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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

Our PlumbProud boiler quality benchmark tests score this Worcester Bosch Greenstar 8000 Style 35kW Combi boiler at 90.51%. Several factors go into determining our rating including installation costs, manufacturer guarantees, energy efficiency, running costs, and more.

Expect this Worcester Bosch Greenstar 8000 Style 35kW Combi boiler to cost you £2,500 fully installed where there are no complications on the fit if you choose PlumbProud for this installation.

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 around

£2,500

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

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

You might want to consider the Worcester Bosch Greenstar 8000 Style 35kW for your house or flat if you are looking for a combi boiler.

Combi boilers were introduced by manufacturers in the 1970s to offer British homeowners a way to cheaply and reliably heat their homes and have hot water without taking up too much space. Previously, most boilers had one or more storage tanks, which either heated water and kept it warm or held water to be heated later.

With combi boilers, there is no need to find space for large tanks around your home as the hot water needed for your radiators and taps is available on demand. Combi boilers do this by drawing water from your mains supply, heating it instantly whenever you need it and then distributing it to where it's needed in the home.

The major disadvantage to combi boilers is that they have a maximum capacity for heating water. In a larger household, water pressure, volume and temperature will drop if two or more people are trying to use hot water at the same time.

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

Most experienced Gas Safe boiler installers would recommend this Worcester Bosch Greenstar 8000 Style 35kW Combi boiler as a suitable option for larger properties including detached homes with no more than 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.


The size of the Worcester Bosch Greenstar 8000 Style 35kW in millimetres

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

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

The Worcester Bosch Greenstar 8000 Style 35kW is a condensing boiler – we recommend to all clients that they choose the very latest condensing boilers because their efficiency continues to improve year after year.

Condensing boilers recycle heat from both water vapour condensation and flue exhaust gases via a secondary heat exchanger. With this heat, it performs other tasks like warming up colder water returning from your radiator without having to use more gas.

You will save money on your gas bills every year by choosing a condensing boiler as well as benefitting the environment.

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

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.

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.

Is the Worcester Bosch Greenstar 8000 Style 35kW combi an environmentally friendly choice for your home? Let’s have a look 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 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 35kW has an ERP rating of "A" for heat and "A" for hot water.

Does the Worcester Bosch Greenstar 8000 Style 35kW combi boiler come with a warranty?

The parts and labour warranty on the Worcester Bosch Greenstar 8000 Style 35kW covers all repair-related costs for 8 years while the heat exchange warranty covers you for [Heat Exchange Warranty] years.


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 score this Worcester Bosch Greenstar 8000 Style 35kW Combi boiler as 90.51% on the PlumbProud quality scoring system. Our rating is based on various factors, including the installation price, the length of the manufacturer's warranty, and the expected energy efficiency and operating costs.

We would expect this Worcester Bosch Greenstar 8000 Style 35kW Combi boiler to cost £2,500 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.

To receive a free quote on the Worcester Bosch Greenstar 8000 Style 35kW boiler and to receive professional advice and guidance on whether it's the right choice for your home, please enter your postcode in the quote boxes on this page, click here to email us, or call 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

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

If you’re looking for a combi boiler for your house or flat, you may wish to the consider the Worcester Bosch Greenstar 8000 Style 35kW.

Traditional boilers need one or more large tanks to work - one to heat and keep water warm for immediate use and the other to store water intended for heating later. Finding space for these large tanks is difficult in British residential property - remember that our houses and flats are among the smallest in the world. This is the problem that combi boilers were designed to solve when they were introduced in the 1970s.

Combi boilers don't need a tank - instead, they instantly heat water drawn from the mains using technology inside the boiler. This hot water is then distributed immediately to your taps or radiators on demand.

The biggest disadvantage to combi boilers is that they have a maximum capacity for heating water, meaning that they work best when only one point within a household wants hot water. For example, if someone is taking a shower and another person uses a hot water tap at the same time, the water pressure, volume and temperature to both points drops.

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

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

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.

In addition to output rates, you need to consider a combi boiler's flow rate when making your choice.

The flow rate of your boiler dictates the maximum volume of water (measured in litres per minute) that it can heat and distribute to your taps, showers and radiators at any one time.

However, a combi boiler like the Worcester Bosch Greenstar 8000 Style 35kW can only heat and deliver water at the rate at which it actually enters your property. For this reason, you should also find out what the mains pressure to your house is before purchasing a boiler.

It's pointless spending more money on a boiler with a 17l/m flow rate if the local water pressure is 11l/m. To give you an indication of average water demand, a power shower typically requires 12 litres of water per minute and a basin tap 4-8 litres. This Worcester Bosch Greenstar 8000 Style 35kW Combi boiler's flow rate is 13 L/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.


What is the size of the Worcester Bosch Greenstar 8000 Style 35kW?

The Worcester Bosch Greenstar 8000 Style 35kW has the following dimensions - 825 mm high, 440 mm wide, and 365 mm deep.

Is this Worcester Bosch boiler condensing or non-condensing?

Because of their increased energy efficiency, we recommend to all customers that they select one of the latest condensing boilers. Condensing boilers capture the heat from water vapour condensation and flue exhaust gases and recycle that heat to warm water entering the boiler (for example, from your radiators).

The Worcester Bosch Greenstar 8000 Style 35kW is a condensing gas boiler and choosing this model will result in a likely substantial reduction in your fuel bills, particularly if you're replacing an older, inefficient, non-condensing boiler.

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

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

The heating of our homes accounts for 14% of the UK's greenhouse gas emissions. Especially in the big cities, gas boilers are responsible for dangerous levels of nitrogen dioxide emissions.

Would installing a Worcester Bosch Greenstar 8000 Style 35kW combi boiler in your home help combat climate change? What do the figures suggest?

Boilers manufactured and installed in the UK are assigned energy efficiency ratings following testing to an agreed set of standards. These scores indicate how much energy the boiler uses and how much goes to waste when it's in operation.

By law, boilers must achieve a SEDBUK rating of "A" subject to achieving a minimum of 92% energy efficiency. Prior to April 2018, the minimum was 88% (88% and 89% on the SEDBUK are graded "B" and 90% and above is graded "A").

The Worcester Bosch Greenstar 8000 Style 35kW was awarded an efficiency rating of 94% with 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 35kW is "A" for heat and "A" for hot water production.

Does the Worcester Bosch Greenstar 8000 Style 35kW combi boiler come with a warranty?

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


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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