Best 30kw Combi Boilers That Money Can Buy

Finding the right boiler for your home can seem like an impossible task, particularly when there are so many different brands and models available on the market that each boast incredible features.

That’s why we’ve put together this helpful guide for the best combi boilers under 30kW to help you decide which boiler is best for your home.

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What Is A Combi Boiler?

Combi (combination) boilers link a home’s central heating system and water heating into a single unit, with all components integrated within the boiler. The combi signals a sensor upon hot water demand, then takes water directly from the mains and the heat exchanger heats it for distribution to water outlets. This means there's no accompanying cylinder or hot water tank. This allows a compact boiler which could fit into a standard kitchen cupboard or be wall mounted, to thoroughly heat a home without stealing lots of space. Combi systems are also easier to service or for boiler replacement due to their popularity, meaning greater availability.

Best Low Price Combi Boilers Under 30kW

Alpha E-Tec 28kW

The Alpha E-Tec is our most affordable combi boiler under 30kW, however, despite the low cost, this boiler doesn’t compromise on quality. The entire E-Tec range features a brand new stainless steel heat exchanger and is Alpha’s most compact model yet.

Having a smaller sized unit allows an easy fit in a standard kitchen cupboard and servicing is made simple with front access.

Boiler spec:

• 10 Years Warranty on parts and labour with iHeat

• Efficiency A Rating @ 89%

• Flow rate 12.1 l/m

• Dimensions W 440mm, D 255mm, H 712mm

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Worcester Bosch Greenstar 2000 25kW

The Greenstar 2000 is Worcester's price competitive combi boiler, suitable for apartments, small and medium sized homes with one bathroom.

Worcester’s quietest combi boiler yet, this has been designed to provide an attractive solution that comfortably fits inside a kitchen cupboard to maximise space in your home.

Boiler spec:

• 6 Years Warranty on parts and labour

• Efficiency A-Rated @ 93%

• Flow rate 9 l/m

• Dimensions W 400mm, D 300mm, H 724mm

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Viessmann Vitodens 050-W 29kW

With compact dimensions, low weight and quiet operation, the attractively priced Vitodens 050-W is a low-cost gas condensing boiler that will integrate effortlessly into any living space and does not compromise on quality; making it ideal for both new build homes and modernisations. It’s no wonder it was reviewed as a Which? Best Buy in 2017, 2018 and 2019.

Boiler spec:

• 10 Years Warranty on parts and labour

• Efficiency A Rating @ 89.1%

• Flow rate 12.3 l/m

• Dimensions W 400mm, D 350mm, H 707mm

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Ideal Logic+ 30kW

Perfect for smaller homes, the Ideal Logic+ System is the smallest in physical size of our range, meaning it can be easily stored away in a kitchen cupboard or smaller space. Thanks to its incredible 90% energy efficiency, this system boiler can seriously lower your heating bills, making it a worthwhile investment.

With so many fantastic features packaged into a compact unit, it’s no wonder the Ideal Logic+ was voted the 2013 Good Housekeeping Reader Recommended Best Combi Boiler and became the Winner of the Queen’s Award for Enterprise in Innovation for 2013.

Boiler spec:

• 10 Years Warranty on parts and labour

• Efficiency A-Rated 89%

• Flow rate 12.5l/m

• Dimensions W 395mm, D 279mm, H 700mm

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Best Premium Combi Boilers Under 30kW

Worcester Bosch Greenstar CDI Compact 28kW

The Greenstar CDi Compact is a high powered combi boiler suitable for small, medium and large-sized properties with one or two bathrooms. This boiler is designed to fit within a standard kitchen cupboard, so you can maximise space elsewhere in your home and provides instantaneous hot water with an aluminium silicon heat exchanger and a low energy pump, helping to reduce the boiler’s electrical consumption and keeping your energy bills down.

Boiler spec:

• 10 Years Warranty on parts and labour

• Efficiency A-Rated @ 91%

• Flow rate 11.4 l/m

• Dimensions W 390mm, D 280mm, H 680mm

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Viessmann Vitodens 100-W 16kW/19kW

Efficient, quiet and affordable, the Vitodens 100-W gas condensing boiler is our most popular solution available at iHeat, delivering impressive results from a compact frame. Featuring innovative technology and services combined with reliability and longevity and comes ready for smart technology, helping you to optimise your heating and save on energy costs. What more could you ask for?

Boiler spec:

• Warranty: 10 Years on parts and labour

• Boiler type: Heat Only

• Efficiency: A-Rated @ 89.5%

• Low Output Options: 16kW and 19kW

• Dimension: W 400mm, D 350mm, H 700mm

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Worcester Bosch Greenstar 4000 25kW

According to Worcester, the Greenstar 4000 has been built on all the tried, tested and much-loved features of the Greenstar i, making it instantly familiar and yet totally transformed. Perfect for small to medium sized homes with one bathroom, it features a brand new modern design with an easy to use full colour text display. The Greenstar 4000 has a wide power range to meet all of your heating and hot water needs, whilst doing so efficiently.

Boiler spec:

• 10 Years Warranty on parts and labour

• Boiler type: Heat Only

• Efficiency A-Rated @ 91%

• Flow rate 10.2 l/m

• Dimensions W 400mm, D 310mm, H 724mm

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Worcester Bosch 8000 Style 30kW

The latest Worcester Bosch boiler is the most premium on the market, featuring a modern new design whilst being packed with innovative new features that help keep your home warm, energy bills low and your boiler working at its best. If you’re after an attractive boiler available in either white or black, this is the boiler for you.

Boiler spec:

• 10 Years Warranty on parts and labour

• Boiler type: Heat Only

• Efficiency A-Rated @ 94%

• Max output 30kW

• Flow rate 12.3 l/m

• Dimensions W 440mm, D 365mm, H 780mm

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Looking for a Boiler Under 30kW?

At iHeat, you can get a brand new boiler plus installation at an affordable price. Just answer a few quick and easy questions here and get a free, fixed quote in a matter of seconds.