Worcester Bosch Greenstar 1000 Review & Price Guide

James Elston
Written by James Elston
Updated on 17th May 2024
Posted on 16th May 2024
worcester bosch greenstar 1000 combi boiler review

Worcester Bosch Greenstar 1000 Combi Boiler For Lower Budgets

Are you on the boiler hunt for an affordable, space-saving central heating solution that doesn’t compromise on quality?

worcester bosch greenstar 1000 combi boiler review

Look no further than the latest brand new boiler for Autumn 2023, the Worcester Bosch Greenstar 1000 combi boiler.

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This innovative boiler not only offers the renowned Worcester Bosch boilers quality on the inside but also boasts a sleek and stylish exterior design.

Plus, it’s tailor-made for easy installation in compact homes and perfect for a kitchen cupboard. Let’s learn about the new Worcester Greenstar 1000 and why it’s the go-to choice for price and space-conscious homeowners.

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Worcester Bosch Greenstar 1000 combi boiler overview

The 24kW combi boiler generates 24kW of heat and an impressive flow rate of 8.5 litres per minute. Ideal for snug spaces like small 1 to 2-bedroom homes and flats.

For larger properties with increased hot water demand, there is the Greenstar 1000 30kW combi boiler with a hot water flow rate of 10.5 liters per minute.

Choosing the right output when looking for new boilers for your home is key to energy efficient heating.

Worcester Bosch 1000 Pros and Cons


  • Available in 24kw and 30kw versions
  • Worcester Bosch’s budget model
  • Super compact with dimensions 655mm x 395mm x 285mm
  • Offers a 5-year warranty on parts and labour (7 years with Boiler Central)
  • Very quiet boiler for the price
  • Compatible with various Worcester Bosch controls
  • Ideal for small to medium-sized homes with 1 bathroom
  • Equipped with a stainless steel heat exchanger
  • ErP rating of 94%: A-rated


  • Not suitable for larger homes
  • 5 years warranty could be better in comparison to others in the same price bracket
  • New boiler so no history of how reliable it is yet

Worcester Bosch 1000 Features & Best Bits

Worcester Bosch stands probably the most well-known boiler brand in the UK. Although they have the Worcester 4000 and Worcester 8000 at much higher prices, the Worcester Bosch 1000 is a great compromise and offers an economical yet very reliable choice.

Compact boiler for kitchen cupboards

If you are looking specifically for a Worcester Bosch boiler because you know they’re a pretty good brand then you will be glad to know that the Greenstar 1000 is a marvel of modern engineering.

worcester 1000 internal components view

We think it’s everything you could want. It’s lightweight, easily serviceable, and compact, making it the ideal heating solution for all our customer’s homes where space is at a premium and looking for a boiler for a kitchen cupboard or other tight nooks and crannies.

This wallet friendly budget combi boiler effortlessly slides into a standard 300 mm-deep cupboard, ensuring it won’t waste valuable space in your home.

Not only does it save space, but it also saves you money – a winning combination.

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QuickTap Feature for Water Efficiency

This is a recent addition to new Worcester Bosch boilers, and they’ve even given it to the baby of the range, meaning the Greenstar 1000 doesn’t just stop at saving space and money; it’s also a champion of water efficiency.

worcester 1000 front view

Who doesn’t like to know they’re saving water and money if you’re on a water meter?

With its innovative QuickTap feature, you no longer need to waste water while waiting for it to heat up.

You can simply turn your hot tap on, then off again, wait 20 seconds and voila! you can enjoy instant access to hot water and reduce your water consumption, contributing to both your wallet and the environment.

Five Years Guarantee for Peace of Mind

Every Worcester bosch boiler comes with a guarantee rather than a warranty, the main difference being that Worcester Bosch guarantee to fix your problems, rather than offer a warranty with potential loopholes.

When you invest in the Greenstar 1000, you’re not just buying a boiler; you’re securing five years of peace of mind. This guarantee ensures that your heating needs are met without any worries for half a decade.

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Worcester Bosch Quality at an Affordable Price

Experience the unbeatable combination of Bosch quality and price. The Greenstar 1000 offers excellent performance and design at an affordable price.

It demonstrates Bosch’s dedication to providing cutting-edge appliances that meet your demands without sacrificing quality, making it the ideal choice for people looking for greatness without the costly price tag.

Upgrade your house with the Greenstar 1000 and experience the reliability and creativity for which Bosch is well-known, all while staying within your budget.

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Worcester Bosch 1000 Installation

One for the fitters, installing the Greenstar 1000 is about as easy as it gets according to Worcester.

This is mainly down to its purposely lightweight construction, meaning it can be easily picked up and put on a wall by one person.

This lightweight boiler comes in at a measly 26kg so there is no need for heavy lifting or any worries when it comes to the complex installations where manoeuvrability is key.

Quality, Beauty, and Economy Combined

The Greenstar 1000 comes with a one-box design. Ease of use is paramount with the lovely access through the front panel to all main important bits and components that an engineer would likely need to get to, including the primary heat exchanger.

You must get this boiler serviced every year as per the Ts and Cs to prevent you from invalidating your warranty – see our Boiler Central service plans.

Therefore, this feature simplifies installation and boiler servicing, making it a go-to choice for Gas Safe registered heating professionals.

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Installer-Friendly Connections

All hydraulic connections are conveniently in-line and positioned just 35mm from the appliance’s rear. Additionally, like they always do with things such as simple switch, Worcester have thought of everything therefore, a gas pipe tail is provided for centralising the connection, and the PRV (Pressure Relief Valve) is perfectly located for easy access during the often tricky boiler installation process.

Efficient Condensate Trap

Want to save money on your bills, well you’ll be glad to know that this is a condensing boiler hence the Greenstar 1000’s condensate trap features a simple push-fit connection and can be easily removed.

External termination of condensate is flexible and possible up to 3m with insulated pipe (the bit that often gets frozen in winter)

Worcester Rear Spacer Frame Accessory

We know that time is of the essence, especially when you likely have to wait for the gas engineer to fit your boiler before you can have a red hot shower or bath.

Therefore, for as with most gas boilers that are wall mounted, Worcester have added a 35mm space behind the boiler which aids vertical piping.

This excellent solution to a well known problem ensures quicker and neater installations, making the Greenstar 1000 a preferred choice among Gas Safe and heating professionals.

Luckily most combi boiler installations are completed in less than 1 day so this will ensure that you are without hot water and heating for as little time as possible.

Looking for something with a bit more? Check out the latest prices of the Worcester Bosch boiler range here.

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Worcester Bosch Greenstar 1000 30kW combi boiler Review

The most powerful in the range so far is the Greenstar 1000 30kw combi. this is one of the most popular, if not the most popular output in the UK, as it is suitable for most homes with up to 3 bedrooms and 1 bathroom.

Take a look at the different options so you can decide which boiler is best to install in your home.

Greenstar 1000 30kw specification

Boiler ModelWorcester Bosch Greenstar 1000 30kw
Dimensions (mm)655 x 395 x 285 HWD
Hot water output30kW
Central heating output24kW
Flow rate10.8 l/min (40°c)
Erp RatingA
Warranty5 Years
Modulation ratio1:5

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Worcester Bosch Greenstar 1000 24kW combi boiler review

Currently the smaller output option the, less powerful Greenstar 1000 24kw combi boiler is ideal for a central heating system in homes with up to 2 bedrooms and 1 bathroom.

Think flats, terraced homes and other rental style properties, this A rated compact combi is perfect for keeping bills down and using less power when required in these smaller proi.

Greenstar 1000 24kW combi boiler specification

Boiler ModelWorcester Bosch Greenstar 1000 25kW
Dimensions (mm)655 x 395 x 285 HWD
Hot water output24kW
Central heating output24kW
Flow rate8.5 l/min (40°c)
Erp RatingA
Warranty5 Years
Modulation ratio1:5

Want something more energy efficient and more features? Read our Worcester Bosch 4000 combi boiler review here

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Worcester Bosch 1000 combi boiler installation

A major part of the operation of your boiler relies on a top notch installation. Luckily, here at Boiler Central all our gas fitters are Gas Safe registered heating engineers.

Our fitters are used to complicated conversions or big back boiler removals, but you’ll be glad to know that Worcester Bosch 1000 boilers are easy to fit by design.

Easy fitting & Installations with Vertical Pre-Piping Assembly Kit

The Worcester 1000 comes with a vertical pre-piping assembly kit which is designed to aid efficiency all round.

To make soldering and connecting easier it the piping comes pre-bent with swaged ends. This kit means that it is compatible with Worcester’s rear spacer frame accessory.

Worcester estimate that it can make installations up to 30 minutes quicker, and we all know time is money! Customers and central heating professionals alike will love this innovative time-saving solution.

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Perfect for Landlords

If you’re a landlord looking for a reliable and cost-effective heating solution for your properties, the Greenstar 1000 is the answer. Its compact design, easy installation, and five-year guarantee make it an excellent choice for maintaining comfortable living conditions in your rental properties.

Worcester Bosch 1000 boiler price guide

As the Worcester 1000 combi is a budget boiler, expect to see average prices with installation around £1,975 for a combi swap. Costs will vary depending on the work required to fit the boiler using one of our Gas Safe registered heating engineers.

Therefore if you are looking at a conversion, the cost of a Worcester Bosch 1000 combi boiler will be around £2,500. If you have a back boiler and are looking to convert to a combi boiler then expect boiler prices around £2,900.

As its a cheap boiler it made our best combi boilers unders £1,000 shortlist for boilers that cost less that £1,000 without installation.

Get a fixed price online now for a Worcester Bosch 1000 combi in under 20 seconds using our fixed price tool.

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In conclusion, the Greenstar 1000 is not just a boiler; it’s a game-changer for homeowners and heating professionals alike.

Its budget-friendly price, space-saving design, and quality performance make it an unbeatable choice. Don’t miss out on the opportunity to experience the future of home heating. Upgrade to the Greenstar 1000 and enjoy warmth and peace of mind for years to come.


What is the Greenstar 1000, and what sets it apart from other boilers?

The Greenstar 1000 is a compact and budget-friendly boiler by Worcester Bosch. It stands out due to its space-saving design, easy installation, and quality performance.

Is the Greenstar 1000 suitable for small homes with limited space?

Yes, the Greenstar 1000 is designed for compact homes. It can fit into a standard 300 mm-deep cupboard, saving space while providing efficient heating.

What kind of warranty does the Greenstar 1000 offer?

The Greenstar 1000 provides a five-year guarantee, ensuring peace of mind for homeowners.

Can the Greenstar 1000 be used in rental properties for landlords?

Yes, the Greenstar 1000 is an excellent choice for landlords looking for a reliable and cost-effective heating solution for their rental properties.

When will the Greenstar 1000 be available for purchase?

It will be available from September 2023, you can purchase from us at Boiler Central.

What is the Worcester Bosch Greenstar range?

The Worcester Bosch Greenstar range is a series of boilers that are designed to provide efficient heating and hot water solutions for homes of different sizes.

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Written by
James Elston
James Elston Director Of Boiler Central
Posted on: 16th May 2024

James Elston is our resident boiler replacement and heating expert here at Boiler Central. With over 20 years experience in the boiler installation industry, James ensures that he knows everything there is about our Gas Safe boiler installations, energy saving and home heating solutions. This can be from simply procuring the latest best combi boilers, to reviewing and ensuring that Boiler Central maintains the highest standards across our boiler installation company.

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