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Worcester Bosch Greenstar 4000 versus Greenstar i

When you’re on the hunt for a new boiler, it can be a daunting task. There are lots of different manufacturers out there, each with their own vast array of models to suit every home and lifestyle. Not only that, but the different models of boiler often have baffling names involving seemingly meaningless numbers and letters. We often get asked about how the new(ish) Worcester Bosch Greenstar 4000 compares to its much-loved predecessor, the Worcester Bosch Greenstar i. So, if you’re wondering whether this new offering will make you as happy as your old Greenstar, this blog’s for you!

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Wondering how the Worcester Bosch Greenstar 4000 compares to the old Worcester Bosch Greenstar i? …

When you’re on the hunt for a new boiler, it can be a daunting task.

There are lots of different manufacturers out there; each with their own vast array of models to suit every home and lifestyle.

Not only that, but the different models of boiler often have baffling names involving seemingly meaningless numbers and letters.

But don’t worry, The Heating People are here to help!

We’re experts at helping you to choose the perfect boiler for your needs. Which will keep you and your family comfortable, whilst helping you save money on your energy bills.

And although we’re Worcester Bosch Accredited Installers, we’re not tied to Worcester. We are accredited installers of many boiler brands. And we always provide completely impartial, expert advice.

If you’re wondering whether the Worcester Bosch Greenstar 4000 will make you as happy as your old Greenstar i; this blog’s for you!

Who is Worcester Bosch?

A Worcester Bosch Greenstar boilerEven if you’re not aware of their different models; we’re willing to bet that you’ve heard of the boiler manufacturer, Worcester Bosch.

Worcester was originally founded in 1962 and became part of the Worldwide Bosch Group in 1996.

They’ve been a market leader in domestic boilers for the last 50 years. Because they boast a large product range offering reliability and fantastic warranties.

Worcester Bosch doesn’t just produce gas and oil boilers though. Their product range also includes hot water cylinders; renewable technologies such as heat pumps and solar water heating systems; as well as controls and accessories.

You might like our related blog: Why choose a Worcester Bosch boiler?

Why choose a Worcester Bosch boiler?

If you’re wondering why so many people opt for a boiler from Worcester Bosch; here are some of the benefits of this brand:

1.    Worcester Bosch is a highly reputable company

The Worcester Bosch Group has built up a solid reputation for quality over the last 50 years.

Which? has shown their high regard for Worcester Bosch by giving them the highest brand score for nine years running.

In the Which Best Boiler Brands Report in 2020, Which? said:

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

2.    Worcester Bosch has a huge product range

Part of the reason we’ve written this blog is because there are so many different types of Worcester Bosch boilers to choose from!

Their extensive product range means that they’ll have a boiler to suit your home and lifestyle. Whether you’re looking for a heat-only system, a combi boiler or a system boiler.

3.    Worcester Bosch is highly rated by customers

Feedback from customers is consistently positive for Worcester Bosch, indicating a high level of customer satisfaction.

YouGov have ranked Worcester Bosch as the UK’s best value boiler brand; the most recommended boiler brand; and the best quality boiler brand.

4.    Worcester Bosch boilers come with hefty guarantees

Worcester Bosch provide hefty 10-year warranties. So you can have the peace of mind that should anything go wrong, you’ll be covered.

Since The Heating People are Worcester Bosch Accredited Installers, we’re able to offer extended 12 year guarantees on some models.

But remember that you’ll need to keep up with annual servicing by a Gas Safe engineer to maintain your guarantee.


5.    Worcester Bosch boilers are energy efficient

Worcester Bosch hydrogen ready boilerAll Worcester Bosch boilers are ErP (Energy-related Products) A-rated.

And according to Worcester Bosch; adding a Bosch EasyControl internet-connected Smart controller to their Greenstar range; can further boost your heating system efficiency to an impressive 98% (also known as A+).

As well as being environmentally friendly, energy efficient boilers can save you money on your energy bills.

A-rated boilers are over 90% efficient. This means that over 90p of every £1 you spend on fuel is used for your heating and hot water.

With older G-rated gas boilers; only 70p (and sometimes less!) in your £1 is used where it should be, the rest is wasted.

This can make a huge difference to your bills. After all, your boiler is responsible for over 60% of your household’s annual energy costs. And that’s something to think about, given the current price of gas!

You might like our related blog: How to choose an energy efficient boiler.

6.    Worcester Bosch spare parts are easily available

Since Worcester are based in the UK and their boilers are very popular; securing parts should anything go wrong is usually straightforward.

How much do Worcester Bosch boilers cost?

Worcester Bosch gas boilers cost between £570 and £1,500, depending on their type and size.

How do I buy a Worcester Bosch boiler?

You can’t buy Worcester Bosch boilers directly from Worcester Bosch. Instead, you need to have one supplied through a Worcester Accredited Installer, such as The Heating People.

We specialise in Worcester products and can offer extended guarantees.

What boilers does Worcester Bosch offer in its Greenstar combi range?

Combi boilers produce both heating and hot water on demand, without the need for a cylinder.

All the Greenstar combis are designed to provide high levels of performance and operating efficiency. The combi boilers in this range include the Greenstar:

Some of the appealing features about the Greenstar range is that Worcester have created: a freeze-proof condensate pipe; a low energy pump that reduces electrical consumption; and instantaneous hot water.

The old Greenstar i Series

Prior to the introduction of the Greenstar 4000, Worcester’s most popular combi boiler was the Greenstar i. The Greenstar i is no longer in production, but there are still some in the supply chain.

The Greenstar i was a very popular boiler because it suited small to medium sized homes with one bathroom; and the controls were straightforward.

Worcester Bosch describes the 4000 as being ‘instantly familiar and yet totally transformed’; since it was built on the old tried and tested model.

The 4000 is an improvement on the i in terms of the speed and ease of installation; commissioning and servicing; alongside improvements in efficiency and control.

What are the improvements with the Worcester Bosch Greenstar 4000?

Let’s look at why the 4000 is better than its predecessor…

More compact

WB, worcester bosch, greenstar, greenstar 4000, 4000

The Worcester Bosch Greenstar 4000 has smaller dimensions than its predecessor; having been designed to fit within kitchen cupboards and airing cupboards. This gives you more options in where you would like to install your boiler.

Super stylish

What you can’t help but notice about the Worcester Bosch 4000 is its sleek and stylish design.

It’s very similar in appearance to the sleek Worcester Bosch 8000 LifeStyle boiler.

Featuring curved edges, and LCD digital display; it’s a far cry from the dull white box we expect from a boiler!

It’s quiet

Worcester Bosch Greenstar 4000The Worcsetr Bosch Greenstar 4000 is 10% quieter than the Greenstar i, so it’s whisper quiet!

High hot water flow rates

The 4000 can produce up to 12.3 litres of hot water out of your tap in a minute. And operates extremely well in low water pressure areas; ensuring powerful and warm showers.

With full flow rates from just 1 bar of pressure; they’re a great choice if you live in a high rise building or area with low mains pressure.

Improved energy efficiency

The Worcester Bosch Greenstar 4000 is ErP A-rated, with an impressive 94% efficiency.

And according to Worcester Bosch, adding a Bosch EasyControl internet-connected Smart controller; can further boost your heating system efficiency to 98% (also known as A+).

SimpleSwitch feature

If you’re thinking of upgrading your old Greenstar 30i to theWorcester Bosch Greenstar 4000; the latest SimpleSwitch feature means that replacement is even easier.

Frozen condensate protection

The 4000 has a condensate pipe which is specially designed so that it doesn’t freeze when the temperature drops in winter.

This means that you can avoid problems with your boiler going off due to frozen pipes. 

Intelligent filling system

If you regularly experience problems associated with your boiler pressure dropping; you’ll appreciate the intelligent filling system of the Worcester Bosch Greenstar 4000.

This feature helps to maintain optimum boiler pressure – consistently and reliably.

In summary…

If you liked the old Greenstar i; you’ll definitely like the new Greenstar 4000, which is following in the footsteps of its best-selling predecessor.

The main differences are the new and improved sleeker look, and the compact size.

The combi boiler options also offer a higher flow rate of 10.2 and 12.3 litres a minute; which is good news for your showers.

Check out our related blog: Worcester Bosch Greenstar 2000.

For a free, fixed price quotation, call The Heating People today to book your survey. We can offer a guarantee of 10 years on this model.

Useful Links:

Worcester Bosch boiler range

YouGov Worcester Bosch

Which? Reviews Worcester Bosch