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Combi Boilers

Shop high-performance combi boilers from trusted brands at Toolstation, including Vokera, Ideal Boilers, Vaillant, Viessmann and Baxi. Whether you need a small combi boiler for your home or an industrial combi boiler for the workplace, we’ve got plenty of products available.

What Is the Best Combi Boiler?



If you’re wondering how to choose the right combi boiler, there are a few factors to consider. As a general rule, the more hot water you use, the higher the kilowatt rating you’ll need. For example, if you live in a flat or house with up to ten radiators and one bathroom, a 24-27kw combi boiler is the ideal choice.

For homes with up to fifteen radiators and two bathrooms, a 28-34kw combi boiler is best. Large homes or businesses with up to twenty radiators and two or more bathrooms should opt for a 35-42kw boiler.

Combi boilers are often the most energy-efficient choice in any central heating system, with options available to suit all budgets and home configurations. Check out our Boiler Buying Guide for more details on these and other boilers.
Baxi Baxi Baxi / Baxi 600 Series Combi Boiler 24kW
( 11 )

£989.98

ex. VAT £824.98 Each

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Baxi Baxi Baxi / Baxi 800 Series Combi Boiler 36kW
( 7 )

£1501.58

ex. VAT £1251.32 Each

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Ideal Boilers Ideal Boilers / Ideal Logic Max Combi Boiler 24kW

£1190.78

ex. VAT £992.32 Each

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Ideal Boilers Ideal Boilers / Ideal Logic Max Combi Boiler 30kW
( 2 )

£1273.28

ex. VAT £1061.07 Each

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Worcester Bosch Worcester Bosch / Worcester Greenstar Combi 4000 Boiler 30kW

£1491.28

ex. VAT £1242.73 Each

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Ideal Boilers Ideal Boilers / Ideal Vogue Max Combi Boiler 40kW
( 1 )

£1714.98

ex. VAT £1429.15 Each

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Baxi Baxi / Baxi 600 Series Combi Boiler 30kW
( 17 )

£1137.98

ex. VAT £948.32 Each

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Vokera Vokera / Vokera Unica MAX Combi Boiler 35kW
( 1 )

£1117.58

ex. VAT £931.32 Each

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Baxi Baxi / Baxi 800 Series Combi Boiler 30kW
( 6 )

£1395.08

ex. VAT £1162.57 Each

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Vokera Vokera / Vokera Vision Plus Combi Boiler 25kW
( 1 )

£773.48

ex. VAT £644.57 Each

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Ideal Boilers Ideal Boilers / Ideal Logic+ Combi Boiler ErP C24 24kW

£1148.18

ex. VAT £956.82 Each

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Viessmann Viessmann / Viessmann Vitodens 100-W Combi Boiler 26kW

£1406.28

ex. VAT £1171.90 Each

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Vokera Vokera / Vokera Vision Plus Combi Boiler 30kW
( 1 )

£815.98

ex. VAT £679.98 Each

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Viessmann Viessmann / Viessmann Vitodens 100-W Combi Boiler 35kW
( 2 )

£1480.28

ex. VAT £1233.57 Each

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Vaillant Vaillant / Vaillant ecoTEC Plus Combi Boiler 38kW

£1834.88

ex. VAT £1529.07 Each

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Viessmann Viessmann / Viessmann Vitodens 050-W BOKA Combi Boiler 30kW
( 1 )

£1120.98

ex. VAT £934.15 Each

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Vaillant Vaillant / Vaillant ecoFIT Pure Combi Boiler 35KW

£1612.78

ex. VAT £1343.98 Each

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Vaillant Vaillant / Vaillant ecoFIT Pure Combi Boiler 30kW

£1452.08

ex. VAT £1210.07 Each

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Vaillant Vaillant / Vaillant ecoTEC Plus Combi Boiler 25kW

£1476.38

ex. VAT £1230.32 Each

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Vaillant Vaillant / Vaillant ecoTEC Plus Combi Boiler 32kW

£1636.78

ex. VAT £1363.98 Each

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Vaillant Vaillant / Vaillant ecoTEC Plus Combi Boiler 35kW

£1726.38

ex. VAT £1438.65 Each

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Vokera Vokera / Vokera Unica MAX Combi Boiler 40kW

£1259.48

ex. VAT £1049.57 Each

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Vaillant Vaillant / Vaillant ecoFIT Pure Combi Boiler 25kW

£1290.08

ex. VAT £1075.07 Each

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Viessmann Viessmann / Viessmann Vitodens 100-W Combi Boiler 30kW
( 2 )

£1422.48

ex. VAT £1185.40 Each

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