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The Worcester Bosch Greenstar 2000 combi boiler is highly compact (Credit: Worcester Bosch)
The Worcester Bosch Greenstar 2000 is a price-competitive combi boiler that is suitable for most apartments or small to medium homes with a single bathroom. It’s available in two options, either 25kW or 30kW. You can also purchase a Worcester Bosch Greenstar 2000 combi in liquefied petroleum gas (LPG), making it a good option for caravans or static homes.
Worcester Bosch is a real leader in the boiler industry, and this boiler offers all of the efficiencies and reliability you demand from a boiler but at a competitive price. It’s wall-mounted and very attractive, which means you can easily squeeze this boiler between kitchen cupboards.
If you are concerned about noise, as most people in flats or small properties are, you can rest assured that this is one of Worcester Bosch’s quietest boilers, with sound levels of 45dB(a) and a Quiet Mark accreditation to prove it.
The Worcester Bosch Greenstar 2000 contains a c6 heat exchanger (backed with a 10-year guarantee) that can modulate down to 4.8kW during times of low demand. It’s easy to install and maintain, thanks to a removable cleaning cover. If installed with the Greenstar Mini System Filter, you can extend your warranty and the life of your boiler as well – this filter will combat the effects of debris and pollutants in your boiler.
The Worcester Bosch Greenstar 2000 contains a C6 heat exchanger and can modulate down to 4.8kW. Specifying is simple, with maximum flue lengths of 9m (h) and 12m (v). The Greenstar Mini System Filter was designed to combat the damaging effects of debris and pollutants, protecting your boiler and extending the product’s lifespan. The heat exchanger is easy to service, thanks to a removable cleaning cover, and comes with a 10-year guarantee. The fan is easy to maintain as well – it can be removed with just one screw.
Guarantee options: The Worcester Bosch Greenstar 2000 comes with a five-year standard warranty and a six-year guarantee when installed with the Greenstar System Filter. The primary heat exchanger carries a 10-year guarantee.
Price range: £1,530–£2,150
Efficiency rating: A
Output rating: 25–30kW
Highlights: Despite being highly compact, the Worcester Bosch Greenstar 2000 combi boiler comes with multiple features, including horizontal and vertical pipe options, easy maintenance and ultra-quiet 45dB(a) operation.
Key benefit: A C6 heat exchanger can modulate down to 4.8kW and deliver a 35-degree hot water temperature rise.
Fuel: Gas, 20% Hydrogen blend
Flow Rate: 12l/min
Pros and cons
While the Worcester Bosch Greenstar 2000 is small and affordable, it’s still a big investment. It’s important to consider whether or not it meets all of your heating and hot water needs (as well as your pocket) by weighing up the pros and cons.
Compact size: The Worcester Bosch Greenstar 2000 is wall-mounted, with compact dimensions (400mm (w) x 724mm (h) x 300mm (d)) that can be hidden from view in a kitchen cupboard with ease.
Affordability: As anentry-level boiler, it’s a highly accessible boiler for most homeowners and one of the most affordable offered by Worcester Bosch.
Quiet: With sound levels of 45dB(a) operation, this boiler is very quiet and won’t disturb occupants, even in a small home.
Sleek design: The Worcester Bosch Greenstar 2000 combi boiler is sleek and small. It won’t stick out or be an eyesore in your home.
Warranty: The Worcester Bosch Greenstar 2000 combi boiler comes with a five-year standard warranty, a six-year guarantee when installed with the Greenstar System Filter and a 10-year guarantee on the C6 primary heat exchanger.
Energy efficiency: The Worcester Bosch Greenstar 2000 boiler is A-rated for energy efficiency with a seasonal efficiency rating of 93% for central heating and hot water.
Flow rate: With a flow rate of 12 litres per minute, you may find filling a bath a little slower than many other boilers.
Pressure dependent: Combi boilers aren’t suited to low-pressure areas. If you suspect your home has low water pressure, you should consult your installer about adding a booster pump.
How does the Worcester Bosch Greenstar 2000 combi boiler work?
Combi or combination boilers are typically wall-hung units that take cold water directly from the mains water supply, delivering hot water on demand and central heating from a single unit. Because they don’t require a hot water cylinder, these boilers are smaller and easier to install. They are also highly energy efficient, reducing your heating bills – and your carbon footprint. This makes combi boilers a convenient and affordable choice for many homeowners.
System boilers, on the other hand, use a hot water storage cylinder. Water is heated in the cylinder, where it is stored and kept warm until needed. This enables your system boiler to provide hot water to multiple taps/showers at the same time, which combi boilers struggle to do effectively.
The Worcester Bosch Greenstar 2000 combi boiler is wall-mounted and very simple to maintain. (Credit: Worcester Bosch)
How does the Worcester Bosch Greenstar 2000 compare to other combi boilers?
There are several compact combi boilers on the market that you should consider if you like the Worcester Bosch Greenstar 2000.
The Ideal Logic+ Combi is a good option, delivering speedy heating and hot water while tucked away in a kitchen cupboard. The boiler is supported by the Queen’s Award for Enterprise (2013) and the Good Housekeeping Reader Recommended Status (2013, 2017). It comes in 24kW, 30kW and 35kW options. Pricing (with installation and sundries included) is roughly £1,679–£2,311.
We also like a close competitor of Worcester Bosch, the Viessmann Vitodens 100-W. It’s available as 24kW, 30kW and 35kW, with a flow rate of 14.5 litres per minute for the more powerful model. It’s highly energy efficient, compact and low maintenance. Pricing with installation is around £2,092–£2,592.
There’s also the option of the Alpha E-tec, one of the smallest boilers produced by Alpha. It’s available as a 28kW or 33kW unit. The 28kW unit has a seasonal efficiency of 93%, ERP A-rating and a high flow rate of 12.1 litres. Expect to pay between £1,545–£2,045 for this unit, with installation and sundries.
How much does a Worcester Bosch Greenstar 2000 combi boiler cost?
The price of the boiler may vary between suppliers (keep a lookout for online specials), but according to online specials, you can expect to pay the following for a Worcester Bosch Greenstar 2000 combi boiler:
Worcester Bosch Greenstar 2000 Combi Boiler
£730 (25kW)–£850 (30kW)
Installation (including VAT)
Sundries (filter, flue)
Maintaining a Worcester Bosch Greenstar 2000 combi boiler
To keep your boiler running smoothly, it’s a good idea to perform regular checks. Luckily the control panel should display all of the information you need. Make sure that your temperature gauge is set correctly and that your boiler pressure is at a normal level. If there’s an error code displayed, look this up in your user manual or call Worcester Bosch for support.
The Worcester Bosch Greenstar 2000 is an impressive little boiler for its size. It will fit into the smallest of kitchens with ease, with Quiet Mark-accredited low noise levels, easy installation and high energy efficiencies to boot.
During times of low demand, it will use less energy, and when it does run, it does so at 93% efficiency, meaning very little gas is wasted.
A 25kW combi model is a good option for small homes with one bathroom. If you need a little more power, the 30kW is better suited to medium-sized homes with single bathrooms.
Its reliability and attractive design, warranty and ease of maintenance make the Worcester Bosch Greenstar 2000 a great solution for landlords that want to keep tenants happy without breaking the bank. It’s also a good option for caravans and holiday parks.
What the professionals say
“The Worcester Bosch 2000 is the brand’s new, entry-level (budget) boiler, ideal for those looking for an industry-leading boiler at a competitive price. It’s both compact and officially recognised as the brand’s quietest boiler, hence why it’s perfect for small homes with one bathroom, exactly what it was designed for. A common concern in small properties is noise, so it’s reassuring to know that this boiler will operate without causing a scene. Its compact dimensions also mean it can be installed in small spaces, ideal for properties with limited space. For example, it can be installed between kitchen cupboards and won’t typically stick out. The 2000 offers the same contemporary design and feel as its more expensive big brother, the 8000, so if you want a boiler with a more refined aesthetic, the 2000 is a good option.”
“Worcester Bosch is a household name, and for a good reason. The Greenstar range has won the coveted Which? Best Buy award for several years. Worcester Bosch has developed a reputation as a reliable boiler brand across the UK over the last few decades. The company has an ‘Excellent’ rating on TrustPilot, based on nearly 20,000 reviews at the time of writing, and is known for quick customer service. However, whilst you may know the Worcester Bosch name and the heritage of this manufacturer both before and after its acquisition by the Bosch Group, we should be clear that this is a boiler that is filled with components from many different manufacturers. The issue here is that these components aren’t optimised to work together in the same way that the components in boilers made completely by one manufacturer are.”
“The Worcester Bosch 2000 series is ONLY available as a combi boiler; there are no system or regular versions of this boiler. It is designed to offer customers a more affordable version of the Worcester Bosch Life 8000 series by scaling down some of the features that not everyone will care about. The 2000 series is also only available in a 25 & 30kW model, which is suitable for small and medium homes with one bathroom. If you have a large home with over 15 radiators or two bathrooms that will be used simultaneously, then the 2000 series probably won’t have the power you need for your system. The Worcester Bosch 2000 series is the quietest boiler manufactured by Worcester Bosch, with an ERP rating of 43dB, which is quiet for an appliance. So if the boiler is located in a living area such as the kitchen, then this is an excellent option.”
“My new boiler is more efficient than my old one; glad I chose the Worcester Bosch Greenstar 2000. It is easy to use if needed and a lot quieter than my old one, which was a different make. I would recommend this boiler.”
“This boiler was the correct, small capacity for my house and was installed quickly with minimum fuss by a local installer. Unfortunately, the pipework connections were not the same as the previous Worcester Bosch boiler, so plumbing modifications had to be made. So far, the boiler has performed faultlessly, as one would expect from a new appliance. Please contact me again in fifteen years for a proper assessment. This is a combi boiler, and it takes an age and lots of wasted water to get hot water to the bathroom taps. To some extent, this is the fault of the plumbing in the house.”
In order to evaluate the performance, reliability and design of the Worcester Bosch Greenstar 2000 combi boiler, we read dozens of customer reviews, professional opinion pieces, brochures and technical documentation. We then compiled a scoring system comprising the following:
The warranty period offered by the brand, for a total of 10 points;
The overall reputation of the brand as based on online reviews, for a total of 15 points;
Trustpilot reviews for a total of 5 points;
Awards and accolades (e.g. Which? Best Buy Awards) for a total of 5 points;
Customer service performance, for a total of 10 points;
The price range, for a total of 15 points;
Efficiency ratings, for a total of 15 points;
Installation and maintenance network and reviews, for a total of 15 points; and
Overall performance (temperature, maximum flow) for a total of 10 points.