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Worcester Bosch Greenstar CDi Highflow 550 boiler

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Plumbproud rating

86.62%

Worcester Bosch Greenstar CDi Highflow 550 Combi Gas boiler

On the PlumbProud boiler quality benchmark scoring system, we have rated this Worcester Bosch Greenstar CDi Highflow 550 Combi boiler at 86.62%. Ratings are determined by considering a number of important factors including the energy efficiency, price installed, warranty length, and running costs of the boiler.

This Worcester Bosch Greenstar CDi Highflow 550 Combi boiler will cost around £3,500 fitted through PlumbProud where there are no complications during the installation.

Get a free quote on the Worcester Bosch Greenstar CDi Highflow 550 boiler and advice on whether this is the right choice for your home by entering your postcode in the quote box on this page, clicking here to email us, or giving us a call at 01604 343053.


Installed price around

£3,500

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Worcester Bosch Greenstar CDi Highflow 550 Combi Gas boiler frequently asked questions

Worcester Bosch Greenstar CDi Highflow 550 - a system boiler, regular boiler or combi boiler?

The Worcester Bosch Greenstar CDi Highflow 550 may be worth considering if you are looking for a combi boiler for your house or flat.

The UK has some of the smallest homes in the Western world, which is partly why combi boilers were introduced in the 1970s. Traditional boilers require one or more large storage tanks which they use to either heat water and keep it warm or store water intended for heating later. These tanks took up a lot of space in people's homes.

Combi boilers save space because they don't require these tanks to operate. Instead, combis draw water direct from your mains supply then instantly heat and distribute it on demand.

The biggest disadvantage in using combi boilers is that they have a maximum capacity volume for heating water. While this may not be an issue in a small household, it could be for a larger household where there is higher demand for hot water. When more than one person is using the water, it is distributed between the two points, reducing the pressure and temperature at each point.

Is the Worcester Bosch Greenstar CDi Highflow 550 combi boiler a suitable choice for my property?

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 CDi Highflow 550 combi boiler has an output level of 30 kW, so which types of property would it be appropriate for?

An experienced PlumbProud heating engineer would recommend that the most suitable type of property for a Worcester Bosch Greenstar CDi Highflow 550 combi would be medium-sized homes and larger apartments containing 10-15 radiators and providing hot water for two bathrooms.

As well as the output rate, you need to consider "flow rate" when choosing a combi boiler.

The flow rate describes how much water a combi boiler can draw from the mains, instantly heat, and then send to your radiators. Flow rates are measured in litres per second and this Worcester Bosch Greenstar CDi Highflow 550 Combi boiler's flow rate is 25 L/m.

The water in your mains pipe also has its own flow rate - normally between 10 and 12l/m in most parts of Britain. This means that, if you choose a combi boiler with a flow rate of 17l/m where local water pressure is 11lm, it won't actually process more water because of the slower flow rate of the mains.

In addition, larger households with more than one bathroom, multiple radiators, and where family members may want to use hot water at the same time (like morning showers) may actually need a boiler with a higher flow rate than either the boiler or the local mains pipe.

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 CDi Highflow 550?

The Worcester Bosch Greenstar CDi Highflow 550 is 850 mm high by 600 mm wide by 600 mm deep.

Wall-hung boilers have become the preferred choice for homeowners in the UK over the last 20 years, but hundreds of thousands of homes still use bulkier floor-standing models for their central heating. It is possible to replace your floor-standing boiler with a wall-mounted one if you wish so that you and your family have more living space. But we must advise you that you may also have to pay to replace some or all of your existing pipework.

You should however be able to recoup this cost in full after a few years because of the savings you make each quarter on your gas bills.

Please note that you'll need to remove your hot water cylinder and/or expansion tank if you intend to replace your current heat only boiler or system boiler with the Worcester Bosch Greenstar CDi Highflow 550.

Contact PlumbProud, and we'll share our experience and assistance for the best course of action.

Is the Worcester Bosch Greenstar CDi Highflow 550 a non-condensing or condensing boiler?

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 CDi Highflow 550 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 the Worcester Bosch Greenstar CDi Highflow 550 combi environmentally friendly?

With more and more people concerned about climate change, how we heat our homes and the damage it does to the environment is increasingly being questioned by British homeowners.

In the UK, central heating systems account for 14% of greenhouse gas production. Gas boilers in particular are responsible for emissions of dangerous nitrogen dioxide in British cities.

Is the Worcester Bosch Greenstar CDi Highflow 550 combi boiler an environmentally friendly choice for your home? Here’s what the figures say.

All boilers manufactured and installed in the UK are required to have an energy efficiency rating of 92% or above (or a good “A” SEDBUK rating). Before April 2018, when the law changed, the minimum energy efficiency level permissible was 88% (86-90% is a SEDBUK "B" rating and 90%+ is an "A" rating).

A boiler's energy efficiency rating indicates the amount of energy used and wasted during normal operational performance.

Following its assessment, the Worcester Bosch Greenstar CDi Highflow 550 was given an efficiency rating of 92% and a SEDBUK grading of "A".

The Energy Related Products Directive grades products according to the energy they consume and the harmful gas emissions they create, from manufacturing right through to final disposal, including how they're used by customers between these two points.

The Worcester Bosch Greenstar CDi Highflow 550 is rated "A" for heat and "B" for water.

What length of warranty does the Worcester Bosch Greenstar CDi Highflow 550 come with?

You receive a parts and labour warranty of 7 years with the Worcester Bosch Greenstar CDi Highflow 550 boiler.


Worcester Bosch Greenstar CDi Highflow 550 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating92%
Band ratingA
LPG Compatible?Yes
P/L Warranty7 Years
Output in kW30 kW
Height850 mm
Width600 mm
Depth600 mm
MountingFloor
Flow rate25 L/m
ERP HeatA
ERP WaterB

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 CDi Highflow 550 Combi Gas boiler

  1. Home
  2. Worcester Bosch Greenstar CDi Highflow 550
Plumbproud rating for this boiler
86.62%

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 86.62% from our engineers.

You should budget approximately £3,500 for the supply and installation of this Worcester Bosch Greenstar CDi Highflow 550 Combi boiler on a standard, non-complicated fit.

Get a free, no-obligation Worcester Bosch Greenstar CDi Highflow 550 boiler quote today by simply entering your postcode in the box on this page. You can also speak to a boiler installation expert about heating for your home by getting in touch via email or by phone on 01604 343053.


Installed price guideline
£3,500

Get your free quote

Worcester Bosch Greenstar CDi Highflow 550 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating92%
Band ratingA
LPG Compatible?Yes
P/L Warranty7 Years
Output in kW30 kW
Height850 mm
Width600 mm
Depth600 mm
MountingFloor
Flow rate25 L/m
ERP HeatA
ERP WaterB

Worcester Bosch Greenstar CDi Highflow 550 Combi Gas boiler frequently asked questions

Is the Worcester Bosch Greenstar CDi Highflow 550 a standard, combi or system boiler?

The Worcester Bosch Greenstar CDi Highflow 550 is a combi boiler you may wish to consider if you want this type of boiler for your house or flat.

In older British homes, traditional boilers required you to find room for one or more storage tanks. One tank would keep hot water warm and the other stored cold water for later heating. Manufacturers introduced combi boilers to the UK in the 1970s so that homeowners could get the warmth and hot water they needed without having to sacrifice too much valuable space – remember that residential property in this country is among the smallest in the Western world.

Combi boilers deliver hot water to your radiators and taps using water they draw directly from the mains supply. As mains water travels through a combi boiler, the technology within it heats the cold water instantly and on demand. The hot water is then distributed throughout your house.

Combi boilers have one drawback, however: they can only heat a certain amount of water within a given time. For example, if someone uses the shower and another person uses the hot water tap at the same time, water pressure drops because water reaches each point differently.

Should I choose a Worcester Bosch Greenstar CDi Highflow 550 combi boiler 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 CDi Highflow 550 combi's output is 30 kW, so which types of property would this Worcester Bosch Greenstar CDi Highflow 550 Combi boiler be appropriate for?

Most experienced boiler engineers would recommend that this Worcester Bosch Greenstar CDi Highflow 550 Combi boiler would be suitable for medium-sized homes and larger apartments with 10-15 radiators and two bathrooms.

With all combi boilers, the "flow rate" (measured in litres per minute) is as important a consideration as output rate when choosing which model to go for. This Worcester Bosch Greenstar CDi Highflow 550 Combi boiler's flow rate is 25 L/m.

Like all combi boilers, the Worcester Bosch Greenstar CDi Highflow 550 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.

However, the water in the mains pipe that feeds your boilers has its own flow rate - normally between 10 and 12l/m. So if you choose a combi with a flow rate of 14l/m but local water pressure is equivalent to 11l/m, your boiler will actually operate at 11l/m - below its capacity.

In addition, if different family members want hot water at the same time (like for regular morning and evening showers) and your boiler has to provide hot water to your radiators at the same time, 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.


Dimensions of the Worcester Bosch Greenstar CDi Highflow 550 boiler

The Worcester Bosch Greenstar CDi Highflow 550 has the following dimensions - 850 mm high, 600 mm wide, and 600 mm deep.

Many homeowners still have floor-standing boilers like the Worcester Bosch Greenstar CDi Highflow 550 even though wall-mounted boilers have been the preferred choice because of their compact size. If you want to replace your existing boiler with a compact wall-hung one to free up extra living space for you and your family, we can do this for you but please be aware that we may need to replace much of your existing pipework, which will incur an additional charge.

However, given the efficiency of modern wall-mounted gas boilers, the savings you make on your energy bills over the coming years should more than repay the cost of your investment.

If you are considering the Worcester Bosch Greenstar CDi Highflow 550 as a replacement for your existing heat only or system boiler, you'll also have to budget for the removal of your hot water cylinder and/or your expansion tank.

If you would like professional information and guidance on the best choices for your home, please contact PlumbProud for advice.

Greenstar CDi Highflow 550 – condensing or non-condensing?

Condensing boilers convert the warmth present in flue exhaust gases and water vapour condensation into heat which they then recycle to increase the temperature of the colder water returning to your system.

We recommend that homeowners choose a condensing boiler like the Worcester Bosch Greenstar CDi Highflow 550 for this reason - the more recent your model the better because the technology improves every year.

You'll benefit from lower quarterly gas bills and condensing boilers are also much more environmentally friendly.

How energy efficient is the Worcester Bosch Greenstar CDi Highflow 550 combi boiler?

As the British public has become more conscious of climate change, many homeowners consider the environment when choosing how to heat their homes.

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 a Worcester Bosch Greenstar CDi Highflow 550 combi help the environment? Let’s see what the performance figures suggest.

All boilers manufactured in the UK from April 2018 must achieve a SEDBUK “A” grade and an energy efficiency rating of 92% or above. Before that, the minimum was 88% - efficiency ratings of 88% and 89% were scored a “B” and 90%+ an "A".

A boiler's energy efficiency rating describes how much energy it uses and wastes during its standard operation.

The energy efficiency of the Worcester Bosch Greenstar CDi Highflow 550 was rated at 92% with 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 CDi Highflow 550 has an ERP Heat rating of "A" and an ERP Water rating of "B".

What length of warranty does the Worcester Bosch Greenstar CDi Highflow 550 come with?

The Worcester Bosch Greenstar CDi Highflow 550 boiler comes with a 7 year warranty for parts and labour.


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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