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Worcester Bosch Greenstar 8000 Style 40kW boiler

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Plumbproud rating

89.77%

Worcester Bosch Greenstar 8000 Style 40kW Combi Gas boiler

We have awarded this Worcester Bosch Greenstar 8000 Style 40kW Combi boiler a rating of 89.77% in our boiler quality benchmark tests. To determine a score for each boiler, we factor in several different points of comparison including energy efficiency, manufacturer guarantees, estimated running costs, price and more.

On straightforward installations, we would expect to charge you £2,600 for this Worcester Bosch Greenstar 8000 Style 40kW Combi boiler fully installed.

If you would like a free quote and professional advice and guidance to help you decide if the Worcester Bosch Greenstar 8000 Style 40kW is the right choice for your home, please get in touch. You can do this by entering your postcode in the quote boxes on this page, click here to email us or give us a call on 01604 343053.


Installed price around

£2,600

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Worcester Bosch Greenstar 8000 Style 40kW Combi Gas boiler frequently asked questions

What type of boiler is the Worcester Bosch Greenstar 8000 Style 40kW?

Looking for a gas combi boiler for your flat or house? Then the Worcester Bosch Greenstar 8000 Style 40kW may be an option you should consider.

In the past, most boilers needed one or more storage tanks to operate - one to store warm water and the other for storing water to be heated later. But storage tanks are problematic in properties where space is at a premium and particularly where there is no loft. Many properties in the UK are small and so manufacturers introduced combi boilers in the 1970s to eliminate the need for tanks.

With a combi boiler, the hot water for your radiators and taps is delivered on demand. The boiler instantly heats water it draws directly from the mains internally. It then distributes the heated water around your home at mains pressure as you need it.

It is important to bear in mind that, while combi boilers have many benefits, they can only heat a certain volume of water at any given time. This means that, if you run a shower at the same time as someone else is doing the washing up in the kitchen, the volume of water passing to each point will drop, causing a fall in pressure.

Is a Worcester Bosch Greenstar 8000 Style 40kW combi boiler right for my house or apartment?

Whether this Worcester Bosch Greenstar 8000 Style 40kW Combi 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 8000 Style 40kW Combi boiler be appropriate for given its output of 40 kW?

A PlumbProud heating engineer would recommend that this Worcester Bosch Greenstar 8000 Style 40kW Combi boiler be installed in larger properties including detached homes with 15 or more radiators and two or more bathrooms.

With all combi boilers, you need to consider the "flow rate" as well as the output rate when making your decision.

Like all combi boilers, the Worcester Bosch Greenstar 8000 Style 40kW draws water from the mains. It instantly heats that water and then distributes it to the parts of your home which need it - taps, radiators, bathrooms, and so on. This Worcester Bosch Greenstar 8000 Style 40kW Combi boiler's flow rate is 14 L/m.

There is no benefit to purchasing a boiler with a high flow rate if the local water pressure is not that good - a high flow rate doesn't mean that your combi can draw more water from the mains.

In addition, if you live in a home with a large number of radiators and more than one bathroom and if more than one person regularly wants to use hot water at a time, a combi boiler may struggle to provide enough water at a hot enough temperature.

When our engineer comes out to quote you, they may recommend that you choose a heat only boiler or system boiler instead if your family's demand for hot water is higher than normal.


Dimensions of the Worcester Bosch Greenstar 8000 Style 40kW boiler

The Worcester Bosch Greenstar 8000 Style 40kW boiler is 825 mm high, 440 mm wide, and 365 mm deep.

Worcester Bosch Greenstar 8000 Style 40kW – non-condensing or condensing?

We recommend that you select a condensing boiler like the Worcester Bosch Greenstar 8000 Style gas Worcester Bosch Greenstar 8000 Style 40kW for your home if possible because of the environmental benefits and the money you'll save on your gas bills.

Condensing boilers are much more energy-efficient than older, non-condensing models as they capture and recycle the heat still present in the water vapour condensation and flue exhaust gases that your boiler creates when burning gas for reuse.

How energy efficient is the Worcester Bosch Greenstar 8000 Style 40kW combi?

How we heat our homes is an issue which many homeowners worry about as the world combats climate change and environmental damage.

Central heating accounts for 14% of greenhouse gas emissions in the UK. In larger British cities, gas boilers emit dangerous levels of nitrogen dioxide into the atmosphere.

Would choosing the Worcester Bosch Greenstar 8000 Style 40kW combi be an environmentally-friendly choice? If so, let's look at its performance figures.

By law, the minimum level of energy efficiency for boilers manufactured in the UK is 92%, equivalent to a good SEDBUK “A” rating. Prior to April 2018, the minimum was 88% - boilers whose energy efficiency levels were 88% or 89% were given a "B" rating on the SEDBUK scale and those at 90% or higher were given an "A".

The energy efficiency rating awarded to each boiler indicates the amount of energy that is wasted when in operation.

Following testing, the Worcester Bosch Greenstar 8000 Style 40kW was given a 94% energy efficiency rating and a SEDBUK grading of "A".

The ERP (or Energy Related Products Directive) is a European regulation governing products which require energy to operate throughout their lives and encourages manufacturers to create products that are more environmentally friendly.

The legislation is designed to reduce the potential for harmful gas emissions during manufacturing and actual use right through to the point of final disposal.

For the Worcester Bosch Greenstar 8000 Style 40kW, the ERP rating is "A" for heat and "A" for hot water production.

How many years does the warranty period cover on a Worcester Bosch Greenstar 8000 Style 40kW boiler?

Worcester Bosch’s Greenstar 8000 Style 40kW boiler includes a parts and labour warranty of 8 years.


Worcester Bosch Greenstar 8000 Style 40kW Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty8 Years
Output in kW40 kW
Height825 mm
Width440 mm
Depth365 mm
MountingWall
Flow rate14 L/m
ERP HeatA
ERP WaterA

The top 10 rated Gas Combi boilers

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

1Vaillant ecoTEC Plus 82593.35%
2Vaillant ecoTEC Plus 83292.98%
3Worcester Bosch Greenstar 2000 25kW92.89%
4Viessmann Vitodens 050-W 29kW92.66%
5Vaillant ecoTEC Plus 83592.60%
6Worcester Bosch Greenstar CDi Compact 2892.57%
7Vaillant ecoFIT Pure 82592.39%
8Vaillant ecoTEC Plus 83892.16%
9Vaillant ecoTEC Exclusive IQ 83591.90%
10Vaillant ecoTEC Pro 2491.77%

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Worcester Bosch Greenstar 8000 Style 40kW boiler

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Worcester Bosch Greenstar 8000 Style 40kW Combi Gas boiler

  1. Home
  2. Worcester Bosch Greenstar 8000 Style 40kW
Plumbproud rating for this boiler
89.77%

We score each boiler we sell by considering a number of different factors including price installed, manufacturer guarantees, energy efficiency, the likely cost of running, and more. For this Worcester Bosch Greenstar 8000 Style 40kW Combi boiler, we have awarded a rating of 89.77%.

This Worcester Bosch Greenstar 8000 Style 40kW Combi boiler will cost around £2,600 fitted through PlumbProud where there are no complications during the installation.

Get a better understanding of installation costs for the Worcester Bosch Greenstar 8000 Style 40kW by entering your postcode in the box supplied on this page. You can also call our professional team with any boiler-related queries on 01604 343053. Alternatively, please click here to email us.


Installed price guideline
£2,600

Get your free quote

Worcester Bosch Greenstar 8000 Style 40kW Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty8 Years
Output in kW40 kW
Height825 mm
Width440 mm
Depth365 mm
MountingWall
Flow rate14 L/m
ERP HeatA
ERP WaterA

Worcester Bosch Greenstar 8000 Style 40kW Combi Gas boiler frequently asked questions

Is the Worcester Bosch Greenstar 8000 Style 40kW boiler a combi, regular or a system boiler?

The Worcester Bosch Greenstar 8000 Style 40kW is worthy of consideration if you're looking for a combi boiler for your flat or house.

One of the reasons the combi boiler was introduced to Britain in the 1970s was because residential properties are among the smallest in the world. More traditional boilers require one or more large tanks to be stored around the home to function.

A combi boiler is a self-contained unit that draws water from the mains then heats and distributes it instantly and on demand - no tanks are needed.

They are the most popular type of boilers in the UK and offer only one major disadvantage - there is a maximum volume of water that can be heated at any one time. If that limit is exceeded by, for example, two people using a hot water tap at the same time, there will be a drop in water pressure, temperature and volume to both taps.

Is the Worcester Bosch Greenstar 8000 Style 40kW combi boiler a suitable choice for my property?

It's best to choose a boiler whose size or "output" is right for your home.

The more hot water and heat you want, the higher the output level of your boiler should be. Output is measured in kilowatts and it describes the maximum level of power your boiler has to heat water.

If your output level is too low, your boiler will not have the power it needs to get your water as hot as you want it, particularly when there's a lot of demand for it. Choose a boiler whose output level is too high and you'll have all the hot water you need but will be paying too much for it through higher gas bills.

Which types of property would this Worcester Bosch Greenstar 8000 Style 40kW Combi boiler be appropriate for given its output of 40 kW?

A PlumbProud heating engineer would recommend that this Worcester Bosch Greenstar 8000 Style 40kW Combi boiler be installed in larger properties including detached homes with 15 or more radiators and two or more bathrooms.

Flow rates are important when choosing a combi boiler as well as output rates.

A combi boiler's flow rate (measured in litres per minute) describes how much water it can instantly heat then distribute to the taps and radiators in your home - you will need to factor this into your decision on a new combi boiler. This Worcester Bosch Greenstar 8000 Style 40kW Combi boiler's flow rate is 14 L/m.

If you have a lot of radiators and bathrooms in your home and there's lots of demand within your household for hot water at the same time (like morning or evening showers and baths), you'll need a boiler with a high flow rate.

However, it's not quite that simple. If your local mains water pressure is low, you're not going to gain any benefit from choosing a combi boiler with a high flow rate because that higher flow rate doesn't mean it can draw more water from the mains pipes.
When our engineer comes out to quote you, they may recommend that you choose a heat only boiler or system boiler instead if your family's demand for hot water is higher than normal.


The size of the Worcester Bosch Greenstar 8000 Style 40kW

The Worcester Bosch Greenstar 8000 Style 40kW has the following dimensions - 825 mm high, 440 mm wide, and 365 mm deep.

Worcester Bosch Greenstar 8000 Style 40kW – condensing or non-condensing?

We always recommend to clients that they select the very latest condensing boiler for their home.

Condensing boilers like the Worcester Bosch Greenstar 8000 Style 40kW are more efficient with the gas they use in operation, meaning that you'll benefit from lower fuel bills. Condensing boilers are also better for the environment.

They achieve their efficiency by capturing and recycling the heat still present in the water vapour condensation and flue exhaust gases created when a boiler burns gas to get the energy it needs. It then reuses that recycled heat to perform a number of tasks, including heating the colder water that comes back to your boiler via the radiator.

Is the Worcester Bosch Greenstar 8000 Style 40kW combi environmentally friendly?

How we heat our homes and the effect that has on climate change has become important to many homeowners worried about the environment.

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.

If you would like your next boiler to help in the fight against climate change, would the Worcester Bosch Greenstar 8000 Style 40kW combi be a suitable choice?

The energy efficiency rating for a boiler describes the amount of energy it uses and wastes during operation and there are two different ways to measure it.

All boilers manufactured and supplied in the UK must have a SEDBUK rating of “A” subject to a minimum energy efficiency score of 92% or above. Before April 2018, the minimum energy efficiency score was 88% (88/89% = "B" SEDBUK rating, 90%+ = "A" SEDBUK rating).

The Worcester Bosch Greenstar 8000 Style 40kW scored an efficiency rating of 94% and a SEDBUK band rating of A.

The Energy Related Products Directive (ERP) intends to reduce the amount of energy consumed by individual products over their entire lifetime, from the initial manufacturing process to final disposal and at all points in between.

The legislation is designed to encourage manufacturers to create products that are more environmentally friendly and which result in a reduction in harmful gas emissions.

The ERP rating for the Worcester Bosch Greenstar 8000 Style 40kW is "A" for heat and "A" for hot water production.

How long am I covered by the warranty for if the Worcester Bosch Greenstar 8000 Style 40kW breaks down?

A parts and labour warranty of 8 years is included when you purchase the Worcester Bosch Greenstar 8000 Style 40kW boiler through PlumbProud.


The top 10 rated Gas Combi boilers

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

1Vaillant ecoTEC Plus 82593.35%
2Vaillant ecoTEC Plus 83292.98%
3Worcester Bosch Greenstar 2000 25kW92.89%
4Viessmann Vitodens 050-W 29kW92.66%
5Vaillant ecoTEC Plus 83592.60%
6Worcester Bosch Greenstar CDi Compact 2892.57%
7Vaillant ecoFIT Pure 82592.39%
8Vaillant ecoTEC Plus 83892.16%
9Vaillant ecoTEC Exclusive IQ 83591.90%
10Vaillant ecoTEC Pro 2491.77%
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