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Worcester Bosch Greenstar 8000 Style 35kW boiler

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Plumbproud rating

90.51%

Worcester Bosch Greenstar 8000 Style 35kW Combi Gas boiler

We have awarded this Worcester Bosch Greenstar 8000 Style 35kW Combi boiler a rating of 90.51% 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.

This Worcester Bosch Greenstar 8000 Style 35kW Combi boiler is likely to cost you £2,500 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 get a free quote for the installation of the Worcester Bosch Greenstar 8000 Style 35kW boiler in your home, simply enter your postcode in the box provided on this page. You can also find out whether this is the right boiler for your home by clicking to email our installation team or by calling us on 01604 343053.


Installed price around

£2,500

GET A COMPETITIVE BOILER QUOTE

Please enter your postcode below to get a personalised quotation for the perfect boiler for your home

Worcester Bosch Greenstar 8000 Style 35kW Combi Gas boiler frequently asked questions

Worcester Bosch Greenstar 8000 Style 35kW - a regular, combi or system boiler?

When looking for a combi boiler for your house or flat, the Worcester Bosch Greenstar 8000 Style 35kW might be a suitable option for you.

Traditional boilers often have up to two tanks that either store heated water or water to be heated later. Boiler manufacturers introduced combi boilers in the 1970s to avoid the need for those big tanks. Combi boilers allow homeowners to benefit from the reliable central heating and hot water level they want but without having to give up so much space within their properties - remember that homes in the UK are among the smallest in the developed world.

Your taps and radiators get the hot water they need with a combi boiler. Combi boilers draw cold water direct from the mains which is then heated instantly on demand and distributed to your radiators and taps.

However, combi boilers cannot heat very large volumes of water, which is their main disadvantage. So, for example, when someone wants to take a shower while another person wants to use a hot water tap to do the dishes, water pressure and quantity to both points decreases.

Is a Worcester Bosch Greenstar 8000 Style 35kW combi the right boiler for my house or flat?

Whether this Worcester Bosch Greenstar 8000 Style 35kW 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 35kW Combi boiler be appropriate for given its output of 35 kW?

Most experienced Gas Safe engineers would likely recommend that, at this level of output, this Worcester Bosch Greenstar 8000 Style 35kW Combi boiler would be a suitable choice for larger properties including detached homes with 15 or more radiators and two or more bathrooms.

When choosing a combi boiler like the Worcester Bosch Greenstar 8000 Style 35kW, you need to consider the "flow rate" as well as the output rate. Flow rates (measured in litres per minute) indicate the volume of hot water that the boiler can heat up and then distribute to your taps and radiators.

However, combi boilers draw water from the mains and this means they can only heat the amount of water that actually enters your property.

What this means is that, if your mains pressure is 12 litres per minute, that is your boiler's effective flow rate even if it has the capacity to process 18 litres per minute. This Worcester Bosch Greenstar 8000 Style 35kW Combi boiler's flow rate is 13 L/m.

To give you an idea of the flow rate you might need, a power shower typically requires around 12 litres of water per minute and a basin tap requires 4-8 litres per minute.

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.


How big is the Worcester Bosch Greenstar 8000 Style 35kW?

The Worcester Bosch Greenstar 8000 Style 35kW boiler measures 825 mm [H] x 440 mm [W] x 365 mm [D] in size.

Is the Worcester Bosch Greenstar 8000 Style 35kW condensing or non-condensing?

The Worcester Bosch Greenstar 8000 Style 35kW is a condensing gas boiler - we strongly recommend that you choose one of the latest condensing models if possible.

With a condensing boiler, you save money on your gas bills because your boiler captures and recycles the heat present in the flue exhaust gases and water vapour condensation for re-use, meaning they operate far more economically and efficiently.

How energy efficient is the Worcester Bosch Greenstar 8000 Style 35kW combi?

With so many of us worried about the environmental impact of our personal choices, the relationship between how we heat our homes and climate change has become an important issue for many homeowners.

Central heating produces 14% of all greenhouse gas emissions in the UK. Gas boilers in the larger cities emit dangerous levels of nitrogen dioxide.

Would installing the Worcester Bosch Greenstar 8000 Style 35kW combi in your home be an environmentally friendly decision? Let's look closely at the figures.

Boilers manufactured or supplied to UK domestic properties must achieve a legal minimum energy efficiency rating of 92% (equivalent to a good "A" grade using the SEDBUK scale). Prior to this, the minimum was 88% (88% and 89% are a "B" SEDBUK grade and anything 90% or above is an "A" grade).

The energy efficiency rating of a boiler refers to the amount of energy it uses to perform its everyday functions as well as the amount of energy it wastes.

The Worcester Bosch Greenstar 8000 Style 35kW has been given a rating of 94% for energy efficiency, equivalent to a SEDBUK "A" rating.

The Energy Related Products Directive, also known as ERP, is European legislation that intends to reduce energy consumption related to products right from the initial manufacturing process through to eventual final disposal.

The purpose of the directive is to encourage manufacturers to create new products that are kinder to the environment and which result in lower overall harmful gas emissions through a product's entire life cycle.

The Worcester Bosch Greenstar 8000 Style 35kW has a rating of "A" for heat and "A" for water.

What is the warranty period for the Worcester Bosch Greenstar 8000 Style 35kW?

The Worcester Bosch Greenstar 8000 Style 35kW boiler comes with a 8 year warranty for parts and labour.


Worcester Bosch Greenstar 8000 Style 35kW Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty8 Years
Output in kW35 kW
Height825 mm
Width440 mm
Depth365 mm
MountingWall
Flow rate13 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 35kW boiler

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Worcester Bosch Greenstar 8000 Style 35kW Combi Gas boiler

  1. Home
  2. Worcester Bosch Greenstar 8000 Style 35kW
Plumbproud rating for this boiler
90.51%

We have awarded this Worcester Bosch Greenstar 8000 Style 35kW Combi boiler a rating of 90.51% 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.

We would anticipate that this Worcester Bosch Greenstar 8000 Style 35kW Combi boiler would cost you £2,500 fully installed through PlumbProud provided that the fitting is standard and with no complications.

To get a free quote for the installation of the Worcester Bosch Greenstar 8000 Style 35kW boiler in your home, simply enter your postcode in the box provided on this page. You can also find out whether this is the right boiler for your home by clicking to email our installation team or by calling us on 01604 343053.


Installed price guideline
£2,500

Get your free quote

Worcester Bosch Greenstar 8000 Style 35kW Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty8 Years
Output in kW35 kW
Height825 mm
Width440 mm
Depth365 mm
MountingWall
Flow rate13 L/m
ERP HeatA
ERP WaterA

Worcester Bosch Greenstar 8000 Style 35kW Combi Gas boiler frequently asked questions

Is the Worcester Bosch Greenstar 8000 Style 35kW boiler a combi, system or regular boiler?

Suitable for a house or a flat, the Worcester Bosch Greenstar 8000 Style 35kW combi boiler is worth considering if you want a combi boiler.

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.

Would the Worcester Bosch Greenstar 8000 Style 35kW combi be a suitable boiler for 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.

The output of a boiler is measured in kilowatts and tells you how much power it has available to heat the water it sends to your hot taps, showers and radiators. The greater the demand for hot water in your home, the larger the output you will need.

It is important to select a boiler with the optimal output rate. Choose one with too high an output and your gas bills will be too expensive. Choose one with too low an output and sometimes the water in your radiators and coming out of your taps will be barely lukewarm.

The output of the Worcester Bosch Greenstar 8000 Style 35kW combi is 35 kW kilowatts, so which types of property would this be most suitable for?

Most Gas Safe engineers would suggest that the Worcester Bosch Greenstar 8000 Style 35kW combi boiler would be a suitable choice for installation in 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 35kW 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 35kW Combi boiler's flow rate is 13 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.


Worcester Bosch Greenstar 8000 Style 35kW size

The Worcester Bosch Greenstar 8000 Style 35kW is 825 mm high by 440 mm wide by 365 mm deep.

Is the Worcester Bosch Greenstar 8000 Style 35kW condensing or non-condensing?

We recommend the Worcester Bosch Greenstar 8000 Style 35kW as it is a modern condensing gas boiler from a trusted manufacturer with a reputation for supplying highly energy-efficient boilers.

Condensing boilers capture the heat still present in water vapour condensation and flue exhaust gases and recycle it back into the heating system. With this extra energy, your boiler can, among other tasks, reheat colder water coming back from your radiators without having to burn more gas.

Condensing boilers significantly reduce your quarterly gas costs and they're better for the environment.

How energy efficient is the Worcester Bosch Greenstar 8000 Style 35kW combi boiler?

Price and performance are two important issues when choosing a boiler but now, for many people in the UK, so is the environmental impact of how we heat our homes and its effect on 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.

Would the environmental impact of installing a Worcester Bosch Greenstar 8000 Style 35kW combi in your home be positive? Let's look at the numbers.

All boilers manufactured in the UK from April 2018 must operate at a minimum level of energy efficiency of 92% ("A" rating on the SEDBUK scale). Before that, the minimum was 88% - boilers scoring 88/89% were given a SEDBUK "B" rating and 90% or above an "A" rating.

The energy efficiency score of a boiler indicates how much energy it uses and how much goes to waste when in use.

After its assessment, the Worcester Bosch Greenstar 8000 Style 35kW was given an efficiency rating of 94% and a SEDBUK grading of "A".

The Energy Related Products (ERP) Directive is important European legislation that aims to limit energy use and harmful gas emissions during the manufacturing process, when the product is in use, and after it is disposed of.

For the Worcester Bosch Greenstar 8000 Style 35kW, the ERP Heat rating is "A" and the ERP Water rating is "A".

What is the length of the warranty on the Worcester Bosch Greenstar 8000 Style 35kW?

The Worcester Bosch Greenstar 8000 Style 35kW boiler comes with a parts and labour warranty lasting 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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