Combi Boiler Prices

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Combi Boiler Prices use the following known brands: Worcester, Valliant, Baxi, Ideal, Viessmann and Glow Worm
  • Worcester
  • Vaillant
  • Baxi
  • Ideal
  • Viessmann
  • Glow Worm

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Save up to £305 a year on heating bills with your new Combi Boiler

Did you know? Combi Boilers are the most common boiler type in the UK with over 70% of UK homes choosing them over other types.
92% Efficiency Rating as of 2018
  • As of 2018 all Gas Combi Boilers installed in the UK are legally required to be at least 92% efficient.
  • For every £1 you spend on energy, only 8p is wasted.
  • Combi Boilers are highly efficient and could help you save up to £305 a year on heating bills.
  • Combi Boilers are small and compact, ideal for those living in small homes or flats.
  • Combi Boilers are relatively easy to install and maintain, which means cheaper installation costs.
  • Combi Boilers produce hot water on demand, doing away with long waits for water tank refills.
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Combi Boiler Prices

Our Guide to Combi Boiler & Installation Prices

Combi Boiler Prices can vary hugely and depend on numerous factors, home size, output, brand, warranty, etc… but generally you can expect to pay anywhere between £500 to £1,500 for a new Combi Boiler—plus extra for installation.

When choosing a new Combi Boiler it’s important to get the right size and power output (kW output) relative to your home, this will ensure your Combi Boiler can sufficiently support your home's heating needs.

Our ‘Combi Boiler Prices Guide’ lists suitable Combi Boiler options (for specific home sizes) together with particulars, allowing you to compare models, warranties and prices.

* This guide was designed to give you a quick idea of expected Combi Boiler Prices, however, we’d always recommend you seek advice from a qualified installer with regards to boiler size and output.

  • Options for Small 1–2 Bedroom Homes

    The following Combi Boilers are suitable for homes with up to 1-2 bedrooms (24 kW to 27 kW Output).

    Brand/Model Size/Output Efficiency Warranty Price
    Brand: Biasi Inovia Combi Size/Output: 25kW Efficiency: A Warranty: 5 years Price: £610
    Brand: Baxi 200 Combi Size/Output: 24kW Efficiency: A Warranty: 3 years Price: £630
    Brand: Glow-worm Energy Combi Size/Output: 25kW Efficiency: A Warranty: 7 years Price: £790
    Brand: Vaillant ecoTEC Pro Combi Size/Output: 24kW Efficiency: A Warranty: 2 years Price: £884
    Brand: Ideal Vogue Max Combi Size/Output: 26kW Efficiency: A Warranty: 10 years Price: £1,109

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  • The following Combi Boilers are suitable for homes with up to 3-4 bedrooms (28 kW to 34 kW Output).

    Brand/Model Size/Output Efficiency Warranty Price
    Brand: Biasi Riva Plus Combi Size/Output: 28kW Efficiency: A Warranty: 2 years Price: £514
    Brand: Ferroli Modena HE Combi Size/Output: 32kW Efficiency: A Warranty: 5 years Price: £635
    Brand: Glow-worm Energy Combi Size/Output: 30kW Efficiency: A Warranty: 7 years Price: £850
    Brand: Ideal Logic Max Combi Size/Output: 30kW Efficiency: A Warranty: 10 years Price: £965
    Brand: Vaillant ecoTEC Plus Combi Size/Output: 32kW Efficiency: A Warranty: 5 years Price: £1,250

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  • The following Combi Boilers are suitable for homes with up to 4+ bedrooms (35kW to 42 kW Output).

    Brand/Model Size/Output Efficiency Warranty Price
    Brand: Biasi Inovia Combi Size/Output: 35kW Efficiency: A Warranty: 5 years Price: £658
    Brand: Ferroli Modena HE Combi Size/Output: 38kW Efficiency: A Warranty: 5 years Price: £791
    Brand: Ideal Logic+ Combi Size/Output: 35kW Efficiency: A Warranty: 7 years Price: £1,011
    Brand: Baxi EcoBlue Advance Combi Size/Output: 40kW Efficiency: A Warranty: 10 years Price: £1,250
    Brand: Vaillant ecoTEC Plus Combi Size/Output: 38kW Efficiency: A Warranty: 5 years Price: £1,500

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  • You’d be right in thinking that Combi Boilers are cheaper than Regular Boilers (sometimes known as traditional, conventional or heat-only boilers) to install, this is thanks to less elements reducing the work involved, plus a Combi Boiler doesn’t need to be connected to a hot water cylinder or feed tank in the attic, and can be pretty much installed anywhere in your home.

    If you’re looking for a quick change of Combi Boiler and require a replacement installed in the exact same spot, then expect to pay on average between £500–£700, should the upgrade/replacement be located elsewhere then costs typically range from £1,500–£1,800.

    If the installation is more complex, for example you’re looking to swap a Regular Boiler for a Combi then expect to pay more, this type of install takes longer as pipes will need to be re-plumped and the water tank and storage cylinder will need to be removed.

    The table below provides a quick idea of general Combi Boiler installation scenarios and prices.

    Scenario Price
    Scenario: Replacing a Combi Boiler with a new Combi Boiler in the same location Price: £500–£700
    Scenario: Replacing a Combi Boiler with a new Combi Boiler in a different location Price: £1,500–£1,800
    Scenario: Replacing a System Boiler with a new Combi Boiler Price: £2,000–£2,700
    Scenario: Replacing a Regular Boiler with a new Combi Boiler Price: £2,600–£3,000

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  • Popular independent consumer magazine Which? well known for testing and reviewing household products (including Combi Boilers), exists to give unbiased advice to consumers helping them to make informed decisions on purchases.

    The following tables list the top three recommended 'Combi Boiler Brands' and ‘Best Buy’ Combi Boilers (by Which? for 2018, 2017 respectively). The results were achieved by surveying over 10,000 boiler owners and engineers nationwide to find the most reliable and easiest to maintain Combi Boilers.

    Best Combi Boiler Brands

    Title Boiler Rating Price
    Title: Best Brand Overall Boiler: Worcester Bosch Greenstar 25i ErP Rating: 86% Price: £875
    Title: Most Reliable Boiler: Viessmann Vitodens 100-W Combi 26kW Rating: 83% Price: £913
    Title: Engineers Favourite Boiler: Vaillant ecoTEC exclusive Green iQ 835 Rating: 80% Price: £1,400

    'Best Buy' Combi Boilers

    Brand/Model Rating Price
    Brand/Model: Worcester Bosch, Greenstar 25i ErP Rating: 86% Price: £875
    Brand/Model: Worcester Bosch, Greenstar 25Si Compact ErP Rating: 86% Price: £967
    Brand/Model: Viessmann, Vitodens 050-⁠W 29 Rating: 83% Price: £1,018
    Brand/Model: Viessmann, Vitodens 200-⁠W Combi 26kW Weather comp Rating: 83% Price: £1,290
    Brand/Model: Vaillant, ecoTEC plus 835 Rating: 80% Price: £1,244
    Brand/Model: Vaillant, ecoFIT pure 825 Rating: 80% Price: £1,100

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