Boilers
Shop high-quality boilers from trusted brands like Ideal Boilers, Vokera, Vaillant and Baxi. At Toolstation, you’ll find gas combi boilers and system boilers compatible with most central heating systems.
What Are the Different Types of Boilers?
Combi boilers are a popular choice for many homes, heating water as you need it. They are smaller and more compact than system boilers, making them easier to install in any property.
System boilers store hot water in a cylinder after heating it, producing higher volumes on demand. They can be helpful for homes with two or more bathrooms. However, once the hot water supply has been used up, you’ll have to wait for the boiler to heat more.
Browse our full range of boilers and related accessories here, or check out our Boiler Buying Guide for more tips and advice on finding the right one for you.
How do I size a boiler for a house or building?
Boiler sizing depends on your heat load: number of radiators, insulation, number of bathrooms, and hot water demand.
Use kW rating - oversize slightly rather than undersize, but avoid huge overspec. For instance, a mid-size home might need 24–30 kW for a combi boiler. Consult heat loss calculations or use a rule of thumb per radiator/room.
Can I swap one boiler brand for another?
Yes - in many cases you can - but ensure compatibility: flue position, gas supply, pipework routing, control connections, and warranty implications. Reusing existing mounting, boiler room layout, and condensate routes can reduce installation challenges.
How often should I service a boiler?
Servicing your boiler annually is standard for most boilers. Regular servicing helps maintain efficiency, catch faults early, ensure safety, extend lifespan, and keep the warranty valid. Also check for leaks, carbon monoxide safety, flue integrity, pressure, and proper burner operation.
Product code: 27309
Vokera Vibe MAX Combi Boiler 30C 30kW
£661.49
ex. VAT £551.24 Each
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Product code: 36777
Vokera Vibe MAX Combi Boiler 26C 25kW
£594.98
ex. VAT £495.82 Each
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Product code: 51926
Vaillant ecoTEC Plus 630 30kW System Boiler Only Power
£2110.98
ex. VAT £1759.15 Each
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Product code: 98543
Vaillant ecoTEC Plus 840 40kW Combi Boiler Only Power
£2299.98
ex. VAT £1916.65 Each
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Product code: 34270
Vaillant ecoFIT Pure 825 Combi Boiler with Flue and Magnetic Filter 25kW
£1439.98 was £1599.98
ex. VAT £1199.98 Each
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Product code: 82864
Worcester Greenstar Combi 4000 Boiler 30kW
£1514.89 was £1599.98
ex. VAT £1262.41 Each
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Product code: 87909
Vaillant ecoTEC Plus 832 32kW Combi Boiler Only Power
£2039.98
ex. VAT £1699.98 Each
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Product code: 20935
Vaillant ecoFIT Pure 835 Combi Boiler with Flue and Magnetic Filter 35KW
£1715.96 was £1799.98
ex. VAT £1429.97 Each
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Product code: 95889
Vokera Synergy Combi Boiler 30kW
£746.98 was £846.46
ex. VAT £622.48 Each
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Product code: 21888
Vaillant ecoFIT Pure 830 Combi Boiler with Flue and Magnetic Filter 30kW
£1608.15 was £1699.98
ex. VAT £1340.12 Each
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Product code: 38523
Vaillant ecoTEC Plus 836 36kW Combi Boiler Only Power
£2159.98
ex. VAT £1799.98 Each
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Product code: 28922
Worcester Greenstar Combi 4000 Boiler 25kW
£1419.98
ex. VAT £1183.32 Each
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Product code: AH951
Worcester Bosch Greenstar 36CDi Compact Combi Boiler 36kW
£1967.57
ex. VAT £1639.64 Each
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Product code: 10268
Ideal Vogue Max Combi Boiler 40kW
£1999.98
ex. VAT £1666.65 Each
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Product code: AH988
Worcester Bosch Greenstar 15Ri Boiler ErP+ 15kW
£1239.49
ex. VAT £1032.91 Each
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Product code: AH953
Worcester Bosch Greenstar 32CDi Compact Combi Boiler 32kW
£1677.64
ex. VAT £1398.03 Each
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Product code: 35273
Ideal Vogue Max System Boiler 32kW
£1929.98
ex. VAT £1608.32 Each
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Product code: 73228
Vokera Pinnacle Combi Boiler 35kW
£978.98 was £1165.09
ex. VAT £815.82 Each
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Product code: 86285
Vaillant ecoTEC Plus 826 26kW Combi Boiler Only Power
£1859.98
ex. VAT £1549.98 Each
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Product code: 62718
Ideal Logic Max System 2 Boiler 30kW
£1559.98
ex. VAT £1299.98 Each
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Product code: AH999
Worcester Bosch Greenstar 24Ri Boiler Only ErP+ 24kW
£1406.68
ex. VAT £1172.23 Each
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Product code: AH998
Worcester Bosch Greenstar 21Ri Boiler ErP+ 21kW
£1366.84
ex. VAT £1139.03 Each
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Product code: AB005
Viessmann Vitodens 100-W Combi Boiler 26kW
£1896.16
ex. VAT £1580.13 Each
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