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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.

We estimate that, on a standard, non-complicated installation, the supply and fitting charge for this Worcester Bosch Greenstar 8000 Style 35kW Combi boiler will be around £2,500.

We recommend that you speak to our friendly advisors by calling 01604 343053 to seek professional advice on whether the Worcester Bosch Greenstar 8000 Style 35kW boiler is right for your home. Our team can also provide you with a free quotation for this Worcester Bosch Greenstar 8000 Style 35kW Combi boiler. Alternatively, click here to email us or enter your postcode into the quotation box on this page.


Installed price around

£2,500

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

What type of boiler is the Worcester Bosch Greenstar 8000 Style 35kW - regular, system or combi?

Looking for a gas combi boiler for your flat or house? Then the Worcester Bosch Greenstar 8000 Style 35kW may be an option you should consider.

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.

Is the Worcester Bosch Greenstar 8000 Style 35kW combi boiler a suitable option 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.

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 8000 Style 35kW combi's output level is 35 kW, so which types of property would this Worcester Bosch Greenstar 8000 Style 35kW Combi boiler be an appropriate choice for?

A PlumbProud Gas Safe engineer would recommend that this Worcester Bosch Greenstar 8000 Style 35kW Combi boiler is suitable for larger properties including detached homes with 15 or more radiators and two or more bathrooms.

You need to consider the flow rate as well as the output rate when choosing a combi boiler.

Flow rates, measured in litres per minute, indicate how much water your boiler can heat and distribute around your home at any given time. If your family regularly use hot water around the house at the same time and you have a lot of radiators, you should choose a boiler with a high flow rate. This Worcester Bosch Greenstar 8000 Style 35kW Combi boiler's flow rate is 13 L/m.

However, you also need to consider the flow rate of your local mains water supply. Combis can only draw water from the mains as fast as the pipes can deliver it. If you choose a boiler with a 14l/m flow rate and the mains pipes into your home have a flow rate of 12l/m, your boiler won't be able to operate at full capacity. In other words, try to make sure the local water pressure and your boiler flow rates are as close as possible.

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 dimensions of the Worcester Bosch Greenstar 8000 Style 35kW boiler?

The Worcester Bosch Greenstar 8000 Style 35kW is 825 mm tall, 440 mm wide, and 365 mm deep.

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

We recommend that, if possible, you select one of the very latest condensing gas boilers on the market like the Worcester Bosch Greenstar 8000 Style 35kW.

Condensing boilers are better for the environment because they capture and recycle the heat still present in flue exhaust gases and water vapour condensation for re-use, meaning lower greenhouse gas emissions.

They're also a lot cheaper to run meaning that, if you're replacing a very old and inefficient boiler, the savings on your gas bill over 5-10 years add up to more than you pay for the boiler itself.

Is the Worcester Bosch Greenstar 8000 Style 35kW combi a good choice for the environment?

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.

Gas boilers are responsible for dangerous atmospheric levels of nitrogen dioxide emissions in Britain's biggest cities and, overall, 14% of the UK’s greenhouse gases are produced by our domestic central heating systems.

Do the available figures suggest that installing the Worcester Bosch Greenstar 8000 Style 35kW combi 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 8000 Style 35kW has an efficiency rating of 94% with a SEDBUK grade 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 35kW, the ERP rating 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 35kW breaks down?

You receive a parts and labour warranty of 8 years with the Worcester Bosch Greenstar 8000 Style 35kW boiler.


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%

Combi boilers

Choose from the UK’s biggest range of combis

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The ideal boiler perfect for the largest homes

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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%

Our PlumbProud quality scoring system considers important factors like energy efficiency, the length of a manufacturer’s guarantee, likely running costs, and installed price to determine a boiler's value for money. This model has received 90.51% from our engineers.

Provided the proposed installation is straightforward, we would anticipate that this Worcester Bosch Greenstar 8000 Style 35kW Combi boiler will cost £2,500 fully installed through PlumbProud.

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 8000 Style 35kW 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 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

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

Looking for a gas combi boiler for your house or flat? If you are, the Worcester Bosch Greenstar 8000 Style 35kW boiler may be worth considering.

Combi boilers are excellent for providing hot water and heat for your radiators just when you need it. When you have a combi boiler installed in your home, you just turn on the tap and the hot water for your bath, shower, washing dishes and other activities is there when you need it. It also provides the heat you need to keep your radiators warm.

A combi boiler heats the cold water passing through it, which it draws from the mains. This newly heated water can then be distributed to whichever hot tap or radiator needs it.

In the past, boilers needed at least one storage tank to hold water that was either already heated or would be heated later. Sometimes, you'd have to wait for hot water because there was none left. In addition, storage tanks took up a lot of space and most UK homes are pretty small.

The main disadvantage to combi boilers is that they can only heat a certain amount of water at any one time, meaning the pressure, volume and temperature of water will decrease if more than one tap is on at the same time or if both the shower and washing machine are on together.

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

Whether this Worcester Bosch Greenstar 8000 Style 35kW Combi boiler is right for where you live depends on its size or "output" level. Size does not mean its physical dimensions - it means how powerful it is.

The output level of a boiler tells you how much power it has to heat the water coming from your taps and warming up your radiators. The higher the output level, the greater the volume of water it can heat up.

If the output (measured in kilowatts) is too high, you'll pay higher gas bills and your water will be piping hot. Too low and the water coming out of your taps and being fed into your radiators will often be lukewarm.

The Worcester Bosch Greenstar 8000 Style 35kW combi outputs at a maximum of 35 kW, so which types of property would this Worcester Bosch Greenstar 8000 Style 35kW Combi boiler be appropriate for?

An experienced PlumbProud Gas Safe boiler installer would likely recommend that this Worcester Bosch Greenstar 8000 Style 35kW 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 35kW Combi boiler's flow rate is 13 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 35kW 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.


Dimensions of the Worcester Bosch Greenstar 8000 Style 35kW boiler

The dimensions of the Worcester Bosch Greenstar 8000 Style 35kW are 825 mm tall, 440 mm wide, and 365 mm deep.

Greenstar 8000 Style 35kW – non-condensing or condensing?

We recommend that, if possible, you select one of the very latest condensing gas boilers on the market like the Worcester Bosch Greenstar 8000 Style 35kW.

Condensing boilers are better for the environment because they capture and recycle the heat still present in flue exhaust gases and water vapour condensation for re-use, meaning lower greenhouse gas emissions.

They're also a lot cheaper to run meaning that, if you're replacing a very old and inefficient boiler, the savings on your gas bill over 5-10 years add up to more than you pay for the boiler itself.

Is the Worcester Bosch Greenstar 8000 Style 35kW combi environmentally friendly?

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.

As much as 14% of the UK’s greenhouse gas production derives from our domestic central heating systems. Gas boilers are responsible for dangerous levels of nitrogen dioxide emissions in Britain's largest cities.

Would choosing the Worcester Bosch Greenstar 8000 Style 35kW combi be an environmentally-friendly choice? If so, let's look at its performance figures.

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 Directive (ERP) is European legislation that applies to all products which use or consume energy during their lifespan, including during the manufacturing process and when they're in actual use, right through to the point of final disposal.

The aim is to encourage manufacturers to create new products that are kinder to the environment and create fewer harmful gas emissions.

The Worcester Bosch Greenstar 8000 Style 35kW has an ERP Heat rating of "A" and an ERP Water rating of "A".

How many years' warranty does the Worcester Bosch Greenstar 8000 Style 35kW combi come with?

The Worcester Bosch Greenstar 8000 Style 35kW is covered by a parts and labour warranty of 8 years following installation.


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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