Central Heating Supplies
Boilers

Boilers

(195 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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Ideal Boilers / Ideal Vogue Max Combi Boiler 32kW

( 1 )

Product code: 24356

Ideal Vogue Max Combi Boiler 32kW

£1890.49

ex. VAT £1575.41 Each

quantity

Product code: AH919

Glowworm Energy Heat Only Boiler 18kW

£1299.49

ex. VAT £1082.91 Each

quantity

Ideal Boilers / Ideal Vogue Max Combi Boiler 26kW

( 1 )

Product code: 26393

Ideal Vogue Max Combi Boiler 26kW

£1744.99

ex. VAT £1454.16 Each

quantity

Product code: AH966

Worcester Bosch Greenstar 27Ri Compact Regular Boiler 27kW

£1614.99

ex. VAT £1345.82 Each

quantity

Product code: 30489

Ideal Vogue Max System Boiler 26kW

£1900.99

ex. VAT £1584.16 Each

quantity

Product code: AH998

Worcester Bosch Greenstar 21Ri Boiler ErP+ 21kW

£1430.49

ex. VAT £1192.07 Each

quantity

Product code: AH955

Worcester Bosch Greenstar 30Ri Compact Regular Boiler 30kW

£1677.99

ex. VAT £1398.32 Each

quantity

Product code: 31392

EHC SLIM JIM Electric Flow Boiler 10kW

£843.19

ex. VAT £702.66 Each

quantity

Product code: 53968

EHC SLIM JIM Electric Flow Boiler 14.4kW

£931.29

ex. VAT £776.07 Each

quantity

Product code: AH974

Worcester Bosch Greenstar 4000 System Boiler 18kW

£1574.00

ex. VAT £1311.67 Each

quantity

Baxi / Baxi Multifit IFOS Weather Compensation Kit Extension Kit

( 1 )

Product code: 56899

Baxi Multifit IFOS Weather Compensation Kit Extension Kit

£20.09

ex. VAT £16.74 Each

quantity

Product code: 79739

EHC FUSION COMET Three Phase System Boiler 39kW

£2149.99

ex. VAT £1791.66 Each

quantity

Product code: AH956

Worcester Bosch Greenstar 30Ri Compact Regular LPG Boiler 30kW

£1770.99

ex. VAT £1475.82 Each

quantity

Product code: 88267

Ideal Logic/Vogue2 Integral Mechanical Clock

£92.99

ex. VAT £77.49 Each

quantity

Product code: 71418

EHC SLIM JIM Electric Flow Boiler 12kW

£887.59

ex. VAT £739.66 Each

quantity

Product code: AI002

Worcester Bosch Greenstar 4000 System LPG Boiler 12kW

£1521.49

ex. VAT £1267.91 Each

quantity

Product code: AH915

Vaillant ecoTEC Plus 620 System Boiler 20kW

£1744.99

ex. VAT £1454.16 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: 62718

Ideal Logic Max System 2 Boiler 30kW

£1796.99

ex. VAT £1497.49 Each

quantity

Product code: AE569

Vaillant VR71 5 Relay Output Wiring Centre

£268.49

ex. VAT £223.74 Each

quantity

Product code: AC480

Glow-worm Flue Extension 1m

£78.49

ex. VAT £65.41 Each

quantity

Product code: AH909

Glowworm Energy Combi Boiler 25kW

£1309.99

ex. VAT £1091.66 Each

quantity

( 1 )

Product code: 74771

Baxi Plume Displacement Kit 135°

£39.29

ex. VAT £32.74 Per unit £19.65/Each

quantity

Product code: AH976

Worcester Bosch Greenstar 4000 System Boiler 21kW

£1673.99

ex. VAT £1394.99 Each

quantity

( 1 )

Product code: 57117

Baxi Flue Bend 93°

£57.99

ex. VAT £48.32 Each

quantity

Product code: 71838

EHC Shower Flow Sensor

£149.99

ex. VAT £124.99 Each

quantity

Baxi / Baxi Flue Extension 1m with Fixing Screws

( 3 )

Product code: 70574

Baxi Flue Extension 1m with Fixing Screws

£68.99

ex. VAT £57.49 Each

quantity

Product code: 73667

Vokera Pinnacle System Boiler 32kW

£1183.99

ex. VAT £986.66 Each

quantity

Product code: 20915

EHC SLIM JIM Electric Flow Boiler 7kW

£830.79

ex. VAT £692.32 Each

quantity

Product code: AI001

Worcester Bosch Greenstar 4000 Combi LPG Boiler 25kW

£1570.99

ex. VAT £1309.16 Each

quantity

Product code: 93540

EHC ASTRO V2 Electric Wall Mounted Combi Boiler 12kW

£1346.99

ex. VAT £1122.49 Each

quantity

Product code: AH960

Worcester Bosch Greenstar 27i Compact System LPG Boiler 27kW

£1856.99

ex. VAT £1547.49 Each

quantity

Product code: 35273

Ideal Vogue Max System Boiler 32kW

£2004.99

ex. VAT £1670.82 Each

quantity

Product code: 80970

Baxi Roof Flashing Flat

£51.99

ex. VAT £43.32 Each

quantity

Baxi / Baxi Plume Displacement Kit 1m Telescopic Flue

( 3 )

Product code: 86326

Baxi Plume Displacement Kit 1m Telescopic Flue

£114.99

ex. VAT £95.82 Each

quantity

Product code: AH980

Worcester Bosch Greenstar 4000 System LPG Boiler 18kW

£1675.99

ex. VAT £1396.66 Each

quantity

Product code: AC479

Glow-worm 45° Elbow Pipe

£98.49

ex. VAT £82.07 Pair

quantity

Product code: 26705

Vokera Pinnacle System Boiler 20kW

£1080.99

ex. VAT £900.82 Each

quantity

Product code: 97148

Ideal Logic Max Combi 2 Boiler 24kW

£1557.99

ex. VAT £1298.32 Each

quantity

Baxi / Baxi Multifit IFOS Weather Compensation Kit Combi Boilers

( 1 )

Product code: 38383

Baxi Multifit IFOS Weather Compensation Kit Combi Boilers

£46.89

ex. VAT £39.07 Each

quantity

Product code: 79115

EHC FUSION COMET Three Phase System Boiler 19kW

£1585.49

ex. VAT £1321.24 Each

quantity

Baxi / Baxi Plume Displacement Kit Extension and Brackets

( 1 )

Product code: 68889

Baxi Plume Displacement Kit Extension and Brackets

£44.99

ex. VAT £37.49 Each

quantity

Product code: AH961

Worcester Bosch Greenstar 30i Compact System LPG Boiler 30kW

£1907.99

ex. VAT £1589.99 Each

quantity

Product code: AE503

Glow-worm Flat Roof Flashing

£44.59

ex. VAT £37.16 Each

quantity

Product code: AH969

Worcester Bosch Greenstar 4000 System LPG Boiler 21kW

£1768.49

ex. VAT £1473.74 Each

quantity

( 3 )

Product code: 18209

Baxi Flue Bend 135°

£104.99

ex. VAT £87.49 Per unit £52.50/Each

quantity

Product code: 89898

Ideal Logic Max System 2 Boiler 24kW

£1807.49

ex. VAT £1506.24 Each

quantity

Baxi / Baxi Flue Extension 0.25m with Fixing Screws

( 4 )

Product code: 56624

Baxi Flue Extension 0.25m with Fixing Screws

£45.29

ex. VAT £37.74 Each

quantity

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