The Best Combi Boilers 2025

Are you due a Combi Boiler replacement in 2025? If so, read on. We have created a handy guide outlining the latest Combi Boilers from the UK’s top manufacturers. The Boilers listed in this guide suit all budgets.

A combi Boiler (Combination Boiler) is the most common type of Boiler fitted in the UK.

With a combi boiler, everything is built into the Boiler itself. So you don’t need a cylinder, pump, water tank or other components to serve hot water to your taps or radiators.

Combi Boilers are generally cheaper than ‘System’ (requires a pressurized cylinder) or ‘Regular’ Boilers (requires a cylinder and water tanks), quicker and easier to fit and are energy efficient.

Here are our favourite Combi Boilers for 2025

Best Premium Combi Boilers 2025

Veissmann Vitodens 100-W Series

The Vitodens 100-W series, encompassing both system and combi boilers, alongside the Vitodens 111-W, represents an ideal heating solution for medium-sized homes with 2-4 bedrooms and two bathrooms.

These wall-mounted gas condensing boilers boast a substantial heating output range of 3.2 to 32 kW, ensuring efficient warmth for your home.

Not only do they offer an attractive price-to-performance ratio, but they also stand out for their simple and intuitive operation.

Additionally, these boilers are future-ready, supporting a 20% hydrogen blend, aligning with modern environmental standards and fuel adaptability.

10-Year Warranty

Worcester Bosch Greenstar 8000 Style

The Greenstar 8000 Style is the top of the range Boiler from the renowned Worcester Bosch Smart black design with an easy-to-use digital display.

With five power outputs available ranging from 30 to 50kW, the Greenstar Style is suitable for all sizes of homes, especially larger properties with two-plus bathrooms.

The Greenstar Style boasts A-rated energy efficiency and a 12-year guarantee.

Baxi Platinum Combi

The Baxi Platinum Combi is a reliable Boiler built in the UK from Brass components of the highest quality, ensuring many years of trouble-free use.

The Platinum Combi is simple to repressurize, so householders don’t need to call a gas engineer, and it includes a 10-year guarantee for parts and labour (conditions apply)

‘A’ rated energy efficiency for both hot water and heating with sizes up to 40kw available.

Vaillant Ecotec Exclusive With Green IQ

The Ecotec Exclusive with Green IQ is Vaillants premium Combi Boiler. The Boiler offers excellent energy efficiency with low fuel consumption with smart technology that adapts the heat to exactly what you need reducing wastage.

Compatible with Vsmart, which allows you to control the Boiler via an app on your phone. Ecotec has A-rated energy efficiency and is very eco-friendly, being 85% recyclable.

Includes a 10-year guarantee and is available in sizes 35 or 43kw.

Best Mid-Range Combi Boilers 2025

Veissman Vitodens 050-W

The Vitodens 050-W gas condensing boiler, compatible with a 20% H₂ blend, is the quintessential choice for smaller homes and apartments, thanks to its compact design, low weight, and quiet operation.

It offers a versatile solution to meet diverse heating needs in combi and system boiler configurations. With a notable heating output ranging from 3.2 to 35 kW, it efficiently caters to the warmth requirements of smaller spaces.

The boiler’s compact footprint is complemented by an attractive price-to-performance ratio, making it an economical and space-saving choice for modern living environments.

7-Year Warranty

Worcester Greenstar 2000

Worcester Bosch’s quietest and lowest-priced combi boiler is the Greenstar 2000. In addition, a water-saving feature called Quick Tap is featured to reduce wasted energy and money.

This Combi is ideal for small to medium-sized homes with a single bathroom. Its compact design allows easy fitting in discreet places.

‘A’ rated energy efficiency and Includes a guarantee of 5-6 years.

Baxi 600 Combi

The Baxi 600 Combi is compact and powerful, with the option of controlling it from your phone or tablet.

The Boiler includes easy-fill (for simple re-pressurization without an engineer) and is made in the UK with high-quality brass parts.

‘A’ rated energy efficiency with 3 sizes available, 24kW, 30kW and 36kW

Glow-Worm Energy Combi

The Glow-Worm Energy Combi is built in the UK and A-rated with an aluminium heat exchanger which runs smoothly and silently. Designed to last many years and save money on your energy bills.

The energy combis compact size and rear flue option allow installation in various locations throught the home.

Available in sizes 25, 30 and 35kW includes a 7-year guarantee that can be extended to 10 years.

Potterton Promax 24

The Potterton Promax 24 Combi Boiler is perfect for small to medium-sized properties with single bathrooms with an output rating of 24kw.

The Promax has ‘A’ rated energy efficiency and a ‘multifit’ flue for flexible fitting options both horizontally and vertically.

The Promax includes a 2-year warranty.

Vaillant Ecotec Plus

The Vaillant Ecotec Plus is an all-rounder with four sizes of 25, 32, 35 or 38kW, a model for most sizes of homes.

The EcoTEC automatically reduces the amount of power consumed when necessary, reducing wastage and saving money.

The Boiler includes a premium stainless-steel heat exchanger and a five year guarantee as standard, which can be increased to 7-10 years if required.

Best Budget Combi Boilers 2025

Ideal Exclusive 2

Elevate your home heating experience with the Ideal Exclusive2 Gas Combi Boiler, a versatile and efficient option with available outputs of 24kW, 30kW, and 35kW.

Tailored to be cost-effective and energy-efficient, it boasts an exceptional ErP seasonal efficiency rating of 94%, surpassing industry standards. This translates to reduced energy costs and a smaller environmental footprint for your household.

The Ideal Exclusive2 is designed for seamless integration and ease of use, featuring improved connectivity through OpenTherm wiring. This enhancement simplifies the management of your heating system and ensures compliance with Boiler Plus regulations, streamlining your setup process.

This wall-mounted unit, operating on natural gas, is also prepared for the future with its compatibility with a 20% Hydrogen blend.

Baxi 200 Combi

The Baxi 200 Combi Boiler has ‘A’ rated energy efficiency and is hydrogen ready, allowing you to reduce your carbon emissions once hydrogen is rolled out.

The Baxi 200 features a stainless steel heat exchanger and is available in two sizes, 24kW and 28kW.

A 2-year guarantee is included with the Boiler.

Glow-Worm Easicom

The Easicom features an aluminium heat exchanger, LCD display and traditional analogue clock and can be upgraded with Glow-Worms advanced controls for increased energy efficiency.

An A-rated budget Boiler with a five-year guarantee. Two sizes are available,e 24 or 28 kW.

Potterton Assure 30

The Potterton Assure 30 is easy to use and maintain and includes several smart features.

Gas engineers can access the internal components easily through a front access panel, making servicing a breeze.

The Boiler is compact and lightweight and includes A-rated efficiency and a two-year warranty.

Do You Want One Of The Above Boilers Fitted At The Best Price?

TM Hughes & Son have fitted Boilers throughout the county of Essex for over three decades. We are approved installers for most of the UK’s major Boiler manufacturers, including the ones listed.

We would like to offer you a free, no-obligation Boiler survey and quote for your new Combi Boiler.

Please Contact Us for more details.