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Worcester Bosch

Which Worcester Bosch boiler?

If you’re shopping for a new boiler, you’re bound to have seen loads of glowing reviews for Worcester Bosch boilers. After all, they’re the current market leaders for domestic boilers.

Which? has regularly praised and recommended Worcester Bosch for both their gas and oil boiler ranges. In the Which? Best Boiler Brand Survey 2020, they said: 

‘Worcester Bosch performs so consistently well in our annual reliability surveys that its name is synonymous with dependability.’

In their Survey in 2021, Worcester Bosch was awarded an overall score of 84%, ranking first place out of the 16 boiler brands that scored within the survey. 

They were given 5 stars out of 5 for reliability and brand customer score, and 4 stars out of 5 for their overall brand engineer score.

If you think a Worcester Bosch boiler might be for you, but you’re confused about which type or model you need, then this blog’s for you!

In this handy guide, we outline the three different types of boiler that Worcester Bosch offer, and compare some of the popular models within those ranges. Hopefully this will give you a better idea of what might be a good option for you.

For tailored advice on your needs, contact one of our friendly team at The Heating People to book your free survey.

Which Worcester Bosch boiler? – Combi boilers

Worcester Bosch have a wide range of combi boilers ranging from their design-led Lifestyle range, to a compact range to fit in your kitchen cupboard.

What is a combi boiler?

A diagram of a combi system in a house.A combi boiler provides a ‘combination’ of heating and hot water from one compact unit, without the need for any additional water storage tanks or hot water cylinders.

A combi gets its cold water supply directly from the mains, and heats it instantly on demand. The hot water is supplied directly to your taps and radiators, without storing it first.

This makes combi boilers efficient because you never pay for more hot water than you use, and there is no heat loss from storing hot water in a cylinder for later use.

However, the main drawback to a combi is that they struggle to meet a high demand for hot water, because they are heating it instantly.

In larger homes with a higher demand for hot water, a system or heat-only boiler is a better option – we cover these two types later on.

You can read the pros and cons of combi boilers here.

Worcester Bosch Greenstar 2000 combi boiler

A Worcester Bosch Greenstar 2000 boilerThe Greenstar 2000 is the lowest priced combi boiler offered by Worcester Bosch, and they describe it as: ‘The best boiler not very much money can buy’.

It’s only available as a combi boiler, unlike many of the other combis which are also available in system and heat-only versions.

The Greenstar 2000 was designed to be a price competitive combi boiler, and is only available in two output sizes of 25 and 30kW. This makes it suitable for apartments, small and medium sized homes with one bathroom.

It’s been designed to provide an attractive solution that comfortably fits between standard kitchen cupboards. It looks similar to the Greenstar 8000, and it’s basically a scaled down version.

Key benefits of the Greenstar 2000:

  • Guarantee of up to 6 years when installed by a Worcester Bosch Accredited Installer
  • Perfect for small to medium sized homes with one bathroom
  • Worcester Bosch engineered quality at an affordable price
  • Compact enough to fit between wall-mounted kitchen cupboards (724mm x 400mm x 300mm.
  • Incredibly quiet when in use
  • Attractive design with push-button LCD display
  • Innovative ‘Quick Tap’ water saving function helps you reduce water waste
  • Peace of mind with a 10 year guarantee on the primary heat exchanger
  • Endorsed with a Which? Best Buy, because it is an easy to operate, affordable and high quality boiler.

Worcester Bosch Greenstar 4000 combi boiler

Worcester Bosch Greenstar 4000The Greenstar 4000 is Worcester Bosch’s mid-range boiler, sitting between the Greenstar 2000 and The Greenstar 8000 boilers.

What strikes you immediately is that it’s very similar in appearance to the sleek Worcester Bosch Greenstar 8000 Life and Style models, but is cheaper. It also has a pioneering control display which is similar to the 8000 Style.

The Greenstar 4000 is available in output sizes of 25 kw and 30kw, making it ideal for small to medium sized homes with one bathroom.

The Greenstar 4000 is one of our top five combi boilers because it has a wide power range to meet all of your heating and hot water needs, whilst doing so efficiently.

It has a 1:10 modulation range that reduces gas consumption, energy bills and wear and tear on components – the 25 and 30kW combi boilers can modulate down to just 3kW!

Key benefits of the Greenstar 4000

  • Guarantee of up to 10 years when installed by a Worcester Bosch Accredited Installer
  • Suitable for small to medium homes
  • The modern new design comes with an easy to use colour display
  • Hot water flow rates up to 12.3 l/min
  • Innovative ‘Quick Tap’ water saving function helps you reduce water waste
  • Wide power range helps to reduce gas consumption and lower energy bills
  • Operates extremely well in low water pressure areas
  • Features wireless connectivity with the Bosch EasyControl smart thermostat
  • Features SimpleSwitch tech

Worcester Bosch Greenstar 8000 Life combi boiler

We’ve dedicated an entire blog to the Greenstar 8000 LifeStyle range, which you can read here.

But we’ll summarise some of the key features for you again – starting with the Life.

Building upon the award-winning Greenstar CDi Classic, the Greenstar Life range features a modern new design and a whole host of benefits designed to make looking after the heating and hot water in your home easy.

The Greenstar Life is part of Worcester Bosch’s most powerful wall hung combi boiler range, with upgraded controls and wireless connectivity.

But what you can’t fail to notice is the sleek, modern look of these boilers. They look more like an iPhone than a boiler, so you’ll no longer want to hide it away in a cupboard!

The Life is available in gloss white, but with the Style, you can also choose gloss black – an industry first!

But as well as being pretty, it’s powerful. Both Lifestyle boilers are available in outputs of up to 50kW for combi boilers, making them the most powerful wall hung combi boilers on the market.

This means that they’re suitable for larger properties with multiple bathrooms, and a high demand for hot water.

Key benefits of the Greenstar 8000 Life 

  • Guarantee of 12 years when installed by a Worcester Bosch Accredited Installer
  • Power outputs of up to 50kW
  • Ideal for larger homes with more than one bathroom
  • Modern new design
  • Improved boiler display screen with easy to push control buttons
  • Optional unique Intelligent Filling System
  • Wireless connectivity with the Bosch EasyControl smart thermostat

Worcester Bosch Greenstar 8000 Style combi boiler

The second offering in the Lifestyle range, is the Greenstar 8000 Style, and it’s the premium offering from Worcester Bosch.

Building upon the foundations of the Greenstar range, the range Style combi features a new design, more power and even greater connectivity.

The Greenstar 8000 Style has been nicknamed ‘the beautiful beast’ by Worcester Bosch, who describe it as “a new benchmark in premium quality heating and hot-water provision.”

Capable of power outputs of up to 50kW, the Greenstar Style range is perfect for homes of any size, with the power to comfortably heat large homes with two or more bathrooms.

The 50kW Style has the highest water flow rate of any wall-hung combi boiler on the market, with a hot water tap flow rate of 20.3 litres per minute at 35 degrees or 17.9 litres per minute at 40 degrees.

The Style is available in gloss black or gloss white, and features a sleek full colour touch screen display.

Key benefits of the Greenstar 8000 Style:

  • Guarantee of 12 years when installed by a Worcester Bosch Accredited Installer
  • Power outputs of up to 50kW
  • Ideal for larger homes with more than one bathroom
  • Available in either gloss black or gloss white
  • Easy-to-use full colour touch screen display
  • Optional unique Intelligent Filling System
  • Wireless connectivity with the Bosch EasyControl

Worcester Bosch system boilers

Many of the Worcester Bosch combi boilers which we’ve talked about above, are also available as system boilers.

So, if you liked the sound of the Greenstar 4000 or 8000 boilers, but you need a system boiler, you’re in luck!

What is a system boiler?

A system boiler is similar to a combi in that it takes its cold water supply directly from the mains, but unlike a combi, it heats water and stores it in a hot water cylinder until it’s needed.

Since system boilers store a large quantity of hot water, they can supply multiple outlets at the same time. This makes it the ideal choice for a home with multiple bathrooms.

You can read the pros and cons of system boilers here.

Worcester Bosch Greenstar 4000 system boiler

The popular Greenstar 4000 is available as a system boiler in 12kW, 15kW, 18kW, 21kW and 24kW outputs.

Just like with the combi boiler, you’ll benefit from its 1:10 modulation range that reduces gas consumption, energy bills and wear and tear on components. The 12kW system can modulate down to just 1.9kW!

As with the combi version, this boiler is available with a guarantee of up to 10 years when installed by a Worcester Bosch Accredited Installer.

Worcester Bosch Greenstar 8000 Life and Style system boilers

The Worcester Bosch Greenstar 8000 Life and Style boilers are available as system boilers in 30 and 35 kW power outputs.

It’s worth noting that the Life and the Style are available with more power (up to 50 kW) in the combi and heat-only models, but not as system boilers.

As with the other versions, the 8000 Life and Style system boilers are available with extended guarantees of up to 12 years when installed by a Worcester Bosch Accredited Installer.

Worcester Bosch heat-only boilers

Worcester Bosch also offers its popular combi models as heat-only boilers too.

So if you’ve got a high demand for hot water and want to replace an existing boiler without updating your entire heating system, Worcester Bosch has got you covered.

What is a heat-only boiler?

A heat-only boiler is also known as a regular or conventional boiler. They are seen as being the traditional way of heating a home. They are usually installed as part of an unvented system, but they can be sealed too.

Heat-only boilers require the most space in your home. In addition to the boiler itself, there is a cold water cistern (sometimes called a header tank); a small feed and expansion tank; and a hot water storage cylinder.

Since they store hot water (like a system boiler) they also lend themselves nicely to homes with a high demand for hot water.

You can read the pros and cons of heat-only boilers here.

Worcester Bosch Greenstar 8000 heat-only boiler

If you liked the look of the Worcester Bosch Greenstar 8000 Life combi boiler, but you need a heat-only boiler, you’re in luck!

The Greenstar 8000 Life is available as a heat-only boiler in 30kW, 35kW, 40kW, 45kW, and 50 kW power outputs.

As with the combi and system versions, it’s available with an extended guarantee of up to 12 years when installed by a Worcester Bosch Accredited Installer.

Worcester Bosch Greenstar Ri heat-only boiler

Another good option in the heat-only range is the Worcester Bosch Greenstar Ri.

The Greenstar Ri is a compact, wall mounted boiler that is perfect for medium and large-sized homes.

Small enough to be installed in a standard kitchen cupboard, this boiler can be used with Worcester Bosch’s range of high efficiency Greenstore cylinders for a complete Worcester system solution for your home.

The Greenstar Ri is available in 27kW and 30kW and comes with a guarantee of up to 10 years when installed by a Worcester Bosch Accredited Installer.

Key benefits of the Worcester Bosch Greenstar Ri heat-only boiler

  • Guarantee of up to 10 years when installed by a Worcester Bosch Accredited Installer
  • Perfect for medium and large sized homes
  • Compact enough to fit in a standard kitchen cupboard
  • Simple boiler control knob
  • User-friendly displays for ease of use
  • Can be used with Greenskies solar panels for energy and cost savings
  • Choice of controls enables greater comfort and economy

Which type of Worcester Bosch boiler do I need?

A man looking at different doors.If you’re confused about what type of boiler you need, you should start by thinking about your heating and hot water needs.

Remember that your circumstances might have changed since your last boiler was installed, and you might even have inherited the boiler when you moved in!

Just because your home has a particular type of boiler now, doesn’t mean that you’re stuck with it. You should consider whether you want to replace like-for-like, or whether you want to take the opportunity to change to a different type of boiler altogether.

For example, if you currently have a combi, but have found that it’s now struggling to meet the hot water demands of your growing family, a system or heat-only boiler might be a better option for you.

The Heating People will be able to advise you on your best option as part of your free survey.

What size of Worcester Bosch boiler do I need?

Worcester Bosch Greenstar 8000 next to a ruler and a question mark.If you’ve read our related blog: What size boiler do I need? – you’ll know that when we talk about the size of a boiler, we’re talking about its power output rather than its physical dimensions.

Generally, the greater your heating and hot water demand, the larger the kilowatt output tends to be. People often make the mistake of oversizing their boiler, but this is a costly mistake.

To get the perfect size of boiler for your needs, The Heating People conduct a heat loss calculation as part of your free survey.

And as we’ve seen, Worcester Bosch provides boilers for the entire spectrum, ranging from 9 kilowatts to 50 kilowatts, so whatever your needs, there will be an option for you.

 Useful links:

Worcester Bosch: Choosing the right boiler

Which? Boiler reviews: Worcester Bosch brand

Worcester Bosch Greenstar 2000