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Worcester Bosch Greenstar 8000 Style 45kW boiler

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Plumbproud rating

88.86%

Worcester Bosch Greenstar 8000 Style 45kW Combi Gas boiler

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 45kW Combi boiler, we have awarded a rating of 88.86%.

This Worcester Bosch Greenstar 8000 Style 45kW Combi boiler is likely to cost you £2,900 supplied and fully installed through PlumbProud, although there may be additional charges if the fit takes longer than anticipated. You will, however, receive a binding quote from us prior to starting work.

To receive a free quote on the Worcester Bosch Greenstar 8000 Style 45kW boiler, as well as professional advice on whether it will meet the needs of your home, simply enter your postcode in the quote box on this page, click here to email us, or call 01604 343053.


Installed price around

£2,900

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Worcester Bosch Greenstar 8000 Style 45kW Combi Gas boiler frequently asked questions

Is the Worcester Bosch Greenstar 8000 Style 45kW a combi, system or regular boiler?

The Worcester Bosch Greenstar 8000 Style 45kW boiler could be suitable for your house or flat if you are looking for a new combi boiler.

Combi boilers have much to recommend them - not least the fact that they save a lot of space. Combination (or combi) boilers were introduced by manufacturers in the 1970s to provide practical central heating and hot water distribution to smaller properties - remember that UK houses and flats tend to be among the smallest in the developed world.

Traditional boilers require one or more storage tanks to keep hot water warm and to store water for heating later. In contrast, combi boilers draw water directly from the mains supply and heat it instantly, removing the need for a storage tank. The heated water is then distributed to your taps and radiators on demand.

While combi boilers are suitable choices for many properties, especially those without a loft, there is also a disadvantage in using them. Water is heated instantly and the volume of water that can be heated at any one time is limited. This can result in less water being sent to taps and showers if more than one is being used simultaneously. In these instances, the water pressure to both points will drop.

Should I install a Worcester Bosch Greenstar 8000 Style 45kW combi boiler in my home?

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

The output rate tells you how much energy your boiler has to use to provide you and your family with hot water and central heating. A higher output rate means that it can heat greater volumes of water.

Please be aware, though - if you choose a boiler whose output is too low, the water in your radiators and coming from your taps may not be warm enough. Conversely, if you choose a boiler with too high an output, you'll pay more for gas than is necessary.

The Worcester Bosch Greenstar 8000 Style 45kW combi boiler has an output level of 45 kW, so which types of property would it be appropriate for?

An experienced PlumbProud Gas Safe boiler installer would likely recommend that this Worcester Bosch Greenstar 8000 Style 45kW Combi boiler would be suitable for larger properties including detached homes with 15 or more radiators and two or more bathrooms.

When choosing a combi boiler for your home, you need to think about "flow rates" as well as output rates. This Worcester Bosch Greenstar 8000 Style 45kW Combi boiler's flow rate is 15 L/m.

This indicates the maximum volume of hot water (measured in litres per minute) that your boiler can heat then distribute to your taps, showers and radiators at any one time. The greater the demand for hot water in your home, the higher the flow rate you will require.

However, all combi boilers like the Worcester Bosch Greenstar 8000 Style 45kW draw water directly from the mains and heat it instantly.

This means that they can only heat and distribute water at the rate it enters the property (the "mains pressure" rate). For example, if your mains pressure is 11 litres per minute, this will be the highest flow rate you can achieve even if your boiler's flow rate is 17l/m.

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.


Making space for the Worcester Bosch Greenstar 8000 Style 45kW

The Worcester Bosch Greenstar 8000 Style 45kW is 825 mm high by 440 mm wide by 365 mm deep.

Is the Worcester Bosch Greenstar 8000 Style 45kW a condensing or non-condensing boiler?

The Worcester Bosch Greenstar 8000 Style 45kW is a condensing gas boiler - we strongly suggest that you choose either this model or a recently released model if at all possible.

A condensing boiler captures and recycles the warmth present in flue exhaust gases and water vapour condensation created by the burning of gas to warm up the water coming back into your boiler - for example, from your radiators.

Condensing boilers cost less to run (lower gas bills) and are better for the environment.

Is the Worcester Bosch Greenstar 8000 Style 45kW combi an energy-efficient boiler?

Many homeowners are becoming increasingly concerned about how they heat their homes and the impact it has on climate change and other important environmental issues.

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.

Would choosing the Worcester Bosch Greenstar 8000 Style 45kW combi be an environmentally-friendly choice? If so, let's look at its performance figures.

All boilers manufactured and installed in the UK are required by law to have an energy efficiency rating of at least 92%, equivalent to a good “A” rating on the SEDBUK scale. Before this, the minimum was 88% (ratings of 88% and 89% are equivalent to a high “B” SEDBUK rating and anything 90% or higher is an "A" rating).

A boiler's energy efficiency rating is designed to let you know how much energy is used and wasted during normal functioning.

The Worcester Bosch Greenstar 8000 Style 45kW was given an efficiency rating of 94% and a band rating 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 45kW, the ERP rating is "A" for heat and "A" for hot water production.

How long is the warranty offered by the manufacturer for the Worcester Bosch Greenstar 8000 Style 45kW boiler?

The Worcester Bosch Greenstar 8000 Style 45kW boiler is provided with a parts and labour warranty lasting 8 years.


Worcester Bosch Greenstar 8000 Style 45kW Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty8 Years
Output in kW45 kW
Height825 mm
Width440 mm
Depth365 mm
MountingWall
Flow rate15 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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The ideal boiler perfect for the largest homes

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Worcester Bosch Greenstar 8000 Style 45kW boiler

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Worcester Bosch Greenstar 8000 Style 45kW Combi Gas boiler

  1. Home
  2. Worcester Bosch Greenstar 8000 Style 45kW
Plumbproud rating for this boiler
88.86%

We have determined a rating of 88.86% for this Worcester Bosch Greenstar 8000 Style 45kW Combi 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.

We would expect that, unless there are complications during fitting, this Worcester Bosch Greenstar 8000 Style 45kW Combi boiler would cost £2,900 supplied and professionally installed through PlumbProud.

Wondering if the Worcester Bosch Greenstar 8000 Style 45kW is the right boiler for your home? Then speak to a professional here by getting in touch via email or call us on 01604 343053. You can also get a free quote by entering your postcode in the box on the page.


Installed price guideline
£2,900

Get your free quote

Worcester Bosch Greenstar 8000 Style 45kW Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty8 Years
Output in kW45 kW
Height825 mm
Width440 mm
Depth365 mm
MountingWall
Flow rate15 L/m
ERP HeatA
ERP WaterA

Worcester Bosch Greenstar 8000 Style 45kW Combi Gas boiler frequently asked questions

What type of boiler is the Worcester Bosch Greenstar 8000 Style 45kW - regular, system or combi?

The Worcester Bosch Greenstar 8000 Style 45kW may be worth considering if you are looking for a combi boiler for your house or flat.

Traditional boilers have one or two tanks - one holds hot water to keep it warm and the other water for later heating. Because UK residential property is among some of the smallest in the world, manufacturers introduced combi boilers and the heat pumps that go in them in the 1970s to reduce the amount of space boilers needed to take up.

The hot water needed for your radiators and taps is available on demand when you have a combi boiler. Combi boilers use technology located within the boiler to heat cold water, which it draws from the mains, and to distribute hot water where it's needed around your home.

A combi boiler, however, has the disadvantage of a maximum capacity for the amount of water it can heat. The result is that if someone uses the shower while another uses a hot water tap simultaneously, the amount of water reaching each point falls, causing water pressure to drop.

Is the Worcester Bosch Greenstar 8000 Style 45kW combi boiler a suitable option for my house or flat?

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

The output rate of a boiler tells you how much power it has available to it for heating the water that comes out of your taps and warms your radiators. A higher output rate means that your boiler has more power at its disposal.

You need to make sure you select a boiler with the right output rate. That's because, if your output rate is too high, then your boiler will have more power than it needs but it will cost too much to run. If the output rate is too low, your water may often not be hot enough.

The Worcester Bosch Greenstar 8000 Style 45kW combi's output is 45 kW, so which types of property would this Worcester Bosch Greenstar 8000 Style 45kW Combi boiler be appropriate for?

A PlumbProud Gas Safe boiler installer would recommend that this Worcester Bosch Greenstar 8000 Style 45kW Combi boiler is appropriate for larger properties including detached homes with 15 or more radiators and two or more bathrooms.

Please remember to consider "flow rates" as well when choosing your new boiler. All combi boilers including the Worcester Bosch Greenstar 8000 Style 45kW draw water from the mains.

Each combi boiler has its own flow rate (measured in litres per minute) - this tells you how much water it can heat and distribute to your home’s taps and radiators straight from the mains. This Worcester Bosch Greenstar 8000 Style 45kW Combi boiler's flow rate is 15 L/m.

There is no benefit to you in choosing a combi with a high flow rate if your mains pressure is low - save money by buying a boiler whose flow rate is equal to or slightly more than the pressure in your water pipes.

In addition, if you have a lot of radiators and bathrooms in your home or you have a large household that often uses lots of hot water at the same time, like for regular morning and evening showers, a combi boiler may not be suitable.

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.


What are the proportions of a Worcester Bosch Greenstar 8000 Style 45kW boiler?

The Worcester Bosch Greenstar 8000 Style 45kW has the following dimensions - 825 mm high, 440 mm wide, and 365 mm deep.

Greenstar 8000 Style 45kW – non-condensing or condensing?

The Worcester Bosch Greenstar 8000 Style 45kW is a condensing gas boiler - in fact, we recommend that you select this model or one of the latest condensing boilers on the market as the technology continues to improve over time.

Condensing boilers capture the heat still present in the flue exhaust gases and water vapour condensation created when the gas is burned and they recycle this back into the heating system to warm up the cold water re-entering the boiler from your radiators.

They're much more environmentally friendly and installing one results in much lower annual gas bills.

How does the Worcester Bosch Greenstar 8000 Style 45kW combi rate environmentally?

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

We generate 14% of UK greenhouse gas emissions through centrally heating our domestic properties. Gas boilers are mainly responsible for harmful nitrogen dioxide emissions in larger British cities.

Will installing a Worcester Bosch Greenstar 8000 Style 45kW combi in your home be a positive contribution to the environment? The figures below will tell you more.

Boilers manufactured after April 2018 in the UK must achieve an "A" on the SEDBUK grading system as well as score a minimum of 92% on a separate energy efficiency test. Prior to that, the minimum was 88% - boilers rated at 88% and 89% were given a “B” rating (90% and higher were given an "A").

An energy efficiency rating describes how much energy the boiler uses and how much it wastes when in use.

The Worcester Bosch Greenstar 8000 Style 45kW was awarded an efficiency rating of 94% with a SEDBUK grading of "A".

The Energy Related Products Directive intends to encourage all manufacturers to reduce the harmful gas emissions associated with the products they make, from the manufacturing stage to final disposal, including when they are in active use.

The Worcester Bosch Greenstar 8000 Style 45kW has an ERP rating of "A" for heat and "A" for hot water.

Does the Worcester Bosch Greenstar 8000 Style 45kW combi boiler come with a warranty?

The Worcester Bosch Greenstar 8000 Style 45kW is supplied with a parts and labour warranty of 8 years.


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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