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.

Related Categories

Sort:

Product code: AI012

Vaillant Standard Horizontal Flue Terminal 60/100mm PP

£144.49

ex. VAT £120.41 Each

quantity

Product code: 75609

Viessmann Vitodens Flue Bend 87°

£46.99

ex. VAT £39.16 Each

quantity

Product code: 65349

Ideal Logic/Vogue Elbow 90°

£58.99

ex. VAT £49.16 Each

quantity

Ideal Boilers / Ideal Vogue Max Combi Boiler 40kW

( 1 )

Product code: 10268

Ideal Vogue Max Combi Boiler 40kW

£2077.99

ex. VAT £1731.66 Each

quantity

Product code: AH952

Worcester Bosch Greenstar 27i Compact System Boiler 27kW

£1753.49

ex. VAT £1461.24 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

Product code: 41694

Vokera Flue Extension 1m

£72.79

ex. VAT £60.66 Each

quantity

( 14 )

Product code: 23885

FlueSnug 100mm Black

£17.39

ex. VAT £14.49 Each

quantity

( 4 )

Product code: 29388

Baxi Flue Terminal Vertical

£149.49

ex. VAT £124.57 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

Ideal Boilers / Ideal Logic/Vogue Telescopic Flue Combi/System

( 3 )

Product code: 34509

Ideal Logic/Vogue Telescopic Flue Combi/System

£149.49

ex. VAT £124.57 Each

quantity

Product code: AH917

Glowworm Energy Combi Boiler 35kW

£1589.99

ex. VAT £1324.99 Each

quantity

Product code: AH964

Worcester Bosch Greenstar 8000+ Regular LPG Boiler 40kW

£2747.99

ex. VAT £2289.99 Each

quantity

Product code: 32889

Vokera 45° Flue Bend All Flues

£103.49

ex. VAT £86.24 Each

quantity

Product code: AH954

Worcester Bosch Greenstar 28CDi Compact Combi Boiler 28kW

£1562.99

ex. VAT £1302.49 Each

quantity

Product code: 16553

Viessmann Vitodens 100/200-W Flue Fixing Bracket

£11.49

ex. VAT £9.57 Each

quantity

Product code: AH921

Glowworm Energy Heat Only Boiler 12kW

£1174.99

ex. VAT £979.16 Each

quantity

Vokera / Vokera Mechanical Clock Kit with Cover Compact & Vision

( 3 )

Product code: 80533

Vokera Mechanical Clock Kit with Cover Compact & Vision

£80.99

ex. VAT £67.49 Each

quantity

Product code: AH963

Worcester Bosch Greenstar 8000+ System LPG Boiler 30kW

£2052.99

ex. VAT £1710.82 Each

quantity

Ideal Boilers / Ideal Logic/Vogue Elbow 45°

( 1 )

Product code: 15418

Ideal Logic/Vogue Elbow 45°

£105.49

ex. VAT £87.91 Per unit £52.75/Each

quantity

Product code: AH905

Glowworm Energy System Boiler 18kW

£1315.49

ex. VAT £1096.24 Each

quantity

Product code: AH914

Glowworm Energy Heat Only Boiler 15kW

£1236.99

ex. VAT £1030.82 Each

quantity

Product code: AC487

Worcester Greenstar Flue Extension 1m

£84.33

ex. VAT £70.27 Each

quantity

Ideal Boilers / Ideal Logic/Vogue Horizontal Flue Terminal 1m

( 1 )

Product code: 55499

Ideal Logic/Vogue Horizontal Flue Terminal 1m

£189.99

ex. VAT £158.32 Each

quantity

Product code: 49038

Vokera Flue Extension 500mm

£51.99

ex. VAT £43.32 Each

quantity

Baxi / Baxi Multifit IFOS Weather Compensation Kit Ridge Tile

( 1 )

Product code: 38689

Baxi Multifit IFOS Weather Compensation Kit Ridge Tile

£183.49

ex. VAT £152.91 Each

quantity

Product code: AH959

Worcester Bosch Greenstar 30i Compact System Boiler 30kW

£1822.49

ex. VAT £1518.74 Each

quantity

Vaillant / Vaillant Flue Extension ecoMAX/TEC 2m

( 1 )

Product code: 16456

Vaillant Flue Extension ecoMAX/TEC 2m

£140.49

ex. VAT £117.07 Each

quantity

Product code: AH953

Worcester Bosch Greenstar 32CDi Compact Combi Boiler 32kW

£1762.49

ex. VAT £1468.74 Each

quantity

Product code: 42669

Vaillant ecoMAX/TEC Elbow 45°

£156.49

ex. VAT £130.41 Per unit £78.25/Each

quantity

( 1 )

Product code: 86519

Vokera HE 45° Plume Diverter

£30.99

ex. VAT £25.82 Each

quantity

Product code: 78589

Vaillant Flue Extension ecoMAX/TEC 0.5m

£66.49

ex. VAT £55.41 Each

quantity

( 4 )

Product code: 31740

Baxi 800 Combi 2 Boiler 30kW

£1929.99

ex. VAT £1608.32 Each

quantity

Vokera / Vokera Synergy Combi Boiler 30kW

( 1 )

Product code: 95889

Vokera Synergy Combi Boiler 30kW

£875.99

ex. VAT £729.99 Each

quantity

Product code: AE524

FS5 FlueSnug 100mm White

£18.49

ex. VAT £15.41 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

Baxi / Baxi Standard Telescopic Horizontal Flue

( 3 )

Product code: 48150

Baxi Standard Telescopic Horizontal Flue

£135.99

ex. VAT £113.32 Each

quantity

Baxi / Baxi Flue Extension 0.5m with Fixing Screws

( 4 )

Product code: 48330

Baxi Flue Extension 0.5m with Fixing Screws

£55.99

ex. VAT £46.66 Each

quantity

Product code: 70283

Viessmann Vitodens Flue Bend 45°

£80.49

ex. VAT £67.07 Per unit £40.25/Each

quantity

Product code: AC483

Worcester Bosch Greenstar 45 Degree Elbow

£118.41

ex. VAT £98.67 Pair

quantity

Product code: AH986

Worcester Bosch Greenstar 2000 Combi Boiler 25kW

£1062.49

ex. VAT £885.41 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: AE567

Worcester Bosch EasyControl CT 200 Black

£204.48

ex. VAT £170.40 Each

quantity

Product code: AC486

Worcester Greenstar 90° Elbow

£70.64

ex. VAT £58.87 Each

quantity

( 1 )

Product code: 62654

Baxi 800 Combi 2 Boiler 24kW

£1699.99

ex. VAT £1416.66 Each

quantity

Product code: 84517

Viessmann Vitodens Vertical Flue Terminal

£142.49

ex. VAT £118.74 Each

quantity

Product code: 28922

Worcester Greenstar Combi 4000 Boiler 25kW

£1474.49

ex. VAT £1228.74 Each

quantity

Viessmann / Viessmann Vitodens Flue Extension 1m

( 1 )

Product code: 17436

Viessmann Vitodens Flue Extension 1m

£48.49

ex. VAT £40.41 Each

quantity

Products per page:

Page 2 of 5