GET A COMPETITIVE QUOTE

Please enter your postcode below to get a free, no obligation, personalised quotation from PlumbProud

Worcester Bosch Greenstar CDi Highflow 550 boiler

  1. Home
  2. Worcester Bosch Greenstar CDi Highflow 550
Plumbproud rating

86.62%

Worcester Bosch Greenstar CDi Highflow 550 Combi Gas boiler

Considering lots of different factors such as price installed, manufacturer guarantees, energy efficiency, and the likely running cost, we’ve given this Worcester Bosch Greenstar CDi Highflow 550 Combi boiler a rating of 86.62% using our PlumbProud quality scoring system.

We anticipate the supply and installation cost for this model of boiler will be around £3,500 on a standard fit.

To receive a free quote on the Worcester Bosch Greenstar CDi Highflow 550 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

£3,500

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 CDi Highflow 550 Combi Gas boiler frequently asked questions

What kind of boiler is the Worcester Bosch Greenstar CDi Highflow 550 - standard, combi or system?

If you’re looking for a combi boiler for your house or flat, then the Worcester Bosch Greenstar CDi Highflow 550 is one you may wish to consider.

Combi boilers provide hot water or heating for your home on demand. You just need to turn the tap to get hot water or switch on the radiator and you’ll feel your home warm up within minutes.

In contrast, traditional boilers required either one or two large storage tanks to work - one to heat and keep water warm and the other to hold cold water for later heating. If the immersion tank was empty, it wasn’t uncommon to wait up to an hour for enough hot water to fill a bath, for example.

Combi boilers draw cold water from the mains and then heat it instantly whenever it's needed, all from one small unit.

The one disadvantage to combi boilers is that, if more than one point is in use at any one time (for example, if someone is taking a shower and another person turns on a hot water tap elsewhere in the property), water pressure, temperature and volume drop to both points.

Would the Worcester Bosch Greenstar CDi Highflow 550 combi be a suitable boiler for my house or flat?

You should make sure that the boiler you install in your property 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 has to be powerful enough to heat all the hot water you need for your radiators and taps. Power is measured in kilowatts and the more kilowatts a boiler has available to it, the more water it can heat.

If the output (measured in kilowatts) is too high, you'll have all the power you need and more but your gas bills will be much higher. If it's too low, you'll often find that the water coming out of your taps and fed into your radiators is only lukewarm.

With the Worcester Bosch Greenstar CDi Highflow 550 combi's output at 30 kW, which types of property would this Worcester Bosch Greenstar CDi Highflow 550 Combi boiler be most appropriate for?

A heating engineer would recommend that this Worcester Bosch Greenstar CDi Highflow 550 Combi boiler would be a suitable installation choice for medium-sized homes and larger apartments with 10-15 radiators and 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.


Worcester Bosch Greenstar CDi Highflow 550 size

The Worcester Bosch Greenstar CDi Highflow 550 occupies a space of 850 mm high by 600 mm wide and 600 mm deep.

Despite the increase in demand for compact, wall-mounted boilers over the last 20 years, hundreds of thousands of homes still have large floor-standing boilers like the Worcester Bosch Greenstar CDi Highflow 550. If you would like a wall-mounted boiler to replace your existing floor-standing unit to free up space, we can carry out this installation for you but please bear in mind that we may also need to replace your existing pipework, which will add extra costs to the work.

You should however be able to repay your investment in full within a few years with the savings you make on your gas bills.

Replacing an existing heat only or system boiler with the Worcester Bosch Greenstar CDi Highflow 550 will also require our fitters to remove and dispose of your hot water cylinder/expansion tank.

Please contact PlumbProud for more information and guidance on the right course of action for you.

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

Condensing gas boilers like the Worcester Bosch Greenstar CDi Highflow 550 are more energy-efficient and choosing one for your home will cut the amount you pay every year for your gas.

They do this by capturing the heat in water vapour condensation and in exhaust gases which would normally be expelled via the flue. They then recycle that heat, returning it to the system to, among other tasks, reheat colder water that is returning to your boiler from your radiators.

Is the Worcester Bosch Greenstar CDi Highflow 550 combi a good choice for the environment?

How we heat our homes and the damage we might be doing to the environment as a result has become an important point of concern to many homeowners worried about climate change.

Dangerous levels of nitrogen dioxide emissions in larger UK cities are caused by gas boilers in domestic properties, and 14% of the UK’s greenhouse gas production is as a result of central heating.

Would choosing the Worcester Bosch Greenstar CDi Highflow 550 combi boiler be an environmentally friendly decision? Here's what the figures say.

The energy efficiency rating for a boiler describes the amount of energy it uses and wastes during operation and there are two different ways to measure it.

All boilers manufactured and supplied in the UK must have a SEDBUK rating of “A” subject to a minimum energy efficiency score of 92% or above. Before April 2018, the minimum energy efficiency score was 88% (88/89% = "B" SEDBUK rating, 90%+ = "A" SEDBUK rating).

The Worcester Bosch Greenstar CDi Highflow 550 scored an efficiency rating of 92% and a SEDBUK band rating of A.

The ERP (Energy Related Products Directive) applies to all products that consume energy at any time in their lifetime, from manufacture to disposal and all points in between.

This European legislation intends to encourage manufacturers to offer end users products that are better for the environment through the creation of fewer harmful gas emissions at all points of a product's life cycle.

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

Am I covered if the Worcester Bosch Greenstar CDi Highflow 550 combi boiler breaks down?

The Worcester Bosch Greenstar CDi Highflow 550 is supplied with a parts and labour warranty of 7 years.


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%

Combi boilers

Choose from the UK’s biggest range of combis

Heat only boilers

The ideal boiler perfect for the largest homes

System boilers

Ideal for 3+ bedroom, 2+ bathroom homes

Boiler quote

Free, no obligation quote from our engineer

Worcester Bosch Greenstar CDi Highflow 550 boiler

We will not be beaten on price -
ask us about our PRICE GUARANTEE!

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%

Considering lots of different factors such as price installed, manufacturer guarantees, energy efficiency, and the likely running cost, we’ve given this Worcester Bosch Greenstar CDi Highflow 550 Combi boiler a rating of 86.62% using our PlumbProud quality scoring system.

We estimate that this Worcester Bosch Greenstar CDi Highflow 550 Combi boiler will cost £3,500 fully installed through PlumbProud provided that the fit is straightforward.

For professional advice on whether the Worcester Bosch Greenstar CDi Highflow 550 is the right boiler for your home or to receive a free quotation, please call 01604 343053 to speak to our friendly team. You are also welcome to email us by clicking here or you can enter your postcode into the quotation box on this page.


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 boiler a standard, combi or system model?

Looking for a gas combi boiler for your flat or house? Then the Worcester Bosch Greenstar CDi Highflow 550 may be an option you should consider.

Boilers traditionally required the installation of one or more large tanks around your property. These were filled with water that was either being heated or was to be heated later. British homes are among the smallest in the world so, to solve the space problem, manufacturers introduced combi boilers in the 1970s to offer homeowners the warmth and hot water supply they needed while taking up much less space.

A combi boiler is designed to heat both radiators and taps on demand and at the same time. Water from the mains passes through a combi boiler and the boiler's technology instantly turns it into hot water. Your boiler then distributes the hot water throughout your home.

The main disadvantage of combi boilers is that they have a maximum water volume capacity. What this means is that, if one person is using the shower while another uses a hot tap simultaneously, less water gets to each area, resulting in a fall in water pressure at both points.

Is the Worcester Bosch Greenstar CDi Highflow 550 combi boiler suitable for my house or apartment?

Whether this Worcester Bosch Greenstar CDi Highflow 550 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.

A boiler’s output is a measurement of the amount of power it can use to provide hot water to your taps and radiators. The higher its output rate, the more water it can heat.

If your new boiler’s output is too low, your hot water might not be as hot as you want it to be. If it's too high, you’ll be paying more for gas than you need to.

The output of the Worcester Bosch Greenstar CDi Highflow 550 combi boiler is 30 kW, so which types of property would this be appropriate for?

Most experienced heating engineers would suggest that the most suitable type of property for installing a Worcester Bosch Greenstar CDi Highflow 550 combi boiler in would be 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.


Where will the Worcester Bosch Greenstar CDi Highflow 550 fit in my house?

The Worcester Bosch Greenstar CDi Highflow 550's dimensions are 850 mm [H] x 600 mm [W] x 600 mm [D].

Wall-hung boilers have been the most popular installation choice over the last 20 years because they're compact, discreet, and don’t take up much space. Yet there are still hundreds of thousands of UK homeowners whose central heating is provided by floor-standing boilers like the Worcester Bosch Greenstar CDi Highflow 550, which they're looking to replace to free up more living space. This is possible, however please be aware that there may be an additional cost if we need to replace your existing pipework.

That said, you should be able to fully recoup your investment within a few years thanks to the quarterly savings you'll make on your gas bills.

It is also important to keep in mind that if you plan to replace an existing heat only or system boiler with the Worcester Bosch Greenstar CDi Highflow 550, your hot water cylinder and/or expansion tank will need to be removed.

Feel free to contact PlumbProud for information and guidance and we'll be happy to provide it.

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

The Worcester Bosch Greenstar CDi Highflow 550 is a condensing gas boiler - this is the type of boiler we recommend to most clients because they're better for the environment and they will save money on annual fuel bills.

A condensing boiler captures and recycles the warmth still present in both the flue exhaust gases and water vapour condensation created when gas is burned to provide your boiler with power.

This means it needs less gas to operate and it uses this extra energy to perform a number of tasks, including heating the colder water that comes back to the boiler from the radiators in your home.

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

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

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.

If you would like your next boiler to help in the fight against climate change, would the Worcester Bosch Greenstar CDi Highflow 550 combi be a suitable 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 CDi Highflow 550 has an efficiency rating of 92% with a SEDBUK grade of "A".

All products that consume energy throughout their lifespan must comply with the Energy Related Products (ERP) Directive.

Companies are legally obliged to reduce harmful gas emissions at all stages of a product's life cycle, from initial manufacturing right through to final disposal as well as when the product is in actual use.

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

If the Worcester Bosch Greenstar CDi Highflow 550 breaks down, will I be covered by the warranty?

The parts and labour warranty on the Worcester Bosch Greenstar CDi Highflow 550 covers all repair-related costs for 7 years while the heat exchange warranty covers you for [Heat Exchange Warranty] 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%
Menu