a “B” rating. Boilers scoring 90% or more were given an "A" rating.

The energy efficiency rating for a boiler describes the amount of energy it uses and how much goes to waste in operation.

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

The Energy Related Products Directive (ERP) came into force in 2015. This legislation was introduced to encourage manufacturers to create more energy-efficient products and it covers all products that consume energy during their lifetimes, including energy used during production and at the point of disposal.

The ERP assessors assigned a rating of "A" when testing the Worcester Bosch Greenstar 4000 12kW.

What is the warranty period on a Worcester Bosch Greenstar 4000 12kW system boiler?

The Worcester Bosch Greenstar 4000 12kW is covered by a parts and labour warranty of 7 years following installation.


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%

We have determined a rating of 92.50% for this Worcester Bosch Greenstar 4000 12kW System boiler using the PlumbProud quality benchmarking system. Factors used to score a boiler include its energy performance, how much it costs to run, the installation price, and how long the manufacturer's guarantee lasts.

This Worcester Bosch Greenstar 4000 12kW System boiler will cost around £2,000 fitted through PlumbProud where there are no complications during the installation.

If you would like to get in touch with us for a free quote and professional guidance and advice on whether the Worcester Bosch Greenstar 4000 12kW is the right choice for your home, you can do so by entering your postcode in the quote boxes on this page, calling us on 01604 343053 or you can click here to email us.


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

What type of boiler is the Worcester Bosch Greenstar 4000 12kW?

If you are considering installing a system boiler in your house or flat, then the Worcester Bosch Greenstar 4000 12kW boiler is certainly worth investigating.

System boilers, like regular boilers, require a hot water cylinder (usually placed in a landing or airing cupboard) to work but they don’t require a separate cold water tank. This makes installation quicker and easier and, for homeowners with little loft space or who are considering a loft conversion, they're a more suitable choice.

System boilers don't need separate water tanks because they contain built-in circulating pumps that perform the same task. Just like heat only boilers, they require you to program in the times when you want heating and hot water to be available - they don't offer instant hot water like combi boilers. The cylinders keep whatever water they contain warm, although, if there is no hot water in the tank, you will have to wait up to an hour before hot water will come through your taps.

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

It's best to choose a boiler whose size or "output" is right for your property. With boilers, however, size does not mean how big a boiler is, it means how much power it has.

A boiler’s output indicates the amount of power it can use when heating the water which it then sends to your taps and radiators. The higher the output rate, the more water it can heat.

If a boiler’s output is too low, there will be times when your hot water might not be as hot as you want it to be. If it is too high, you’ll likely be paying more than you need to for your gas.

Measured in kilowatts, the Worcester Bosch Greenstar 4000 12kW system's output level is 12 kW, so which types of property would this Worcester Bosch Greenstar 4000 12kW System boiler be an appropriate choice for?

An experienced Gas Safe engineer would be likely to recommend that this Worcester Bosch Greenstar 4000 12kW System boiler is capable of providing heating and hot water to up to 10 radiators and one bathroom and would therefore be most suitable for smaller homes and apartments.


The size of the Worcester Bosch Greenstar 4000 12kW

The Worcester Bosch Greenstar 4000 12kW boiler measures 724 mm [H] x 400 mm [W] x 310 mm [D] in size.

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

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

Environmentally-friendly heating has become an important issue for homeowners concerned about the accelerating pace of climate change.

In the UK, central heating is responsible for 14% of greenhouse gas production. Domestic gas boilers emit large quantities of nitrogen dioxide in British cities.

Will installing a Worcester Bosch Greenstar 4000 12kW system be a positive contribution to the environment? Let's see what the experts say.

All boilers manufactured and supplied in the UK are assigned two energy efficiency ratings. By law, they must achieve a SEDBUK "A" rating subject to a minimum efficiency level of 92%. Prior to that, the minimum was 88% (88% and 89% are equivalent to a SEDBUK "B" grade and 90% and above an "A" grade).

The ratings awarded to the Worcester Bosch Greenstar 4000 12kW are 94% with a SEDBUK rating of "A".

The ERP (Energy Related Products Directive) is European legislation that aims to reduce the use of energy at all points during a product's life, from the point of manufacture to when it's in active use right through to final disposal.

The regulation aims to encourage manufacturers to create products that are more environmentally friendly and which reduce gas emissions associated with those products.

The ERP grading for the Worcester Bosch Greenstar 4000 12kW is "A".

Is there a warranty on the Worcester Bosch Greenstar 4000 12kW system boiler if it breaks down?

You receive a parts and labour warranty of 7 years with the Worcester Bosch Greenstar 4000 12kW boiler.


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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