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Worcester Bosch Greenstar Heatslave II 25/32 boiler

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Plumbproud rating

75.83%

Worcester Bosch Greenstar Heatslave II 25/32 Combi Oil boiler

On the PlumbProud quality scoring system, we rate this Worcester Bosch Greenstar Heatslave II 25/32 Combi boiler 75.83%. To determine our rating, we take lots of different factors into consideration from price installed to manufacturer guarantees, energy efficiency, likely cost of running, and more.

We estimate that, on a standard, non-complicated installation, the supply and fitting charge for this Worcester Bosch Greenstar Heatslave II 25/32 Combi boiler will be around £3,800.

For a free quote on the Worcester Bosch Greenstar Heatslave II 25/32 boiler and to get professional advice and guidance on whether it is the right choice for your home, please enter your postcode in the quote boxes on this page, click here to email us, or call us on 01604 343053.


Installed price around

£3,800

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Worcester Bosch Greenstar Heatslave II 25/32 Combi Oil boiler frequently asked questions

Is the Worcester Bosch Greenstar Heatslave II 25/32 a system boiler, a combi boiler or a regular boiler?

If you’re looking for a combi boiler for your house or flat, then the Worcester Bosch Greenstar Heatslave II 25/32 is one you may wish to consider.

In many properties, combi boilers are more suitable than traditional types of boiler. Combi boilers heat water instantly on demand, which they draw directly from the mains supply, removing the need for storage tanks that can take up valuable space in your home.

A combi boiler is often the right choice for a smaller property, particularly if your home doesn't have a useable loft. As water is heated and delivered immediately rather than being kept warm for hours in an immersion tank, combi boilers reduce oil usage, thereby minimising your heating costs.

The main disadvantage of combi boilers is that they can only heat a certain amount of water at any one time. This means that, if two people are using different taps or showers within your home at the same time, the flow of heated water to each will be reduced, as will the water pressure and temperature.

Is the Worcester Bosch Greenstar Heatslave II 25/32 combi boiler from the Greenstar Heatslave II range a suitable choice for my house or flat?

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 oil than is necessary.

The Worcester Bosch Greenstar Heatslave II 25/32 combi boiler has an output level of 32 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 Heatslave II 25/32 combi would be medium-sized homes and larger apartments containing 10-15 radiators and providing hot water for two bathrooms.

Homeowners considering fitting a combi boiler to their home need to consider flow rates as well as output rates.

The flow rate is a measurement of the volume of water a combi can instantly heat and send to the taps and radiators around your home. The higher the likely demand for hot water in your home, the higher your combi's flow rate should be. This Worcester Bosch Greenstar Heatslave II 25/32 Combi boiler's flow rate is 22 L/m.

Unlike heat only or system boilers, combi boilers don't store hot water in a tank for later use - instead, they draw it directly from the mains. This means that the volume of water your boiler can actually process is constrained by the flow rate of water in the mains pipe.

So, if you choose a combi boiler with a 15l/m flow rate but the flow rate in your mains pipe is 12l/m, the combi boiler's working flow rate is also 12l/m.

Combi boilers are also not always the correct choice for homes with multiple bathrooms, a high number of radiators, or where more than one family member will want to use hot water at the same time.

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 size is a Worcester Bosch Greenstar Heatslave II 25/32 boiler?

The Worcester Bosch Greenstar Heatslave II 25/32 is 855 mm in height, 520 mm in width and 600 mm in depth.

Many homeowners dislike the floor-standing boilers (like the Worcester Bosch Greenstar Heatslave II 25/32) they have in their properties because they feel that they are bulky and take up too much room. If this is you and you want to replace what you have now with a compact, wall-mounted boiler, we can do this for you, although please note that you may need to pay for new piping.

The oil bill savings offered by modern boilers are significant, however, and you should be able to recoup your investment in a few years.

You will need to have your hot water cylinder and/or expansion tank removed if you’re considering replacing your existing heat only or system boiler with the Worcester Bosch Greenstar Heatslave II 25/32.

Please get in contact with PlumbProud for information and guidance on helping you make the right decision for you.

Is the Worcester Bosch Greenstar Heatslave II 25/32 condensing or non-condensing?

The Worcester Bosch Greenstar Heatslave II 25/32 is a condensing oil 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 oil is burned to provide your boiler with power.

This means it needs less oil 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 Heatslave II 25/32 combi a good choice for the environment?

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.

Would installing the Worcester Bosch Greenstar Heatslave II 25/32 combi in your home be an environmentally friendly decision? Let's look closely at the figures.

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 Heatslave II 25/32 was awarded an efficiency rating of 91% 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 Heatslave II 25/32 is "A" for heat and "B" for hot water production.

What is the warranty period on a Worcester Bosch Greenstar Heatslave II 25/32 combi boiler?

The parts and labour warranty on the Worcester Bosch Greenstar Heatslave II 25/32 covers all repair-related costs for 2 years while the heat exchange warranty covers you for [Heat Exchange Warranty] years.


Worcester Bosch Greenstar Heatslave II 25/32 Oil Combi boiler specifications

Powered by GasOil
LocationExternal
Condensing?Yes
Efficiency rating91%
Band ratingA
LPG Compatible?No
P/L Warranty2 Years
Output in kW32 kW
Height855 mm
Width520 mm
Depth600 mm
MountingFloor
Flow rate22 L/m
ERP HeatA
ERP WaterB

The top 10 rated Oil Combi boilers

Using the Plumbproud scoring system, the current 10 ten Oil Combi boilers assessed using a number of important variables are as follows:

1Worcester Bosch Greenstar Heatslave II 12/1876.19%
2Worcester Bosch Greenstar Heatslave II 18/2576.12%
3Worcester Bosch Greenstar Heatslave II External 12/1875.95%
4Worcester Bosch Greenstar Heatslave II 25/3275.83%
5Worcester Bosch Greenstar Heatslave II External 25/3275.58%
6Grant Vortex Pro 2167.46%
7Grant Vortex Pro 2667.43%
8Grant Vortex Pro 26kW67.35%
9Grant Vortex Pro 2167.31%
10Grant Vortex Pro 2667.14%

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Worcester Bosch Greenstar Heatslave II 25/32 boiler

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Worcester Bosch Greenstar Heatslave II 25/32 Combi Oil boiler

  1. Home
  2. Worcester Bosch Greenstar Heatslave II 25/32
Plumbproud rating for this boiler
75.83%

On the PlumbProud quality scoring system, we rate this Worcester Bosch Greenstar Heatslave II 25/32 Combi boiler at 75.83%. To determine a boiler's quality, we consider many different factors from price installed to manufacturer guarantees, energy efficiency, likely cost of running, and more.

This Worcester Bosch Greenstar Heatslave II 25/32 Combi boiler is likely to cost you £3,800 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.

We offer free quotes and professional advice and guidance on whether the Worcester Bosch Greenstar Heatslave II 25/32 is a suitable choice for your home via a phone call on 01604 343053. Alternatively, please click here to email us or enter your postcode in the quote boxes on this page.


Installed price guideline
£3,800

Get your free quote

Worcester Bosch Greenstar Heatslave II 25/32 Oil Combi boiler specifications

Powered by GasOil
LocationExternal
Condensing?Yes
Efficiency rating91%
Band ratingA
LPG Compatible?No
P/L Warranty2 Years
Output in kW32 kW
Height855 mm
Width520 mm
Depth600 mm
MountingFloor
Flow rate22 L/m
ERP HeatA
ERP WaterB

Worcester Bosch Greenstar Heatslave II 25/32 Combi Oil boiler frequently asked questions

What type of boiler is the Worcester Bosch Greenstar Heatslave II 25/32?

If you’re looking for a combi boiler for your house or flat, you may wish to the consider the Worcester Bosch Greenstar Heatslave II 25/32.

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 a Worcester Bosch Greenstar Heatslave II 25/32 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 Heatslave II 25/32 combi's output is 32 kW, so which types of property would this Worcester Bosch Greenstar Heatslave II 25/32 Combi boiler be appropriate for?

A boiler engineer would be likely to recommend that this Worcester Bosch Greenstar Heatslave II 25/32 Combi boiler is capable of providing heating and hot water to 10-15 radiators and two bathrooms and would therefore be most suitable for medium-sized homes and larger apartments.

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 Heatslave II 25/32 Combi boiler's flow rate is 22 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.


Worcester Bosch Greenstar Heatslave II 25/32 size

The Worcester Bosch Greenstar Heatslave II 25/32 is 855 mm in height, 520 mm in width and 600 mm in depth.

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 oil bills.

If you are considering the Worcester Bosch Greenstar Heatslave II 25/32 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.

Worcester Bosch Greenstar Heatslave II 25/32 – condensing or non-condensing?

We recommend that, if possible, you choose a condensing boiler like the Worcester Bosch Greenstar Heatslave II 25/32.

Condensing boilers are more energy-efficient. They achieve this efficiency by capturing the heat present in flue exhaust gases and water vapour condensation and recycling that heat to, for example, warm colder water coming back from your radiators.

By choosing the latest condensing boiler, you'll also notice a significant reduction in your oil bills, particularly if you're replacing a boiler more than 15 years old.

Is the Worcester Bosch Greenstar Heatslave II 25/32 combi rated as environmentally friendly?

As more of us are increasingly concerned about climate change, how we heat our homes and its impact on the environment has become an issue of importance to homeowners.

Around 14% of the greenhouse gases produced in the UK is a result of our central heating systems. Gas boilers are responsible for dangerous levels of nitrogen dioxide emissions in some of our largest cities.

Will installing a Worcester Bosch Greenstar Heatslave II 25/32 combi be a positive contribution to the environment? Let's see what the experts say.

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 Heatslave II 25/32 was rated at 91% with a SEDBUK grading of "A".

The aim of the Energy Related Products (ERP) Directive is to reduce the harmful gas emissions created during a product’s manufacture and active end use right through to its disposal.

The ERP rating for the Worcester Bosch Greenstar Heatslave II 25/32 is "A" for heat and "B" for water.

Does the Worcester Bosch Greenstar Heatslave II 25/32 combi boiler come with a warranty?

Parts and labour charges incurred for repairs made to your new Worcester Bosch Greenstar Heatslave II 25/32 are covered by a 2 year warranty.


The top 10 rated Oil Combi boilers

Using the Plumbproud scoring system, the current 10 ten Oil Combi boilers assessed using a number of important variables are as follows:

1Worcester Bosch Greenstar Heatslave II 12/1876.19%
2Worcester Bosch Greenstar Heatslave II 18/2576.12%
3Worcester Bosch Greenstar Heatslave II External 12/1875.95%
4Worcester Bosch Greenstar Heatslave II 25/3275.83%
5Worcester Bosch Greenstar Heatslave II External 25/3275.58%
6Grant Vortex Pro 2167.46%
7Grant Vortex Pro 2667.43%
8Grant Vortex Pro 26kW67.35%
9Grant Vortex Pro 2167.31%
10Grant Vortex Pro 2667.14%
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