Central Heating Supplies
Boilers

Boilers

(196 products)

Shop high-quality boilers from trusted brands like Ideal Boilers, Vokera, Vaillant and Baxi. At Toolstation, you’ll find gas combi boilers and...

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.

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Vokera / Vokera Vibe MAX Combi Boiler 26C 25kW

( 13 )

Product code: 36777

Vokera Vibe MAX Combi Boiler 26C 25kW

£638.99

ex. VAT £532.49 Each

quantity

Vokera / Vokera Vibe MAX Combi Boiler 30C 30kW

( 13 )

Product code: 27309

Vokera Vibe MAX Combi Boiler 30C 30kW

£682.99

ex. VAT £569.16 Each

quantity

Product code: AH981

Worcester Bosch Greenstar 1000 Combi Boiler 30kW

£858.00

ex. VAT £715.00 Each

quantity

Worcester Bosch / Worcester Greenstar Combi 4000 Boiler 30kW

Save £26

Product code: 82864

Worcester Greenstar Combi 4000 Boiler 30kW

£1573.49 was £1599.98

ex. VAT £1311.24 Each

quantity

Product code: AH972

Worcester Bosch Greenstar 1000 Combi Boiler 24kW

£765.99

ex. VAT £638.32 Each

quantity

Product code: AH978

Worcester Bosch Greenstar 8000+ Combi Boiler 32kW

£1865.00

ex. VAT £1554.17 Each

quantity

Product code: AH982

Worcester Bosch Greenstar 2000 Combi Boiler 30kW

£1206.49

ex. VAT £1005.41 Each

quantity

Vaillant / Vaillant ecoFIT Pure 825 Combi Boiler with Flue and Magnetic Filter 25kW

( 3 )

Product code: 34270

Vaillant ecoFIT Pure 825 Combi Boiler with Flue and Magnetic Filter 25kW

£1658.49

ex. VAT £1382.07 Each

quantity

Product code: AH906

Glowworm Energy Heat Only Boiler 30kW

£1415.99

ex. VAT £1179.99 Each

quantity

Product code: AH984

Worcester Bosch Greenstar 2000 Combi LPG Boiler 30kW

£1273.49

ex. VAT £1061.24 Each

quantity

Vokera / Vokera Fixed Length Horizontal Flue Kit Compact Pinnacle, Synergy, Vibe Max and Easi-Heat

( 8 )

Product code: 19387

Vokera Fixed Length Horizontal Flue Kit Compact Pinnacle, Synergy, Vibe Max and Easi-Heat

£111.99

ex. VAT £93.32 Each

quantity

Product code: AH979

Worcester Bosch Greenstar 8000+ Combi Boiler 45kW

£2756.00

ex. VAT £2296.67 Each

quantity

Product code: AH907

Vaillant ecoTEC Plus 635 System Boiler 35kW

£2358.49

ex. VAT £1965.41 Each

quantity

Tower Plumbing / Tower Auto Bypass Valve 22mm

( 27 )

Product code: 28336

Tower Auto Bypass Valve 22mm

£22.69

ex. VAT £18.91 Each

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Product code: 87909

Vaillant ecoTEC Plus 832 32kW Combi Boiler Only Power

£2139.49

ex. VAT £1782.91 Each

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Vokera / Vokera Unica MAX System Boiler 20kW

Save £214

( 1 )

Product code: 73786

Vokera Unica MAX System Boiler 20kW

£914.84 was £1129.18

ex. VAT £762.37 Each

quantity

Product code: AH983

Worcester Bosch Greenstar 8000+ Combi LPG Boiler 40kW

£2403.00

ex. VAT £2002.50 Each

quantity

Made4Trade / Made4Trade Circular Flue Guard 280 x 165mm Plastic Coated

( 49 )

Product code: 11888

Made4Trade Circular Flue Guard 280 x 165mm Plastic Coated

£13.59

ex. VAT £11.32 Each

quantity

Vokera / Vokera Pinnacle Combi Boiler 35kW

( 1 )

Product code: 73228

Vokera Pinnacle Combi Boiler 35kW

£1081.99

ex. VAT £901.66 Each

quantity

Product code: AH970

Worcester Bosch Greenstar 8000+ System Boiler 30kW

£1988.00

ex. VAT £1656.67 Each

quantity

Product code: AH951

Worcester Bosch Greenstar 36CDi Compact Combi Boiler 36kW

£2067.99

ex. VAT £1723.32 Each

quantity

Vokera / Vokera HE Plume Management Kit All Flues

( 2 )

Product code: 74670

Vokera HE Plume Management Kit All Flues

£82.49

ex. VAT £68.74 Each

quantity

Product code: 36378

Ideal Logic+ Combi 2 Boiler ErP C30 30kW

£1349.99

ex. VAT £1124.99 Each

quantity

Vokera / Vokera Vertical Flue Kit Compact A DIN, Vision, Evolve & Unica MAX

( 2 )

Product code: 21716

Vokera Vertical Flue Kit Compact A DIN, Vision, Evolve & Unica MAX

£154.49

ex. VAT £128.74 Each

quantity

Product code: AH908

Glowworm Energy Heat Only Boiler 25kW

£1351.99

ex. VAT £1126.66 Each

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Product code: 85561

Worcester Greenstar HE Standard Telescopic Flue

£148.99

ex. VAT £124.16 Each

quantity

Product code: AI006

Vaillant ecoTEC Plus 940 Combi Boiler 40kW (2 Boxes)

£2765.49

ex. VAT £2304.57 Each

quantity

Product code: AH913

Vaillant ecoTEC Plus 615 System Boiler 15kW

£1579.99

ex. VAT £1316.66 Each

quantity

Product code: 21888

Vaillant ecoFIT Pure 830 Combi Boiler with Flue and Magnetic Filter 30kW

£1731.99

ex. VAT £1443.32 Each

quantity

( 1 )

Product code: 88383

Vokera 90° Flue Bend All Flues

£53.99

ex. VAT £44.99 Each

quantity

Made4Trade / Made4Trade Circular Flue Guard 280 x 165mm Zinc Plated Mild Steel

( 21 )

Product code: 44728

Made4Trade Circular Flue Guard 280 x 165mm Zinc Plated Mild Steel

£19.99

ex. VAT £16.66 Each

quantity

Product code: 51926

Vaillant ecoTEC Plus 630 30kW System Boiler Only Power

£2213.99

ex. VAT £1844.99 Each

quantity

Ideal Boilers / Ideal Logic+ Combi 2 Boiler ErP C24 24kW

( 1 )

Product code: 85188

Ideal Logic+ Combi 2 Boiler ErP C24 24kW

£1169.49

ex. VAT £974.57 Each

quantity

Product code: 98543

Vaillant ecoTEC Plus 840 40kW Combi Boiler Only Power

£2412.49

ex. VAT £2010.41 Each

quantity

Baxi / Baxi 600 Combi 2 Boiler Range 24kW

( 1 )

Product code: 45331

Baxi 600 Combi 2 Boiler Range 24kW

£1249.99

ex. VAT £1041.66 Each

quantity

( 1 )

Product code: 99673

Vokera HE 1m Plume Extension

£42.99

ex. VAT £35.82 Each

quantity

Vokera / Vokera Unica MAX System Boiler 30kW

Save £218

Product code: 27352

Vokera Unica MAX System Boiler 30kW

£989.99 was £1208.38

ex. VAT £824.99 Each

quantity

( 15 )

Product code: 94308

FlueSnug 100mm White

£19.79

ex. VAT £16.49 Each

quantity

Vokera / Vokera Pitched Roof Flashing Kit All Flues

( 1 )

Product code: 15241

Vokera Pitched Roof Flashing Kit All Flues

£61.99

ex. VAT £51.66 Each

quantity

Ideal Boilers / Ideal Logic Max Combi 2 Boiler 30kW

( 2 )

Product code: 82539

Ideal Logic Max Combi 2 Boiler 30kW

£1692.99

ex. VAT £1410.82 Each

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Product code: AE721

EHC Comet PV Electric System Boiler 2-8kW

£1229.99

ex. VAT £1024.99 Each

quantity

Product code: AH916

Glowworm Energy System Boiler 30kW

£1456.99

ex. VAT £1214.16 Each

quantity

Vokera / Vokera Pinnacle Combi Boiler 30kW

( 1 )

Product code: 81799

Vokera Pinnacle Combi Boiler 30kW

£999.99

ex. VAT £833.32 Each

quantity

( 4 )

Product code: 13762

Baxi 800 Combi 2 Boiler 36kW

£2199.99

ex. VAT £1833.32 Each

quantity

Product code: 39407

Vokera Flat Roof Flashing Kit All Flues

£48.99

ex. VAT £40.82 Each

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Vokera / Vokera Telescopic Horizontal Flue Kit Compact A DIN, Vision, Evolve & Unica MAX

( 4 )

Product code: 81063

Vokera Telescopic Horizontal Flue Kit Compact A DIN, Vision, Evolve & Unica MAX

£105.99

ex. VAT £88.32 Each

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Baxi / Baxi Standard Horizontal Flue 685mm

( 17 )

Product code: 37983

Baxi Standard Horizontal Flue 685mm

£114.99

ex. VAT £95.82 Each

quantity

Product code: AH993

Worcester Bosch Greenstar 4000 Combi LPG Boiler 30kW

£1718.99

ex. VAT £1432.49 Each

quantity

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