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 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

£841.99

ex. VAT £701.66 Each

quantity

Product code: AH972

Worcester Bosch Greenstar 1000 Combi Boiler 24kW

£765.99

ex. VAT £638.32 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: AH907

Vaillant ecoTEC Plus 635 System Boiler 35kW

£2247.99

ex. VAT £1873.32 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

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

( 47 )

Product code: 11888

Made4Trade Circular Flue Guard 280 x 165mm Plastic Coated

£13.59

ex. VAT £11.32 Each

quantity

Product code: AH978

Worcester Bosch Greenstar 8000+ Combi Boiler 32kW

£1794.99

ex. VAT £1495.82 Each

quantity

Product code: 95889

Vokera Synergy Combi Boiler 30kW

£875.99

ex. VAT £729.99 Each

quantity

Product code: AE721

EHC Comet PV Electric System Boiler 2-8kW

£1239.99

ex. VAT £1033.32 Each

quantity

Electric Heating Company / EHC COMET Electric Boiler 12kW

( 1 )

Product code: 44405

EHC COMET Electric Boiler 12kW

£1265.99

ex. VAT £1054.99 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

Product code: 98543

Vaillant ecoTEC Plus 840 40kW Combi Boiler Only Power

£2412.49

ex. VAT £2010.41 Each

quantity

Product code: AH953

Worcester Bosch Greenstar 32CDi Compact Combi Boiler 32kW

£1762.49

ex. VAT £1468.74 Each

quantity

Product code: 45288

Vokera Synergy Combi Boiler 25kW

£845.99

ex. VAT £704.99 Each

quantity

Product code: AE722

EHC Comet PV Electric System Boiler 7.2-14.4kW

£1359.99

ex. VAT £1133.32 Each

quantity

Product code: 93540

EHC ASTRO V2 Electric Wall Mounted Combi Boiler 12kW

£1346.99

ex. VAT £1122.49 Each

quantity

Product code: AH979

Worcester Bosch Greenstar 8000+ Combi Boiler 45kW

£2651.99

ex. VAT £2209.99 Each

quantity

Product code: 87909

Vaillant ecoTEC Plus 832 32kW Combi Boiler Only Power

£2139.49

ex. VAT £1782.91 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: 36378

Ideal Logic+ Combi 2 Boiler ErP C30 30kW

£1349.99

ex. VAT £1124.99 Each

quantity

Product code: AH983

Worcester Bosch Greenstar 8000+ Combi LPG Boiler 40kW

£2311.99

ex. VAT £1926.66 Each

quantity

Product code: 28922

Worcester Greenstar Combi 4000 Boiler 25kW

£1474.49

ex. VAT £1228.74 Each

quantity

Product code: AH970

Worcester Bosch Greenstar 8000+ System Boiler 30kW

£1912.99

ex. VAT £1594.16 Each

quantity

Product code: 86285

Vaillant ecoTEC Plus 826 26kW Combi Boiler Only Power

£1950.49

ex. VAT £1625.41 Each

quantity

Product code: 42669

Vaillant ecoMAX/TEC Elbow 45°

£156.49

ex. VAT £130.41 Per unit £78.25/Each

quantity

Product code: 20935

Vaillant ecoFIT Pure 835 Combi Boiler with Flue and Magnetic Filter 35KW

£1868.49

ex. VAT £1557.07 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: AH982

Worcester Bosch Greenstar 2000 Combi Boiler 30kW

£1161.99

ex. VAT £968.32 Each

quantity

Product code: 51926

Vaillant ecoTEC Plus 630 30kW System Boiler Only Power

£2213.99

ex. VAT £1844.99 Each

quantity

( 14 )

Product code: 23885

FlueSnug 100mm Black

£17.35

ex. VAT £14.46 Each

quantity

Product code: 28513

EHC ASTRO V2 Electric Wall Mounted Combi Boiler 14.4kW

£1579.99

ex. VAT £1316.66 Each

quantity

Product code: 31392

EHC SLIM JIM Electric Flow Boiler 10kW

£843.19

ex. VAT £702.66 Each

quantity

Product code: AH951

Worcester Bosch Greenstar 36CDi Compact Combi Boiler 36kW

£2067.99

ex. VAT £1723.32 Each

quantity

Product code: 60705

EHC SLIM JIM Electric Flow Boiler 4kW

£749.99

ex. VAT £624.99 Each

quantity

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

Product code: 79739

EHC FUSION COMET Three Phase System Boiler 39kW

£2149.99

ex. VAT £1791.66 Each

quantity

Product code: 20915

EHC SLIM JIM Electric Flow Boiler 7kW

£830.79

ex. VAT £692.32 Each

quantity

Product code: AH905

Glowworm Energy System Boiler 18kW

£1254.99

ex. VAT £1045.82 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

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

Product code: AH913

Vaillant ecoTEC Plus 615 System Boiler 15kW

£1506.99

ex. VAT £1255.82 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

quantity

Vokera / Vokera Wall Brackets All Boilers

( 1 )

Product code: 39332

Vokera Wall Brackets All Boilers

£44.49

ex. VAT £37.07 Each

quantity

Product code: AH965

Worcester Bosch Greenstar 8000+ Combi LPG Boiler 50kW

£3160.99

ex. VAT £2634.16 Each

quantity

Product code: AH952

Worcester Bosch Greenstar 27i Compact System Boiler 27kW

£1753.49

ex. VAT £1461.24 Each

quantity

Product code: AH917

Glowworm Energy Combi Boiler 35kW

£1515.99

ex. VAT £1263.32 Each

quantity

Product code: AH986

Worcester Bosch Greenstar 2000 Combi Boiler 25kW

£1022.99

ex. VAT £852.49 Each

quantity

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