Category - Boilers
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Will Scholfield, Engineer

28 Apr : Updated 8 Jan ● 10 min read

Baxi vs. Worcester Bosch boilers - An updated review and comparison for 2024

So, the time has come for you to get a new boiler. Your current central heating system might be old, worn out, or experiencing faults for whatever reason, but the upshot is that you need to find a replacement that is going to meet your hot water needs for the years to come.

With so many options available, though, it can be tricky to know which one is right for you! Do you go for a system boiler or a combi boiler? What power rating should you choose? Which manufacturer is the best? The list of questions goes on.

For anyone who’s struggling to decide on the make and model of boiler to buy for their home, we’re here to help. Our boiler experts will take you through the pros and cons of Baxi and Worcester Bosch boilers and provide you with honest, impartial information about which one is going to perform best in your home.

Not convinced that Baxi or Worcester Bosch is right for you? Check out our other comparison guides to learn about different boiler manufacturers!

Who are Baxi and Worcester Bosch?

Baxi and Worcester Bosch are two of the biggest, most popular boiler manufacturers around. For good reason, though, with them both being known for making great ranges of high-quality, efficient boilers that are perfect for heating homes of all types and sizes. Let’s look at them in a bit more detail.

Introduction to Baxi boilers

Baxi has been manufacturing boilers in the UK since 1866 and includes products and services from a range of different brand names, including Main Heating and Megaflo

With headquarters in Lancashire, Baxi provides a selection of mid-range combi, standard and system boilers to meet the heating requirements of different homes and commercial buildings.

Baxi is widely known for offering award-winning customer service, industry-leading parts guarantees and labour warranties. It also gets an impressive 4.5-star rating from nearly 48,000 reviews on Trustpilot. 

Introduction to Worcester Bosch boilers

Worcester Bosch was formed in 1962 when the UK-based Worcester brand merged with the Germany-based Bosch group. Since then, it has earned a reputation as one of the most reliable and trusted boiler manufacturers in the UK.

Its current product range includes gas and oil boilers, hot water cylinders, renewable technologies such as heat pumps and solar water heating systems, as well as a growing range of controls and accessories.

Worcester Bosch holds a warrant to supply boilers for the King’s Sandringham Estate, meaning their products and services get the royal seal of approval!

Baxi vs. Worcester Bosch: Boiler technology

Baxi

Worcester Bosch

Baxi boilers have their own uSense smart thermostat, which can be controlled with a smartphone app. Smart thermostats allow users to modulate and schedule temperatures, as well as monitor their energy consumption.

With this technology, users can better understand how to improve energy efficiency and save money on energy bills. USense can also turn on the anti-frost feature during lower temperatures.

Worcester Bosch boilers have digital controls on their smart home boilers with 7-day scheduling abilities and mechanical controls that allow for 24-hour programming. 

They also have their own smart thermostat, Bosch EasyControl, which can even be linked to Amazon Alexa.

Baxi vs. Worcester Bosch: Boiler price

There’s no getting around the fact that the price of a boiler will be a major factor in deciding whether or not it’s the right one for your home. Boilers certainly aren’t cheap pieces of kit, so it’s important to know that you’re spending money on the best possible model. Here’s a rundown of the price comparison between Baxi and Worcester Bosch boilers.

Baxi

Worcester Bosch

For a Baxi combi boiler, you can expect to pay anywhere in the region of £730 to £1300, depending on things like power output, energy efficiency and hot water cylinder capacity.

Baxi has boiler models at a range of different price points, meaning you should be able to find one that’s within your budget. Generally, it's considered to be one of the more affordable boiler brands, but this definitely doesn’t mean that its products or services are of lower quality.

It’s worth noting, though, that buying directly through Baxi will mean that the price quoted won’t necessarily include added extras like installation costs, so you’ll need to factor these into the total price. If you choose to buy a new Baxi boiler through BOXT, installation discounts are available, and we offer fixed-price quotes as standard.

For a Worcester Bosch boiler, you can expect to pay anything from £700 for a compact model to £2500 for one of their top-of-the-range options. 

As with Baxi, Worcester Bosch has a range of models at different price points, so it’s worth comparing them against one another to find the one that’s right for your home.

Worcester Bosch is seen as being a more premium manufacturer, and this is reflected in its prices. It’s definitely not money wasted, though, as Worcester Bosch’s boilers are multi-award-winning and proven to be more than capable of meeting high usage levels.

The price quoted may not include installation and set-up fees, so be sure to factor these into the total cost to avoid any surprises!

Baxi vs. Worcester Bosch: Boiler features

Baxi

Worcester Bosch

Some of the best Baxi features include:

  • Industry-leading aftercare and customer service
  • The Easy-Fill platinum combi boiler feature allows you to use one button to top up the pressure without needing to call out an engineer
  • Up to 10-year manufacturer warranty on certain models
  • Controls are easy to use
  • Their combi boilers are easy to install
  • Endorsed by the Energy Savings Trust

Some of the best Worcester Bosch features include:

  • Up to 12 years manufacturer-backed guarantee on certain models
  • They are considered to be one of the most reliable boiler brands in the UK
  • Easy controls with clear temperature displays
  • Frost protection is provided through the condensed sure siphon that is installed with all units
  • Their boilers have some of the best energy efficiency ratings on the market

Baxi vs. Worcester Bosch: Boiler guarantees and aftercare

Baxi

Worcester Bosch

Baxi offers a range of different warranty options depending on the level of cover you want. Parts and labour warranties of up to 10 years are available, giving you complete peace of mind that everything can be taken care of in the event of a breakdown, fault, or system error.

In order for your boiler warranty to be valid, a Gas Safe engineer must carry out the boiler installation, and the boiler itself must be registered no more than 30 days after installation. You must also ensure that the boiler is serviced every 12 months.

Worcester Bosch boilers are available with 5, 10 or 12-year guarantees depending on the model and installation method you choose. 

The warranty is extended if you agree to have your boiler installed by an accredited installer, for example.

The range of cover options available from both Baxi and Worcester Bosch can sometimes be confusing, especially if you don’t know what you’re looking for. This is why at BOXT, we clearly display the length of the warranty on all models and will register it with the manufacturer for you. So you don't need to worry!

Baxi vs. Worcester Bosch: Boiler efficiency

Baxi

Worcester Bosch

Baxi combi boilers have been specifically designed to be highly energy-efficient, and boilers such as the BAXI Platinum 28kw have an efficiency rating of 89%. 

Worcester Bosch has long been renowned for the efficiency of its boilers, and the Greenstar range features some of its best offerings yet.

The Greenstar 28CDi Compact, for example, is A-rated and has an efficiency level of 94%. This can be increased to an impressive 98% with the addition of a Smart controller.

Baxi vs. Worcester Bosch: Boiler size and power output

Size and power output are both important things to consider when choosing a new boiler - you’ll want to make sure that it’s going to fit neatly inside a cupboard or kitchen cabinet and that it’s going to be able to provide enough hot water for your household’s requirements…nobody wants a cold shower, after all!

When we compare Baxi and Worcester Bosch, both brands have a range of different options with cylinder sizes and hot water outputs to suit your needs. 

The Baxi 600, for example, measures 390mm x 700mm x 285mm (W, H, D). The equivalent product from Worcester Bosch is the Greenstar 12, which measures 390mm x 600mm x 270mm (W, H, D). There’s not really a lot in it, but it’s still important to measure up your space in millimetres before choosing a new boiler model to ensure that it’s going to fit when the installer arrives.

In terms of power output, Worcester Bosch has a greater selection of options. Baxi boilers are available in kW outputs ranging from 24kW to 40kW, whilst Worcester Bosch boilers are available in kW outputs ranging from 25kW all the way up to 100kW. This means that if you have a larger home with increased heating and hot water requirements, a Baxi boiler might not be able to meet your needs.

Baxi boiler models

Boiler NameFuel TypeAvailable InEfficiencyHot Water Flow RateWarranty
Baxi 200 CombiGas24 kW, 28 kW89%9.8 l/min (24 kW), 11.4 l/min (28 kW)2-year parts and labour warranty
Baxi 400 CombiGas24 kW, 30 kW89%9.8 l/min (24 kW), 11.9 l/min (30 kW)5-year parts and labour warranty
Baxi 600 CombiGas24 kW, 30 kW, 36 kW89%10.2 l/min (24 kW), 12.2 l/min (30 kW), 15.0 l/min (36 kW)7-year parts and labour warranty
Baxi 800 CombiGas25 kW, 30 kW, 36 kW93%10.2 l/min (25 kW), 12.2 l/min (30 kW), 15.0 l/min (36 kW)10-year parts and labour warranty
Baxi Duo-tec CombiGas24 kW, 28 kW, 33 kW, 40 kW88.6%9.8 l/min (24 kW), 11.5 l/min (28 kW), 13.5 l/min (33 kW), 16.4 l/min (40 kW)7-year parts and labour warranty
Baxi Platinum CombiGas24 kW, 28 kW, 33 kW, 40 kW89%9.8 l/min (24 kW), 11.5 l/min (28 kW), 13.5 l/min (33 kW), 16.4 l/min (40 kW)10-year parts and labour warranty

Worcester Bosch boiler models 

Boiler NameFuel TypeAvailable InEfficiencyHot Water Flow RateWarranty
Greenstar i Combi BoilerGas27kW, 30kW89%Up to 10 years when installed by a Worcester Accredited Installer
Greenstar Si Compact Combi BoilerGas25kW, 30kW94%8.9l/min (25kW), 10.7l (30kW)Up to 10 years when installed by a Worcester Accredited Installer
Greenstar CDi Compact Combi BoilerGas32kW, 36kW94%11.5 l/min (32kW), 12.9 l/min (36kW)Up to 10 years when installed by a Worcester Accredited Installer
Greenstar Heatslave II Combi BoilerOil18kW, 25kW, 32kW90%15 l/min (18kW), 18 l/min (25kW), 22 l/min (32kW)Up to 7 years when installed by a Worcester Accredited Installer
Greenstar 2000 Combi BoilerGas25kW, 30kW93%9 l/min (25kW), 10.8l/min (30kW)Up to 6 years when installed by a Worcester Accredited Installer
Greenstar 8000 Life Combi BoilerGas40kW, 45kW, 50kW94%14.3 l/min (40kW), 16.1 l/min (45kW), 17.9 l/min (50kW)Up to 12 years when installed by a Worcester Accredited Installer
Greenstar 8000 Style Combi BoilerGas30kW, 35kW, 40kW, 45kW, 50kW94%12.3 l/min (30kW), 14.3 l/min (35kW), 16.4 l/min (40kW), 18.3 l/min (45kW) 20.3 l/min (50kW)Up to 12 years when installed by a Worcester Accredited Installer
Greenstar i System BoilerGas9kW, 12kW, 15kW, 18kW, 21kW, 24kW94%Up to 10 years when installed by a Worcester Accredited Installer

So, what’s the verdict?

Ultimately, both Baxi and Worcester Bosch are reputable, reliable boiler manufacturers with decades of experience in providing UK homes with central heating systems. 

If you’re trying to decide between them both, it’s probably going to come down to things like your budget and the size of your home. If you’re looking for a more affordable boiler, Baxi is your best bet. Baxi’s range of economy combi boilers is seen as being one of the best on the market, with thousands of 4 and 5-star reviews. Compact boilers will be more than capable of delivering hot water to smaller homes with only 1 or 2 bathrooms and fewer radiators.

Read Baxi boiler servicing for more information.

If, however, you want to spend a little more and get a premium option that will be able to meet the hot water needs of a large home with lots of radiators, bathrooms, and family members, a Worcester Bosch boiler is the one for you. These have higher power outputs and larger water cylinders, meaning they’ll be able to deliver hot water to different areas of your home simultaneously.

If you need any more support in choosing the best boiler for your home, check out our other boiler guides.

Or, discover the best-suited boiler for your home with our online Find a Boiler tool which provides tailored recommendations based on your home/heating/hot water requirements. 

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